133 terms

AP 1: Chapter 14 Brain

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97 percent
The adult human brain contains almost ________ of the body's neural tissue. A) 15 percent B) 25 percent C) 68 percent D) 97 percent E) 35 percent
larger
Male brains are typically ________ compared to female brains. A) larger B) smaller C) the same size D) very smooth E) more convoluted
telencephalon
During embryonic development, which of the following secondary brain vesicles will form the cerebrum? A) telencephalon B) diencephalon C) mesencephalon D) metencephalon E) myelencephalon
prosencephalon
Which of these is not one of the main divisions of the adult brain? A) cerebrum B) diencephalon C) prosencephalon D) midbrain E) pons
diencephalon
Which of the following lies between the cerebrum and the brain stem? A) medulla oblongata B) pons C) mesencephalon D) diencephalon E) cerebellum
hypothalamus
The floor of the diencephalon is formed by the A) hypothalamus. B) thalamus. C) brain stem. D) mesencephalon. E) myelencephalon
pons
The tracts that connect the cerebellum to the brain stem are located in the A) medulla oblongata. B) pons. C) mesencephalon. D) diencephalon. E) thalamus.
medulla oblongata
Autonomic centers that control blood pressure, heart rate, and digestion are located in the A) medulla oblongata. B) pons. C) mesencephalon. D) diencephalon. E) cerebellum.
metencephalon
The cerebellum and pons develop from the A) telencephalon. B) diencephalon. C) mesencephalon. D) metencephalon. E) myelencephalon.
thalamus
Sensory information is processed and relayed to the cerebrum by the A) medulla oblongata. B) pons. C) midbrain. D) thalamus. E) cerebellum.
cerebrum
A neural cortex is found on the surface of the A) cerebrum. B) pons. C) thalamus. D) midbrain. E) pons.
A) more complex.
As you ascend from the medulla oblongata to the cerebrum, the functions of each successive level become A) more complex. B) simpler. C) better understood. D) more crucial to visceral functions. E) critical to reflexes.
hypothalamus
The ________ provides the principal link between the nervous and endocrine systems. A) cerebellum B) medulla oblongata C) cerebrum D) pons E) hypothalamus
septum pellucidum
The thin partition that separates the first and second ventricles is the A) falx cerebri. B) septum pellucidum. C) septum insula. D) interventricular foramina. E) cerebral aqueduct.
interventricular foramen
Each lateral ventricle communicates with the third ventricle through a(n) A) aqueduct of Sylvius. B) cerebral aqueduct. C) aqueduct of midbrain. D) interventricular foramen. E) medulla oblongata.
cerebral aqueduct.
The third and fourth ventricles are linked by a slender canal designated as the A) central canal. B) tentorium cerebelli. C) cerebral aqueduct. D) interventricular foramina. E) pontine canal.
fourth
The ventricle associated with the pons and upper medulla is the A) first. B) second. C) third. D) fourth. E) lateral.
ependymal
Specialized ________ cells form the secretory component of the choroid plexus. A) epididymal B) ependymal C) appended D) astrocytes E) blood
dural folds
The dural sinuses are located in the A) paranasal cavity. B) arachnoid. C) pia mater. D) dural folds. E) tentorium cerebelli.
A) pia mater
What structure is covered by many blood vessels and adheres tightly to the surface of the brain? A) pia mater B) arachnoid C) dura mater D) cranial plexus E) choroid plexus
D) internal carotid and vertebral arteries.
The brain requires a substantial blood supply. The vessels that deliver blood to the brain are the A) external carotid arteries. B) facial arteries. C) jugular veins. D) internal carotid and vertebral arteries. E) dural sinuses.
E) All of the answers are correct.
Which of the following is a property of the blood-brain barrier? A) The capillary endothelial cells are interconnected by tight junctions. B) It is generally permeable to lipid-soluble compounds. C) Astrocytes surround the CNS capillaries. D) It is absent in portions of the hypothalamus. E) All of the answers are correct.
B) falx cerebri.
