Question 1

Axons terminate in a series of fine extensions known as

Accepted Answer

A)  synapses. 
B)  dendrites. 
C)  telodendria. 
D)  knobs. 
E)  collaterals. 
A)  synapses. 
B)  dendrites. 
C)  telodendria. 
D)  knobs. 
E)  collaterals.

Question 2

Figure 11- 2 The Nerve Action Potential
Use Figure 11- 2 to answer the following questions:
-Neurotransmitter for release is stored in synaptic

Accepted Answer

A)  neurosomes. 
B)  knobs. 
C)  telodendria. 
D)  vesicles. 
E)  mitochondria. 
A)  neurosomes. 
B)  knobs. 
C)  telodendria. 
D)  vesicles. 
E)  mitochondria.

Question 3

Figure 11- 1 The Neuron
Use Figure 11- 1 to answer the following questions:
-The site of intercellular communication between neurons is the

Accepted Answer

A)  synapse. 
B)  telodendria. 
C)  hillock. 
D)  synaptic knob. 
E)  collateral. 
A)  synapse. 
B)  telodendria. 
C)  hillock. 
D)  synaptic knob. 
E)  collateral.

Question 4

The buildup of depolarization when EPSPs arrive in rapid succession is called__________summation.

Accepted Answer

The answer of The buildup of depolarization when EPSPs arrive...

Question 5

If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential?

Accepted Answer

A)  The inside of the membrane will become more positive. 
B)  The membrane will become depolarized. 
C)  There will be almost no effect on transmembrane potential. 
D)  The inside of the membrane will become more negative. 
E)  both B and D 
A)  The inside of the membrane will become more positive. 
B)  The membrane will become depolarized. 
C)  There will be almost no effect on transmembrane potential. 
D)  The inside of the membrane will become more negative. 
E)  both B and D

Question 6

The period during which an excitable membrane cannot respond to further stimulation is the_____________ .

Accepted Answer

absolute r

Question 7

The smallest neuroglia of the CNS are the

Accepted Answer

A)  oligodendrocytes. 
B)  ependymal cells. 
C)  microglia. 
D)  astrocytes. 
E)  none of the above 
A)  oligodendrocytes. 
B)  ependymal cells. 
C)  microglia. 
D)  astrocytes. 
E)  none of the above

Question 8

Puffer fish poison blocks voltage- gated sodium channels like a cork. What effect would this neurotoxin have on the function of neurons?

Accepted Answer

A)  Action potentials would lack a repolarization phase. 
B)  Neurons would depolarize more rapidly. 
C)  The axon would be unable to generate action potentials. 
D)  The absolute refractory period would be shorter than normal. 
E)  None, because the chemically gated sodium channels would still function. 
A)  Action potentials would lack a repolarization phase. 
B)  Neurons would depolarize more rapidly. 
C)  The axon would be unable to generate action potentials. 
D)  The absolute refractory period would be shorter than normal. 
E)  None, because the chemically gated sodium channels would still function.

Question 9

A shift of the resting transmembrane potential toward 0 mV is called__________

Accepted Answer

The answer of A shift of the resting transmembrane potential...

Question 10

Which of the following are a type of glial cell found in the peripheral nervous system?

Accepted Answer

A)  satellite cells 
B)  oligodendrocytes 
C)  ependymal cells 
D)  astrocytes 
E)  microglia 
A)  satellite cells 
B)  oligodendrocytes 
C)  ependymal cells 
D)  astrocytes 
E)  microglia

Question 11

The part of the peripheral nervous system that carries sensory information to the CNS is designated

Accepted Answer

A)  somatic. 
B)  efferent. 
C)  motor. 
D)  autonomic. 
E)  afferent. 
A)  somatic. 
B)  efferent. 
C)  motor. 
D)  autonomic. 
E)  afferent.

Question 12

The cytoskeleton of the perikaryon contains which of the following?

