a cervical and lumbar enlargement.

a core of gray matter surrounded by white matter.

a cervical and lumbar enlargement.

a core of gray matter surrounded by white matter.

A&P 1 - Nervous System I & II

Question 1

Question

The meninges consist of

Answer

the brain and spinal cord.
the membranes that delineate all of the major brain parts.
the pia mater, arachnoid mater, and dura mater.
nerve tracts that run up and down the spinal cord.

Question 2

Question

The ____________ is the thin meninx attached to the surface of the brain, containing many nerves and blood vessels.

Answer

dura mater
arachnoid mater
pia mater

Question 3

Question

The fourth ventricle is in the

Answer

midline of the brain, beneath the corpus callosum.
right cerebral hemisphere.
brainstem.
left cerebral hemisphere.

Question 4

Question

When the flexor muscles of one arm contract in a withdrawal reflex, the extensor muscles of the other arm contract. This phenomenon is called

Answer

crossed extensor reflex.
flexor extensor reflex.
crossed flexor reflex.

Question 5

Question

The spinothalamic tract conducts impulses

Answer

up the spinal cord to the thalamus.
down the spinal cord from the thalamus.
that stimulate skeletal muscles.

Question 6

Question

The spinal cord has

Answer

31 segments.
a cervical and lumbar enlargement.
a core of gray matter surrounded by white matter.
all of the above.

Question 7

Question

The spinal cord has

Answer

31 segments.
a cervical and lumbar enlargement.
a core of gray matter surrounded by white matter.
all of the above.

Question 8

Question

The part of the brain that coordinates voluntary muscular movements is the

Answer

corpus callosum.
brainstem.
cerebellum.
cerebrum.

Question 9

Question

The cytoplasmic extensions that, together with the cell body, provide the main receptive surfaces for neurons are

Answer

chromatophilic substance (Nissl bodies).
dendrites.
neurofibrils.
axons.

Question 10

Question

Masses of myelinated nerve fibers appear

Answer

brown
gray
white
transparent

Question 11

Question

Most of the neurons in the brain and spinal cord are

Answer

bipolar.
nonpolar.
multipolar.
unipolar

Question 12

Question

Which of the following cells is only found in the PNS?

Answer

Astrocyte
Microglial cell
Oligodendrocyte
Schwann cell

Question 13

Question

Dendrites on unipolar neurons are parts of

Answer

sensory neurons.
efferent neurons.
interneurons.
motor neurons.

Question 14

Question

An action potential is triggered if

Answer

EPSPs overpower IPSPs.
IPSPs overpower EPSPs.
chloride channels open.
the membrane hyperpolarizes.

Question 15

Question

The types of neurons that are organized into neuronal pools are

Answer

interneurons.
intraneurons.
Schwann cells.

Question 16

Question

Diverging axons amplify an impulse by

Answer

contacting many neurons.
returning the impulse to the neuron of origin.
splitting into multiple axons.
stimulating themselves.

Question 17

Question

The brain and spinal cord comprise the central nervous system.

Answer

True
False

Question 18

Question

What is the correct sequence of events along an axon that follows a membrane reaching threshold potential? 1. The membrane depolarizes. 2. Sodium channels open and sodium ions diffuse inward. 3. The membrane repolarizes. 4. Potassium channels open and potassium ions diffuse outward.

Answer

4, 1, 3, 2
3, 2, 4, 1
2, 1, 4, 3
1, 2, 4, 3

Next up

A&P 1 - Nervous System I & II

Description

Resource summary

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

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	Created by Veronica Cannon about 10 years ago