The dural fold that projects into the longitudinal fissure between cerebral hemispheres is called the A) dural sinus. B) falx cerebri. C) tentorium cerebelli. D) falx cerebelli. E) choroid plexus.
A) is secreted by ependymal cells.
Cerebrospinal fluid A) is secreted by ependymal cells. B) is formed by a passive process. C) is normally produced twice as fast as it is removed. D) has almost the same composition as blood plasma. E) contains blood cells and blood plasma.
C) sulfadiazine
Which antibiotic enters the CNS without difficulty because it easily crosses the blood-brain barrier? A) tetracycline B) doxycycline C) sulfadiazine D) periostat E) Actisite
D) lateral and median apertures.
Cerebrospinal fluid enters the subarachnoid space through the A) interventricular foramina. B) aqueduct of Sylvius. C) dural sinus. D) lateral and median apertures. E) falx cerebri.
C) arachnoid granulations.
Cerebrospinal fluid enters the blood circulation at the A) jugular veins. B) dural drain. C) arachnoid granulations. D) tentorium cerebelli. E) frontal sinus.
E) All of the answers are correct.
Which of the following help to protect the brain? A) the blood-brain barrier B) the bones of the skull C) the cranial meninges D) the CSF E) All of the answers are correct.
D) subarachnoid space
What contains a spider web-like network of cells and fibers through which cerebrospinal fluid flows? A) subdural space B) dural sinus C) falx cerebri D) subarachnoid space E) pia mater
E) All of the answers are correct.
Ependymal cells work to A) surround the capillaries of the choroid plexus. B) secrete CSF into the ventricles. C) remove waste products from CSF. D) adjust the composition of CSF. E) All of the answers are correct.
A) 500 mL/day.
The choroid plexus produces CSF at a rate of about A) 500 mL/day. B) 250 mL/day. C) 50 mL/day. D) 1000 mL/day. E) 150 mL/day.
D) provides ATP for impulse transmission
Which of the following is not a function of cerebrospinal fluid? A) provides cushioning for delicate neural tissues B) provides buoyant support for the brain C) acts as a transport medium for nutrients D) provides ATP for impulse transmission E) acts as a transport medium for waste products
diffusion
As CSF circulates, ________ between it and the interstitial fluid of the CNS is unrestricted between and across the ependyma. A) osmosis B) perfusion C) diffusion D) convection E) conduction
astrocytes
The cells that cover the outer surfaces of CNS capillary endothelial cells are the A) blastocytes. B) astrocytes. C) monocytes. D) leukocytes. E) lymphocytes.
pia mater.
The layer of the meninges that closely follows every gyrus and sulcus is the A) pia mater. B) dura mater. C) arachnoid membrane. D) neural cortex. E) subarachnoid mater.
E) blockage of CSF circulation or excessive CSF production
Hydrocephalus or "water on the brain" may result from A) deficient production of cerebrospinal fluid. B) excessive production of cerebrospinal fluid. C) blockage of circulation of CSF. D) excessive water intake. E) blockage of CSF circulation or excessive CSF production
medulla oblongata
The control of heart rate and blood pressure is based in the A) cerebrum. B) cerebellum. C) diencephalon. D) medulla oblongata. E) heart.
E) blood pressure and respiration.
The medulla oblongata regulates A) somatic motor contractions. B) food intake. C) auditory reflexes. D) vision and hearing E) blood pressure and respiration.
the medulla oblongata
The respiratory rhythmicity center is located in A) the pons. B) the cerebrum. C) the medulla oblongata. D) the cerebellum. E) the midbrain.
medulla oblongata.
The cardiovascular reflexes are based in the A) cerebrum. B) mesencephalon. C) cerebellum. D) medulla oblongata. E) spinal cord.
A) are in the medulla and relay somatic sensory information to the thalamus
The nucleus gracilis and nucleus cuneatus

A) are in the medulla and relay somatic sensory information to the thalamus.
B) are in the pons and relay autonomic information from the hypothalamus.
C) pass motor information to the cerebellum.
