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A&P final exam
Terms in this set (67)
The cytoplasmic extensions that, together with the cell body, provide the main receptive surfaces for neurons are
Whena nerve fiber is polarized, the concentration of
sodium ions are higher on the outside, potassium ions higher on the inside
What produces myelin in the brain and spinal cord
When an action potential passes over the surface of a synaptic knob, the contents of the vesicles are released in response to the presence of
If a neuron receives a series of stimuli whose effect is excitatory but subthreshold, the neuron is more excitable to incoming stimulation than before and is said to be
The expected response to the triceps jerk reflex is
extension of the forearm
A nerve cell membrane may become depolarized as a result of
the sudden opening of leak channels for sodium ions
Which of the following in under voluntary control of the nervous system
Clusters of neuron cell bodies are called
Which of the following cells is not part of the CNS?
When astimulus is sufficently great enough to chenge the membrane potential and propagate an axon potential, it is
The difference in electrical charge between the inside and outside of a resting nerve cell membrane is called the
The additive phenomena by which a series of similar stimuli cause an increasing amount of change in the local membrane potential is called
The part of the brain that functions to coordinate voluntary muscular movement is the
Which of the following is most closely associated with the decaphalon?
Which of the following are generally adrenergic fibers
sympathetic postganglionic fibers
If the area of the cerebral hemisphere corresponding to Broca's area is damaged, what is the result?
motor control of the muscles associated with speech is lost
The primary motor area of the brain are located in the
precentral gyrus of the frontal lobe
The cerebrum is separated from the cerebellum by the
Which of the following is not a function of the hypothalamus
control of postural reflexes
The consequence of cutting the first cranial nerve would be that
you would be unable to smell
Which of the following cranial nerves carries autonomic motor impulses that influence heart rate
A strictly sensory nerve which is also cranial nerve VIII is the
The consequence of sensory nerve fibers crossing over is that the
right hemisphere or the cerebrum receives sensory impulses originating on the left and vice versa
The somatic nervous system consists of nerve fibers that connect the CNS to the ________, whereas the autonomic nervous system consists of fibers that connect the ________.
skin and skeletal muscles; CNS to the visceral organs
Nerve fibers of the ___________ division of the autonomic nervous system arise from the brain stem and the sacral region of the spinal cord.
The interconnected, fluid filled cavities within the brain are called _________.
The part of the brain stem that includes the cardia and vasomotor centers is the ____ ____
are generally stimulated by factors that can cause tissue damage
Which of the following is not a primary taste sensation?
The lens of the eye thickens when the
ciliary muscles contract
Temperature senses employ 2 types of
A sensation is ___________, and projection of a sensation is the _________.
a feeling that results from sensory stimulation; the brain causing it to seem to come from the receptors being stimulated.
Pain receptors differ from other somatic receptors by
adapting very little, if at all.
Pain that feels like it is coming from a part other than the part actually stimulated is called ______ _______.
The ______ ________ connects the middle ear and the pharynx.
The transparent, anterior portion of the eye's outer tunic is called the _______.
The adjustment of the thickness of the lens to make close vision possible is called _______.
Nonsteroid hormones act upon their target cells by causing
the activation of adenylate cyclase
a decrease in the concentration of blood glucose
Which of the following hormones requires a releasing hormone from the hypothalamus for its secretion
The hormone that causes calcium to be deposited in bone is
Various anti-inflammatory drugs, like aspirin, that are used to treat symptoms of rheumatoid arthritis act by inhibiting the production of
Triiodothronine is a hormone secreted by the
The central portion of the adrenal gland is the adrenal
Masses of myelinated nerve fibers appear
Which of the following is a type of neuroglial cell?
Which of the following lists the parts of a reflex arc in the correct sequence
receptor, sensory neuron, interneuron, motor neuron, effector
is faster than propagation on an unmyelinated fiber
If a resting potential becomes more negative, the membrane is said to be
What is the correct sequence of events that follow a threshold potential?
(1)the membrane becomes depolarized
(2)Sodium channels open and sodium ions diffuse inward
(3)the membrane becomes repolarized
(4)potassium channels open and potassium ions diffuse outward
Most neurons in the brain and spinal cord are
Neurons are ____________, whereas neuroglial cells are __________.
structural and functional unit sof the nervous system; accessory cells in the nerve tissue
The process of transmitting a nerve impulse from one neuron to another involves a
nerve impulse stimulating presynaptic axons to release a neurotransmitter into a synaptic cleft
Which if the following cells is only found in the PNS?
Skeltal muscle contration is under the control of the
somatic nervous system
In the case of a subdural hematoma resulting from a blow to the head, blood accumulates between the
dura mater and the arachnoid mater
The structure of the spinal cord can be described as (pick only the ones that apply)
(1)composed of 31 segments
(2)having a cervical and lumbar enlargement, and 2 deep longitudinal grooves
(3)a central core of gray matter that is surrounded by white matter
(4)arachnoid mater and brain
The area of skin supplied by sensory nerve fibers from particular dorsal root is called a
Which of the following terms with accompanying definitions is correct
cerebral cortex: a thin layer of gray matter constituting the outermost portion of the cerbrum
Cerebrospinal fluid is produced by ________ and it functions to _________.
choroid plexuses in the ventricles; protect the brain from blows to the skull
The hearing receptors are most closely associated with the
organ of corti
Which of the following is part of the inner tunic of the eye
Where are the specialized sense found
primarily the head
Target cells for releasing hormones are in the
Where are the hormones secreted by the posterior pituitary made?
ADH and oxycytocin are secreted by
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