Chapter 12 MCQ From Textbook

Question 1

Which of the following cavities contains a component of the central nervous system?
a. abdominal
b. pelvic
c. cranial
d. thoracic

Answer 1

C) Cranial

Question 2

Which structure predominates in the white matter of the brain?
a. myelinated axons
b. neuronal cell bodies
c. ganglia of the parasympathetic nerves
d. bundles of dendrites from the enteric nervous
system

Answer 2

a) Myelinated Axons

Question 3

Which part of a neuron transmits an electrical signal to a target cell?
a. dendrites
b. soma
c. cell body
d. axon

Answer 3

d) Axon

Question 4

Which term describes a bundle of axons in the peripheral nervous system?
a. nucleus b. ganglion c. tract
d. nerve

Answer 4

d) Nerve

Question 5

Which functional division of the nervous system would be responsible for the physiological changes seen during exercise (e.g., increased heart rate and sweating)?
a. somatic
b. autonomic
c. enteric
d. central

Answer 5

b) Autonomic

Question 6

What type of glial cell provides myelin for the axons in a tract?
a. oligodendrocyte
b. astrocyte
c. Schwann cell
d. satellite cell

Answer 6

a) Oligodendrocyte

Question 7

Which part of a neuron contains the nucleus?

Answer 7

Soma (Cell Body)

Question 8

Which of the following substances is least able to cross the blood-brain barrier?
a. water
b. sodium ions
c. glucose
d. white blood cells

Answer 8

d) White Blood Cells

Question 9

What type of glial cell is the resident macrophage behind the blood-brain barrier?
a. microglia
b. astrocyte
c. Schwann cell
d. satellite cell

Answer 9

a) Microglia

Question 10

What two types of macromolecules are the main components of myelin?
a. carbohydrates and lipids
b. proteins and nucleic acids
c. lipids and proteins
d. carbohydrates and nucleic acids

Answer 10

c) Lipids and Proteins

Question 11

If a thermoreceptor is sensitive to temperature sensations, what would a chemoreceptor be sensitive to?
a. light
b. sound
c. molecules d. vibration

Answer 11

c) Molecules

Question 12

Which of these locations is where the greatest level of integration is taking place in the example of testing the temperature of the shower?
a. skeletal muscle
b. spinal cord
c. thalamus
d. cerebral cortex

Answer 12

d) Cerebral Cortex

Question 13

How long does all the signaling through the sensory pathway, within the central nervous system, and through the motor command pathway take?
a. 1 to 2 minutes
b. 1 to 2 seconds
c. fraction of a second
d. varies with graded potential

Answer 13

c) Fraction of a second

Question 14

What is the target of an upper motor neuron?

Answer 14

Lower motor neuron

Question 15

What ion enters a neuron causing depolarization of the cell membrane?
a. sodium
b. chloride
c. potassium
d. phosphate

Answer 15

a) Sodium

Question 16

Voltage-gated Na+ channels open upon reaching what state?
a. resting potential
b. threshold
c. repolarization
d. overshoot

Answer 16

b) Threshold

Question 17

What does a ligand-gated channel require in order to open?
a. increase in concentration of Na+ ions
b. binding of a neurotransmitter
c. increase in concentration of K+ ions
d. depolarization of the membrane

Answer 17

b) Binding of a neurotransmitter.

Question 18

What does a mechanically gated channel respond to?
a. physical stimulus
b. chemical stimulus
c. increase in resistance
d. decrease in resistance

Answer 18

a) Physical stimulus.

Question 19

Which of the following voltages would most likely
be measured during the relative refractory period?
a. +30 mV
b. 0 mV
c. -45 mV
d. -80 mv

Answer 19

c) -45mV

Question 20

Which of the following is probably going to propagate an action potential fastest?
a. a thin, unmyelinated axon
b. a thin, myelinated axon
c. a thick, unmyelinated axon
d. a thick, myelinated axon

Answer 20

d) A thick, myelinated axon.

Question 21

How much of a change in the membrane potential is necessary for the summation of postsynaptic potentials to result in an action potential being generated?
a. +30 mV b. +15 mV c. +10 mV d. -15 mV

Answer 21

b) +15mV

Question 22

A channel opens on a postsynaptic membrane that causes a negative ion to enter the cell. What type of graded potential is this?
a. depolarizing
b. repolarizing
c. hyperpolarizing d. non-polarizing

Answer 22

c) Hyperpolarizing Graded Potential.

Question 23

What neurotransmitter is released at the neuromuscular junction?
a. norepinephrine b. serotonin
c. dopamine
d. acetylcholine

Answer 23

d) Acetylcholine.

Question 24

What type of receptor requires an effector protein to initiate a signal?
a. biogenic amine
b. ionotropic receptor
c. cholinergic system
d. metabotropic receptor

Answer 24

d) Metabotropic Receptor

Question 25

Which of the following neurotransmitters is associated with inhibition exclusively?
a. GABA
b. acetylcholine c. glutamate
d. norepinephrine

Answer 25

a) GABA