D) are sensory gyri in the cerebral cortex.
E) are white tracts in the brain stem.
cerebellum
Overseeing the postural muscles of the body and making rapid adjustments to maintain balance and equilibrium are functions of the A) cerebrum. B) mesencephalon. C) cerebellum. D) pons. E) medulla oblongata.
vermis
The cerebellar hemispheres are separated by a band of cortex called the A) flocculonodular lobe. B) arbor vitae. C) folia. D) vermis. E) pyramid.
arbor vitae.
The white matter of the cerebellum forms the A) flocculonodular lobe. B) arbor vitae. C) folia. D) vermis. E) pyramid.
cerebellar cortex.
The presence of many large, highly-branched Purkinje cells in a sample of brain tissue indicates that it came from the A) pons. B) medulla. C) cerebral cortex. D) cerebellar cortex. E) arbor vitae.
ataxia
The cerebellum can be permanently damaged by stroke or temporarily affected by drugs or alcohol. The resulting disturbance in motor control is known as A) ataxia. B) aphasia. C) dysphagia. D) Parkinson's. E) epilepsy.
increased consciousness.
Stimulation of the reticular formation results in A) increased consciousness. B) sleep. C) coma. D) decreased cerebral function. E) coughing.
E) inferior colliculi.
The medulla oblongata relays auditory information to the A) substantia nigra. B) red nuclei. C) cerebral peduncles. D) superior colliculi. E) inferior colliculi.
B) red nuclei.
The regions of the mesencephalon that issue subconscious motor commands that affect upper limb position and background muscle tone are the A) tecta. B) red nuclei. C) cerebral peduncles. D) superior colliculi. E) inferior colliculi.
cerebral peduncles
Nerve fiber bundles on the ventrolateral surface of the mesencephalon are the A) tegmenta. B) corpora quadrigemina. C) cerebral peduncles. D) superior colliculi. E) inferior colliculi.
C) superior and inferior colliculi
The tectum of the mesencephalon contains the A) substantia nigra. B) red nuclei. C) superior and inferior colliculi. D) cerebral peduncles. E) basal ganglia.
superior colliculi
The ________ receive visual input from the lateral geniculates. A) substantia nigra B) red nuclei C) cerebral peduncles D) superior colliculi E) inferior colliculi
C) react to a bright light.
Damage to the superior colliculi would interfere with the reflex ability to A) express rage. B) voluntarily move the arm. C) react to a bright light. D) react to loud noises. E) maintain proper posture.
E) inferior colliculi
The reflex movement of the head toward a loud noise is directed by the mesencephalon. Which nuclei accomplish this? A) substantia nigra B) red nuclei C) tectum D) superior colliculi E) inferior colliculi
C) visual and auditory reflex movements of the head and neck.
Damage to the corpora quadrigemina would interfere with A) control of autonomic function. B) regulation of body temperature. C) visual and auditory reflex movements of the head and neck. D) conscious control of skeletal muscles. E) control of breathing.
D) substantia nigra.
Examination of a tissue sample from the central nervous system reveals many darkly pigmented cells. This tissue probably came from the A) nucleus gracilis. B) nucleus cuneatus. C) motor cortex. D) substantia nigra. E) red nucleus.
E) All of the answers are correct.
Which of the following is a property of the mamillary bodies? A) control reflex eating movements B) process olfactory information C) located in posterior hypothalamus D) shaped like little breasts E) All of the answers are correct.
pulvinar
The ________ integrate(s) sensory information for projection to the cerebral cortex. A) pulvinar B) lateral geniculates C) medial geniculates D) supraoptic nuclei E) paraventricular nuclei
E) All of the answers are correct.
Which of the following is a function of the hypothalamus? A) produces ADH B) controls autonomic centers C) regulates body temperature D) secretes oxytocin E) All of the answers are correct.
B) forms the roof of the diencephalon
Which of the following is (are) true of the epithalamus? A) contains the mamillary body B) forms the roof of the diencephalon C) processes sensory information and relays it to the cerebrum D) forms the cerebrum E) creates the lateral ventricles
A) are part of the limbic system.
