Question 1

Which type of neuronal pathway allows for a stimulus to be transmitted to the most number of cells?

Accepted Answer

A)   Divergent
B)   Convergent
C)   Reverberating
D)   Both "Convergent" and "Reverberating" are correct. A

Question 2

Mr. Miller has been hospitalized for the flu. The flu virus increases membrane permeability to K+. You would expect his cells to ________.

Accepted Answer

A)   depolarize
B)   repolarize
C)   isopolarize
D)   hyperpolarize
E)   hypopolarize D

Question 3

The absolute refractory period ends when

Accepted Answer

A)   inactivation gates of voltage-gated Na+ channels reopen.
B)   activation gates of voltage-gated Na+ channels reopen.
C)   the sodium-potassium pump stops.
D)   voltage-gated K+ channels open.
E)   None of the choices are correct. A

Question 4

Identify the correct sequence of the structures as they are involved in activity at a chemical synapse.

Accepted Answer

A)   Postsynaptic membrane; synaptic cleft; presynaptic terminal
B)   Presynaptic terminal; synaptic cleft; postsynaptic membrane
C)   Synaptic cleft; presynaptic terminal; postsynaptic membrane
D)   Presynaptic terminal; postsynaptic membrane; synaptic cleft

Question 5

The gray matter of the cerebrum is composed of neuron cell bodies and makes up both the ________ and the ________.

Accepted Answer

A)   cortex; deep cerebral nuclei
B)   cortex; white matter
C)   cerebral tracts; cortex

Question 6

Gray matter has little myelination, whereas white matter has abundant myelination.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following will cause the plasma membrane to hyperpolarize when at its resting membrane potential?

Accepted Answer

A)   An inflow of Na+
B)   An inflow of K+
C)   An inflow of Ca2+
D)   An inflow of Cl−
E)   An outflow of Cl−

Question 8

If a neuron is prevented from sending a neurotransmitter across a synapse to another cell, which neuron property is being inhibited?

Accepted Answer

A)   Secretion
B)   Excitability
C)   Conductivity
D)   Permeability

Question 9

The enteric nervous system consists of plexuses within the walls of the ________.

Accepted Answer

A)   brain
B)   spinal cord
C)   digestive tract
D)   urinary bladder

Question 10

Why isn't an action potential transmitted from a postsynaptic membrane to a presynaptic terminal?

Accepted Answer

A)   Presynaptic terminals have no acetylcholine receptors.
B)   Presynaptic neurons do not have a resting membrane potential.
C)   Acetylcholine can only diffuse in one direction across the synaptic cleft.
D)   Synaptic vesicles in the postsynaptic membrane are inactive.
E)   Acetylcholine is destroyed too quickly.

Question 11

Match the term with the correct definition.
-Depolarization

Accepted Answer

A)  Small change in the resting membrane potential confined to a small area
B)  Charge difference across the plasma membrane when the cell is in an unstimulated state
C)  Larger change in resting membrane potential that spreads over entire surface of a cell
D)  Membrane becomes more positive when Na+ diffuse into cell
E)  Return to the resting membrane potential

Question 12

The central nervous system

Accepted Answer

A)   is the site for processing information.
B)   initiates visual and auditory stimuli.
C)   consists of 43 pairs of nerves.
D)   is totally involuntary.
E)   does not interact with the peripheral nervous system.

Question 13

-Identify structure "C" on the neuron.
A) Schwann cell
B) Node of Ranvier
C) Neuron cell body (soma)
D) Dendrites
E) Axon

Accepted Answer

The answer of 
-Identify structure "C" on the neuron.
A) Schwann...

Question 14

A neuron that conducts pain sensations to the central nervous system would be classified as a/an ________.

Accepted Answer

A)   motor neuron
B)   sensory or afferent neuron
C)   efferent neuron
D)   association neuron
E)   interneuron

Question 15

White matter is composed of

Accepted Answer

A)   ganglial sheaths.
B)   bundles of myelinated axons.
C)   collections of nerve cell bodies.
D)   bundles containing both myelinated axons and nerve cell bodies.
E)   collections of unmyelinated axons.

Question 16

Which ion is necessary for the release of neurotransmitter from synaptic vesicles?

Accepted Answer

A)   Cl−
B)   Na+
C)   K+
D)   Ca2+

Question 17

Neurons in the skin that are responsible for detecting pain are ________.

Accepted Answer

A)   apolar
B)   pseudo-unipolar
C)   bipolar
D)   multipolar

Question 18

Neurons arranged in a circular pathway form ________.

Accepted Answer

A)   neuromotor junctions
B)   temporal circuits
C)   reverberating circuits
D)   spatial pathways

Question 19

Gaps or interruptions in the myelin sheath are called ________.

Accepted Answer

A)   internodes
B)   tight junctions
C)   neurofilaments
D)   nodes of Ranvier
E)   gap junctions

Question 20

There are ________ pairs of cranial nerves and ________ pairs of spinal nerves.

Accepted Answer

A)   10; 30
B)   31; 12
C)   12; 31
D)   30; 10
E)   12; 32

Exam 11: Functional Organization of Nervous Tissue