106 The Nervous System

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1.The term central nervous system refers to the ________.

a.autonomic nervous system
b.brain, spinal cord, and peripheral nerves
c.brain and spinal cord
d.spinal cord and spinal nerves

c.brain and spinal cord

2.The nervous system has three overlapping functions. Which of the following represents a logical sequence of these three functions?

a.Sensory input, motor output, integration
b.Motor output, integration, sensory input
c.Sensory input, integration, motor output
d.Integration, sensory input, motor output

c.Sensory input, integration, motor output

1.The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________.

a.resting period
b.repolarization
c.depolarization
d.absolute refractory period

d.absolute refractory period

2.The part of a neuron that conducts impulses away from its cell body is called a(n) ________.

a.axon
b.dendrite
c.neurolemma
d.Schwann cell

a.axon

3.Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials?

a.mechanically gated channel
b.voltage-gated channel
c.leakage channel
d.ligand-gated channel

b.voltage-gated channel

4.An impulse from one nerve cell is communicated to another nerve cell via the ________.

a.cell body
b.synapse
c.receptor
d.effector

b.synapse

5.The substance released at axon terminals to propagate a nervous impulse is called a(n) ________.

a.ion
b.cholinesterase
c.neurotransmitter
d.biogenic amine

c.neurotransmitter

6.What area of a nerve cell carries impulses towards the nerve cell body?

a.dendrite
b.neurolemma
c.axon
d.nucleus

a.dendrite

7.Which one (1) of the following is NOT a function of myelin?

a.protection of dendrites
b.protection of axons
c.insulation of nerve fibres
d.speed up nerve impulses

a.protection of dendrites

a.sodium channels in the plasma membrane of the nerve cell are closed
b.sodium ions move out of the cell
c.the outside of the nerve cell becomes positively charged
d.the outside of the nerve cell becomes negatively charged

d.the outside of the nerve cell becomes negatively charged

1.The brain stem consists of the which one (1) of the following

a.cerebrum, pons, midbrain, and medulla
b.midbrain, medulla, and pons
c.pons, medulla, cerebellum, and midbrain
d.midbrain only

b.midbrain, medulla, and pons

2.The subarachnoid space lies between what two layers of meninges?

a.arachnoid and epidura
b.arachnoid and pia
c.arachnoid and dura
d.dura and epidura

b.arachnoid and pia

3.The vital centers for the control of heart rate, respiration, and blood pressure are located in which one (1) of the following

a.pons
b.medulla
c.midbrain
d.cerebrum

b.medulla

4.Which one (1) of the following statements best describes the cerebral cortex?

a.motor command center
b.visceral command center
c.executive suite
d.decussation center

c.executive suite

5.A shallow groove on the surface of the cortex is called a ________.

a.sulcus
b.fissure
c.gyrus
d.furrow

a.sulcus

6.Which one (1) of the following statements best describes the hypothalamus.

a.is the thermostat of the body because it regulates temperature
b.is an important auditory and visual relay center
c.has the Pulvinar body as part of its structure
d.mediates sensations

a.is the thermostat of the body because it regulates temperature

7.Ridges of tissue on the surface of the cerebral hemispheres are called ________.

a.gyri
b.sulci
c.fissures
d.Ganglia

a.gyri

8.The frontal lobe is separated from the temporal lobe by the ________.

a.longitudinal fissure
b.lateral sulcus
c.central sulcus
d.cranial fossa

b.lateral sulcus

a.corresponds to Brodmann's area 8
b.is usually found in the right hemisphere
c.serves the recognition of complex objects
d.is considered a motor speech area

d.is considered a motor speech area

10.The brain area that regulates activities that control the state of wakefulness or alertness of the cerebral cortex is the ________.

a.thalamus
b.reticular formation
c.pyramids
d.limbic system

b.reticular formation

11.Which of the following is not a function of the CSF?

a.reduction of brain weight
b.protection from blows
c.nourishment of the brain
d.initiation of some nerve impulses

d.initiation of some nerve impulses

12.Loss of ability to perform skilled motor activities such as piano playing, with no paralysis or weakness in specific muscles, might suggest damage to which one (1) of the following.

a.spinal cord
b.premotor cortex
c.primary motor cortex
d.rubrospinal tracts

b.premotor cortex

13.Cerebrospinal fluid is found in the space under which one (1) of the following?

a.periosteal layer of dura mater
b.meningeal layer of dura mater
c.arachnoid mater
d.pia mater

c.arachnoid mater

14.What vessel does the blood circulating the brain drain into?

a.jugular vein
b.carotid artery
c.jugular artery
d.carotid vein

a.jugular vein

15.Blockage to the flow of cerebrospinal fluid may result in which one (1) of the following conditions?

a.paraplegia
b.encephalitis
c.hydrocephalus
d.meningitis

c.hydrocephalus

16.What is the name of the deep groove that separates the two (2) hemispheres of the brain?

a.longitudinal fissure
b.transverse cerebral fissure
c.central sulcus
d.lateral sulcus

a.longitudinal fissure

17.What is the name of the groove that separates the frontal lobe from the parietal lobe of the brain?