The anterior nuclei of the thalamus A) are part of the limbic system. B) secrete pituitary hormones. C) secrete melatonin. D) receive axon collaterals from the optic nerve. E) secrete pituitary hormones and melatonin.
B) connect emotional centers in the hypothalamus with the frontal lobe.
The medial nuclei of the thalamus A) are part of the limbic system. B) connect emotional centers in the hypothalamus with the frontal lobe. C) produce the hormone oxytocin. D) process visual information. E) process olfactory information.
E) All of the answers are correct.
The posterior nuclei of the thalamus include(s) the A) basal nuclei. B) lateral and medial geniculate nuclei. C) mamillary body. D) interthalamic adhesion. E) All of the answers are correct.
lateral geniculates.
The optic tracts carry visual information from the retina to the A) pulvinar. B) lateral geniculates. C) medial geniculates. D) supraoptic nuclei. E) paraventricular nuclei.
C) process sensory information and relay it to the cerebrum
Which of the following is a function of the thalamus? A) secrete cerebrospinal fluid B) secrete melatonin C) process sensory information and relay it to the cerebrum D) store memories E) regulate food intake
C) medial geniculates
The ________ relay auditory information to the auditory cortex. A) pulvinar B) lateral geniculates C) medial geniculates D) supraoptic nuclei E) paraventricular nuclei
C) control feeding reflexes.
The mamillary bodies of the hypothalamus A) regulate lactation. B) secrete oxytocin. C) control feeding reflexes. D) control heart rate and blood pressure. E) secrete antidiuretic hormone.
thalamus
The ________ filters and relays sensory information to cerebral cortex. A) cerebrum B) thalamus C) pons D) medulla oblongata E) cerebellum
C) reduced ability to regulate body temperature
Damage to the preoptic area of the hypothalamus leads to which problem? A) an intense thirst B) an uncontrolled sex drive C) reduced ability to regulate body temperature D) an insatiable appetite E) production of a large volume of urine
hypothalamus
Joe begins to experience mood swings and disturbed thirst and hunger. Imaging studies indicate that a brain tumor is the likely cause of these disorders. In what part of the brain is the tumor most likely located? A) prefrontal cortex B) postcentral gyrus C) basal nuclei D) hypothalamus E) reticular formation
globus pallidus
Which of the following is not a component of the limbic system? A) amygdaloid body B) cingulate gyrus C) globus pallidus D) hippocampus E) fornix
B) functions in maintaining homeostasis in cold weather
Which of the following is not a property of the limbic system? A) contains cerebral and diencephalic components B) functions in maintaining homeostasis in cold weather C) located between the border of the cerebrum and diencephalon D) links conscious functions of the cerebral cortex with unconscious functions of the brain stem E) functions in emotions, learning, and memory
hippocampus
The ________ is important in storage and recall of new long-term memories. A) amygdaloid body B) cingulate gyrus C) mamillary bodies D) hippocampus E) fornix
fornix
A tract of white matter that connects the hippocampus with the hypothalamus is the A) amygdaloid body. B) cingulate gyrus. C) mamillary bodies. D) hippocampus. E) fornix.
C) the limbic system
Terry suffers from dissociation of memories from their emotional content as the result of an automobile accident. What system of the brain is probably damaged? A) the prefrontal lobe B) the general interpretive area C) the limbic system D) the thalamus E) the putamen
A) Parkinson's disease.
Damage to the substantia nigra causes a decrease in the neurotransmitter dopamine. This causes a gradual, generalized increase in muscle tone, which is the main symptom of A) Parkinson's disease. B) rabies. C) Alzheimer's disease. D) myasthenia gravis. E) tetanus.
A) longitudinal fissure.
The two cerebral hemispheres are separated by the A) longitudinal fissure. B) central sulcus. C) transverse fissure. D) parieto-occipital sulcus. E) postcentral sulcus.
lobes
Divisions of the cerebral hemispheres that are named after the overlying skull bones are A) fissures. B) sinuses. C) lobes. D) sulci. E) gyri.
parietal lobe.
