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The substance that is released at axonal endings to propagate a nervous impulse is called:
Question 1 options:

an ion

nerve glue

a neurotransmitter

the sodium-potassium pump

an action potential
Question 2 (1 point) 

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The duration of a nerve impulse is approximately
Question 2 options:

one second

a tenth of a second

a microsecond

a millisecond

a fifth of a second
Question 3 (1 point) 

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Which of the following is NOT true of white and grey matter?
Question 3 options:

White matter contains myelinated nerve fibers ascending and descending in tracts

Cell bodies of motor neurons lie in central gray matter of the spinal cord

The amount of white matter decreases as you ascend the spinal cord

White matter surrounds grey matter in the spinal cord
Question 4 (1 point) 

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The resting membrane potential is:
Question 4 options:

-70 mV

30 mV

55 mV

0 mV

-50 mV
Question 5 (1 point) 

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Which type of reflex involves skeletal muscles:
Question 5 options:

parasympathetic

sympathetic

autonomic

somatic

visceral
Question 6 (1 point) 

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The neuroglial cell involved in the blood brain barrier is the
Question 6 options:

astrocyte

oligodendrocyte

microglia

satellite glia

ependymal cell
Question 7 (1 point) 

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Which nervous system subdivision is a chain of two motor neurons consisting of a preganglion and a postganglionic neuron:
Question 7 options:

somatic

central

autonomic

visceral

sensory
Question 8 (1 point) 

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The function of the olfactory nerve concerns:
Question 8 options:

hearing

vision

chewing

smell

eye movement
Question 9 (1 point) 

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The cranial nerve that innervates the abdominal organs is the
Question 9 options:

hypoglossal (XII)

accessory (XI)

vagus (X)

abducens (VI)

olfactory (I)
Question 10 (1 point) 

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The thin, web-like structure through which CSF flows is which of the following layers of the meninges?
Question 10 options:

dura mater

arachnoid mater

pia mater

grey matter

white matter
Question 11 (1 point) 

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Neurons that conduct nerve impulses from the receptors to the central nervous system are

Question 11 options:

motor neurons


afferent neurons


interneurons


efferent neurons


association neurons

Question 12 (1 point) 

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Which of the following is NOT true of the parasympathetic nervous system?
Question 12 options:

known as the rest and digest division

known as the craniosacral division

pre- and post-ganglionic cells release acetylcholine only

responds to the 'Es'

shunts blood flow toward digestive tract
Question 13 (1 point) 

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Which of the following is not a type of neuron based on structural classification?
Question 13 options:

multipolar

bipolar

unipolar

interneurons
Question 14 (1 point) 

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Neurons that carry information from the central nervous system to skeletal muscles are:
Question 14 options:

sensory

visceral motor

somatic motor

interneurons

parasympathetic
Question 15 (1 point) 

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The Schwann cell forms a myelin sheath around the:
Question 15 options:

dendrites

cell body

nucleus

axon

nodes of Ranvier
Question 16 (1 point) 

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In contrast to the somatic nervous system, the autonomic nervous system:
Question 16 options:

has two motor neurons

has two afferent neurons

stimulates its effector cells

has both afferent and efferent fibers

has centers in the brain and spinal cord
Question 17 (1 point) 

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The diffusion of potassium ions out of a neuron causes it to experience:
Question 17 options:

an action potential

depolarization

repolarization

a graded potential

a nerve impulse
Question 18 (1 point) 

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Which of the following is NOT true of the sympathetic nervous system?
Question 18 options:

Responds to the 'Es'

Known as the fight or flight division

Known as the thoracolumbar division

Inreases heart rate and breathing

Decreases blood flow to muscles
Question 19 (1 point) 

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Compared to unmyleninated axons, myelinated axons
Question 19 options:

conduct impulses faster

conduct impulses more often

conduct impulses slower

produce larger action potentials

produce longer lasting action potentials
Question 20 (1 point) 

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The thalamus is found in the region of the brain known as the
Question 20 options:

brain stem

diencephalon

cerebrum

cerebellum

hypothalamus

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