a.longitudinal fissure
b.transverse cerebral fissure
c.central sulcus
d.lateral sulcus

c.central sulcus

18.Which one (1) of the following BEST describes the structure of the cerebral cortex? It contains nerve cells:

a.with unmyelinated axons
b.with myelinated axons
c.without dendrites
d.without a cell body

a.with unmyelinated axons

19.In which lobe of the brain is the primary motor area (cortex) located?

a.temporal
b.occipital
c.parietal
d.frontal

d.frontal

20.In which lobe of the brain is the primary somatosensory area (cortex) located?

a.temporal
b.occipital
c.parietal
d.frontal

c.parietal

21.Which one (1) of the following BEST describes the premotor cortex of the brain? It controls:

a.muscles involved in speech
b.voluntary eye movements
c.repetitious motor skills
d.muscles involved in hearing

c.repetitious motor skills

22.In which lobe of the brain is the visual sensory area (cortex) located?

a.temporal
b.occipital
c.parietal
d.frontal

b.occipital

23.What is the function of the cerebral white matter of the brain?

a.starting and stopping movements
b.monitoring movements
c.communication between cerebral cortex areas
d.inhibiting unnecessary movements

c.communication between cerebral cortex areas

24.What is the function of the thalamus in the diencephalon of the brain?

a.controlling the endocrine system
b.maintaining body homeostasis
c.sorting and editing information to send to cerebral cortex areas
d.inhibiting unnecessary movements

c.sorting and editing information to send to cerebral cortex areas

25.What is the function of the pons in the brain stem?

a.coordination of breathing
b.control of involuntary functions
c.control of eye movement
d.coordination of balance

a.coordination of breathing

1.Which of the choices below describes the Autonomic Nervous System (ANS)?

a.motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands
b.motor fibers that conduct nerve impulses from the CNS to skeletal muscles
c.sensory neurons that convey information from somatic receptors in the head, body wall, and limbs and from receptors from the special senses of vision, hearing, taste, and smell to the CNS
d.sensory and motor neurons that supply the digestive tract

a.motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands

.Which of the following is not a function of the autonomic nervous system?

a.innervation of smooth muscle of the digestive tract
b.innervation of cardiac muscle
c.innervation of glands
d.innervation of skeletal muscle

d.innervation of skeletal muscle

Problems in balance may follow trauma to which nerve?

a.abducens
b.vestibulocochlear
c.trigeminal
d.Accessory

b.vestibulocochlear

4.A patient who received a blow to the side of the skull exhibits the following signs and symptoms on that side of the face: he is unable to close his eye, and the corner of his mouth droops. Which cranial nerve has been damaged?

a.facial
b.glossopharyngeal
c.hypoglossal
d.Accessory

a.facial

5.Which of the following does not describe the ANS?

a.a system of motor neurons that innervates smooth and cardiac muscle and glands
b.a system of motor neurons that innervates all muscle cells
c.involuntary nervous system
d.general visceral motor system

b.a system of motor neurons that innervates all muscle cells

6.Preparing the body for the "fight-or-flight" response is the role of the ________.

a.sympathetic nervous system
b.Cerebrum
c.parasympathetic nervous system
d.somatic nervous system

a.sympathetic nervous system

7.The "resting and digesting" division of the autonomic nervous system is the ________.

a.parasympathetic division
b.sympathetic division
c.somatic division
d.peripheral nervous system

a.parasympathetic division

8.Which of these effectors is not directly controlled by the autonomic nervous system?

a.smooth muscle
b.cardiac muscle
c.skeletal muscle
d.most glands

c.skeletal muscle

9.How many cervical spinal nerves are there in the human body?

a.12
b.8
c.5
d.1

b.8

10.The sympathetic and parasympathetic nervous systems are subdivisions of which nervous system?

a.central
b.voluntary
c.autonomic
d.somatic

c.autonomic

11.Which one (1) of the following statements BEST describes the somatic nervous system?

a.contains visceral motor nerve cells
b.conducts impulses from the CNS to cardiac muscles
c.conducts impulses from the CNS to smooth muscles
d.referred to as the voluntary nervous system

d.referred to as the voluntary nervous system

12.Which one (1) of the following is NOT innervated by the autonomic nervous system?

a.smooth muscle of the digestive tract
b.cardiac muscle
c.glands
d.skeletal muscle

d.skeletal muscle

13.Which one (1) of the following would be a result of parasympathetic nervous system stimulation?

a.stimulation of dilator pupillae muscles to dilate pupil
b.stimulation of sweat glands
c.stimulation of arrector pili muscles attached to hair follicles resulting in „goose bumps‟
d.constriction of bronchioles in the lungs

d.constriction of bronchioles in the lungs

14.What types of nerve cells transmit impulses from the periphery of the body to the central nervous system?

a.motor (efferent)
b.sensory (afferent)
c.associated
d.periphery

b.sensory (afferent)

15.Nerves that carry impulses toward the CNS only are ________.

a.sensory (afferent) nerves
b.motor (efferent) nerves
c.association nerves
d.mixed nerves

a.sensory (afferent) nerves

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