The cerebral area posterior to the central sulcus is the A) parietal lobe. B) temporal lobe. C) frontal lobe. D) occipital lobe. E) insula.
E) parietal and frontal lobes.
The region(s) of the cerebral cortex superior to the lateral sulcus is/are the A) parietal lobe. B) temporal lobe. C) frontal lobe. D) occipital lobe. E) parietal and frontal lobes.
insula
The region of the cerebral cortex that is medial and deep to the temporal lobe is the A) parietal lobe. B) temporal lobe. C) frontal lobe. D) occipital lobe. E) insula.
B) precentral gyrus.
The primary motor cortex is the surface of the A) insula. B) precentral gyrus. C) postcentral gyrus. D) arcuate gyrus. E) corpus callosum.
C) insula; frontal lobe
The sense of taste projects to the gustatory cortex located in the ________ and ________. A) insula; parietal lobe B) frontal lobe; temporal lobe C) insula; frontal lobe D) precentral gyrus; prefrontal cortex. E) corpus callosum; fornix
D) commissural fibers.
The corpus callosum is composed of A) arcuate fibers. B) longitudinal fasciculi. C) association fibers. D) commissural fibers. E) projection fibers.
primary sensory
The surface of the postcentral gyrus contains the ________ cortex. A) primary sensory B) primary motor C) visual D) olfactory E) auditory
E) projection fibers.
The internal capsule of the cerebrum is composed of A) arcuate fibers. B) longitudinal fasciculi. C) association fibers. D) commissural fibers. E) projection fibers.
occipital lobe.
The visual cortex is located in the A) frontal lobe. B) parietal lobe. C) temporal lobe. D) occipital lobe. E) insula.
C) temporal lobe.
The auditory cortex is located in the A) frontal lobe. B) parietal lobe. C) temporal lobe. D) occipital lobe. E) insula.
association
Cortical regions that interpret sensory information or coordinate motor responses are called ________ areas. A) commissural B) sensory C) association D) somesthetic E) processing
A) prefrontal cerebral cortex
The region of the brain responsible for predicting the consequence of events or actions is the A) prefrontal cerebral cortex. B) occipital association cortex. C) reticular formation. D) temporal lobe. E) cerebral ganglia.
C) inadequate production of dopamine by substantia nigra neurons.
Parkinson's disease is the result of
A) inadequate production of GABA by neurons in the basal nuclei.
B) decreased levels of acetylcholine from neurons in the substantia nigra.
C) inadequate production of dopamine by substantia nigra neurons.
D) hyperactivity of the limbic system.
E) weak response of the red nuclei of the mesencephalon.
B) left frontal
After suffering a stroke, Mary finds that she cannot move her right arm. This would suggest that the stroke damage is in the area of the ________ lobe. A) right frontal B) left frontal C) right temporal D) left temporal E) occipital
E) occipital lobe.
After suffering a blow to the back of the head, Phil loses his vision. The blow probably caused damage to the A) prefrontal cortex. B) postcentral gyrus. C) cerebral nuclei. D) limbic system. E) occipital lobe.
D) allows us to interpret what is read or heard.
The general interpretive area A) is the speech center of the brain. B) is responsible for predicting future consequences. C) is the site of long-term memory storage. D) allows us to interpret what is read or heard. E) may be damaged by even a small stroke.
A) the prefrontal cortex.
Difficulties in estimating temporal relationships between events may stem from damage to
A) the prefrontal cortex. B) the general interpretive area. C) Broca's area. D) Wernicke's area. E) the temporal lobe.
B) basal nuclei.
Within each hemisphere, deep to the floor of the lateral ventricle, you will find the A) anterior commissures. B) basal nuclei. C) motor association areas. D) visual cortex. E) auditory cortex.
A) amygdaloid bod
The ________ is located at the tip of the tail of the caudate nucleus. A) amygdaloid body B) claustrum C) putamen D) globus pallidus E) corpus striatum
C) lentiform nucleus.
The putamen and globus pallidus are frequently considered to be subdivisions of the A) caudate nucleus. B) claustrum. C) lentiform nucleus. D) corpus striatum. E) limbic system.
cerebrum
The highest levels of information processing occur in the A) cerebrum. B) diencephalon. C) cerebellum. D) medulla oblongata. E) corpus callosum.
E) All of the answers are correct.
If the corpus callosum is surgically cut, A) the two cerebral hemispheres operate independently. B) symptoms of the "disconnection syndrome" appear. C) objects touched by the left hand can be recognized but not verbally identified. D) conscious decisions are made without regard to sensations from the left side. E) All of the answers are correct.
D) able to see letters but unable to associate them into words.
A person with a damaged visual association area may be A) unable to see rows of letters. B) declared legally blind. C) unable to recognize letters but able to identify whole words and their meanings. D) able to see letters but unable to associate them into words. E) unable to understand spoken words.
C) verbally identify an object placed in her left hand.
Jane suffers from chronic seizures and in order to control the problem undergoes surgery in which the fibers of the corpus callosum are cut. As a result of this surgery she would likely be unable to A) speak. B) move her left arm. C) verbally identify an object placed in her left hand. D) recognize written words. E) touch her nose with her eyes closed.
Integrative
________ centers receive information from many association areas and direct extremely complex motor activities such as speech. A) Frontal B) Integrative C) Communication D) Terminal E) Vocal
E) All of the answers are correct.
Integrative centers concerned with the performance of complex processes are restricted to either the left or the right hemisphere. These complex processes include A) speech. B) writing. C) mathematical computation. D) understanding spatial relationships. E) All of the answers are correct.
C) voluntary motor activity.
Damage to the pyramidal cells of the cerebral cortex would directly affect A) perception of pain. B) sight. C) voluntary motor activity. D) hearing. E) sense of touch.
B) general interpretive area.
Bob is struck on the left side of the head and is knocked unconscious. When he recovers consciousness, he can hear individual words but cannot understand the meaning of phrases or sentences. This implies damage to his A) vestibulocochlear nerve. B) general interpretive area. C) speech center. D) prefrontal lobe. E) temporal lobe.
D) play the piano.
Damage to the premotor cortex of the frontal lobe would interfere with the ability to A) understand written words. B) understand spoken words. C) understand visual images. D) play the piano. E) sense the texture of velvet.
A) increased muscle tone.
Excitation of neurons in the basal nuclei would lead to A) increased muscle tone. B) loss of consciousness. C) inability to sense pain. D) sexual arousal. E) involuntary speech production.
E) A seizure
________ is a temporary cerebral disorder accompanied by abnormal movements, unusual sensations, and/or inappropriate behavior. A) Dyslexia B) Apraxia C) Aphasia D) Parkinson's disease E) A seizure
B) electroencephalogram
A(n) ________ is a printed record of the brain's electrical activity over a period of time. A) electrocardiogram B) electroencephalogram C) x-ray D) MRI E) CT scan
Aphasia
________ is a disorder affecting the ability to speak or read. A) Aphasia B) Ataxia C) Apraxia D) Bell's palsy E) Dysphagia
B) provide the general pattern and rhythm for movements such as walking.
The basal nuclei A) plan and coordinate voluntary muscle activity. B) provide the general pattern and rhythm for movements such as walking. C) coordinate sensory information. D) control the secretions of the pituitary gland. E) control respiration and blood pressure.
E) All of the answers are correct.
Higher-order functions A) can be adjusted over time based on experience. B) involve complex interactions among areas of the cortex. C) combine both conscious and unconscious information processing. D) occur in the cerebrum. E) All of the answers are correct.
olfaction
The only sensation that is received directly by the cerebrum is A) olfaction. B) gustation. C) hearing. D) vision. E) dizziness.
E) cranial nerve IX
Gustatory information reaches the brain by way of: A) cranial nerve I B) cranial nerve II C) cranial nerve X D) cranial nerve IV E) cranial nerve IX
B) Bell's palsy
________ is a condition resulting from an inflammation of a facial nerve. A) Cerebral palsy B) Bell's palsy C) Addison's disease D) Gout E) Hydrocephalus
12
There are ________ pairs of cranial nerves. A) 2 B) 6 C) 12 D) 22 E) 31
oculomotor
Droopy eyelids and double vision can result from injury to the ________ nerve. A) optic B) oculomotor C) trochlear D) olfactory E) abducens
B) III, IV, and VI.
The cranial nerves that innervate the eye muscles are A) I, II, and III. B) III, IV, and VI. C) II, III, and IV. D) II and VI. E) III and V.
trigeminal
The cranial nerve that has three major branches is the A) abducens. B) facial. C) vagus. D) trigeminal. E) glossopharyngeal.
C) mandibular branch of the trigeminal
Sensory innervation of the lower teeth and gums is by the ________ nerve. A) ophthalmic branch of the trigeminal B) maxillary branch of the trigeminal C) mandibular branch of the trigeminal D) glossopharyngeal E) hypoglossal
E) glossopharyngeal and vagus
Difficulty in swallowing may be a sign of damage to which cranial nerve(s)? A) vagus B) facial C) glossopharyngeal D) hypoglossal E) glossopharyngeal and vagus
corneal
A reflex that is used to assess the sensory function of the trigeminal nerve is the ________ reflex. A) corneal B) tympanic C) auditory D) vestibulo-ocular E) consensual
X
Which of the cranial nerves is named for the fact that it "wanders," that is, innervates structures throughout the thorax and abdomen? A) VIII B) IX C) X D) XI E) XII
D) hearing and equilibrium
Which sensation(s) does the vestibulocochlear nerve carry? A) hearing B) equilibrium C) atmospheric pressure D) hearing and equilibrium E) hearing, equilibrium, and taste
trigeminal
Jean needs to have a tooth in her mandible filled. Her dentist injects a local anesthetic to block pain afferents in one of her cranial nerves. What cranial nerve does the dentist numb? A) trochlear B) trigeminal C) facial D) glossopharyngeal E) hypoglossal
E) All of the answers are correct.
Tic douloureux is A) a disorder of the maxillary and mandibular branches of nerve V. B) characterized by almost totally debilitating pain. C) triggered by contact with the lip, tongue, or gums. D) also called trigeminal neuralgia. E) All of the answers are correct.
A) smell his food.
You suspect your friend has damage to cranial nerve I when he is unable to A) smell his food. B) smile. C) blink his eyes. D) nod his head. E) hear your voice.
olfactory bulb
Olfactory receptors send axons through the cribriform plate and synapse on neurons in the A) medulla. B) thalamus. C) cerebral cortex. D) olfactory bulb. E) olfactory tract.
A) axons from the nasal halves of each retina cross.
At the optic chiasm A) axons from the nasal halves of each retina cross. B) axons from the temporal halves of each retina cross. C) axons from the retinae synapse on those from the other half. D) the olfactory nerve crosses to the opposite side of the brain. E) the optic nerve enters the cerebellum.
hypoglossal
A patient develops a tumor of a cranial nerve that leads to difficulty in speaking from a loss of tongue movement. Which cranial nerve is affected? A) glossopharyngeal B) hypoglossal C) vagus D) spinal accessory E) trigeminal
C) weakness of the sternocleidomastoid muscle
Which of the following symptoms would you associate with damage to the spinal accessory nerve? A) loss of the sense of taste B) tooth pain C) weakness of the sternocleidomastoid muscle D) lack of facial expression E) dry mouth from lack of saliva
B) restricts the movement of auditory ossicles.
The tympanic reflex A) produces rapid blinking when something comes into contact with the cornea. B) restricts the movement of auditory ossicles. C) triggers a blink in response to sudden noises. D) causes the eyes to move in the opposite direction of a rotational movement of the head. E) causes the pupil of the eye to constrict when subjected to a bright light.