Accepted Answer

A)  neurofibrils 
B)  neurotubules 
C)  neurofilaments 
D)  B and C only 
E)  A, B, and C 
A)  neurofibrils 
B)  neurotubules 
C)  neurofilaments 
D)  B and C only 
E)  A, B, and C

Question 13

Most CNS neurons lack centrioles. This observation explains

Accepted Answer

A)  why CNS neurons grow such long axons. 
B)  why CNS neurons cannot regenerate. 
C)  the ability of neurons to communicate with each other. 
D)  the ability of neurons to produce a resting potential. 
E)  the ability of neurons to generate an action potential. 
A)  why CNS neurons grow such long axons. 
B)  why CNS neurons cannot regenerate. 
C)  the ability of neurons to communicate with each other. 
D)  the ability of neurons to produce a resting potential. 
E)  the ability of neurons to generate an action potential.

Question 14

Type ______ fibers have the largest diameter axons.

Accepted Answer

A)  C 
B)  F 
C)  A 
D)  B 
E)  S 
A)  C 
B)  F 
C)  A 
D)  B 
E)  S

Question 15

The____________ division carries motor commands to muscles and glands

Accepted Answer

The answer of The____________ division carries motor commands to muscles...

Question 16

The ______nervous system controls the skeletal muscles.

Accepted Answer

A)  autonomic 
B)  sympathetic 
C)  somatic 
D)  afferent 
E)  parasympathetic 
A)  autonomic 
B)  sympathetic 
C)  somatic 
D)  afferent 
E)  parasympathetic

Question 17

In which of the following would the rate of impulse conduction be the greatest?

Accepted Answer

A)  a nonmyelinated fiber of 10- µm diameter 
B)  a myelinated fiber of 1- µm diameter 
C)  a nonmyelinated fiber of 20- µm diameter 
D)  a myelinated fiber of 10- µm diameter 
E)  the same in all because of the all- or- none principle 
A)  a nonmyelinated fiber of 10- µm diameter 
B)  a myelinated fiber of 1- µm diameter 
C)  a nonmyelinated fiber of 20- µm diameter 
D)  a myelinated fiber of 10- µm diameter 
E)  the same in all because of the all- or- none principle

Question 18

__________-neurons are small and have no anatomical features that distinguish dendrites from axons.

Accepted Answer

A)  Multipolar 
B)  Anaxonic 
C)  Bipolar 
D)  Unipolar 
E)  none of the above 
A)  Multipolar 
B)  Anaxonic 
C)  Bipolar 
D)  Unipolar 
E)  none of the above

Question 19

How does blocking retrograde axoplasmic transport in an axon affect the activity of a neuron?

Accepted Answer

A)  The neuron becomes unable to produce neurotransmitters. 
B)  The soma becomes unable to export products to the synaptic knobs. 
C)  The neuron becomes unable to produce action potentials. 
D)  The neuron becomes unable to depolarize when stimulated. 
E)  The soma becomes unable to respond to changes in the distal end of the axon. 
A)  The neuron becomes unable to produce neurotransmitters. 
B)  The soma becomes unable to export products to the synaptic knobs. 
C)  The neuron becomes unable to produce action potentials. 
D)  The neuron becomes unable to depolarize when stimulated. 
E)  The soma becomes unable to respond to changes in the distal end of the axon.

Question 20

Opioids relieve pain by blocking the release of

Accepted Answer

A)  substance Q. 
B)  substance X. 
C)  substance O. 
D)  substance P. 
E)  none of the above 
A)  substance Q. 
B)  substance X. 
C)  substance O. 
D)  substance P. 
E)  none of the above

Exam 11: Neural Tissue

Axons terminate in a series of fine extensions known as

Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -Neurotransmitter for release is stored in synaptic

Figure 11- 1 The Neuron Use Figure 11- 1 to answer the following questions: -The site of intercellular communication between neurons is the

The buildup of depolarization when EPSPs arrive in rapid succession is called__________summation.

If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential?

The period during which an excitable membrane cannot respond to further stimulation is the_____________ .

The smallest neuroglia of the CNS are the

Puffer fish poison blocks voltage- gated sodium channels like a cork. What effect would this neurotoxin have on the function of neurons?

A shift of the resting transmembrane potential toward 0 mV is called__________

Which of the following are a type of glial cell found in the peripheral nervous system?

The part of the peripheral nervous system that carries sensory information to the CNS is designated

The cytoskeleton of the perikaryon contains which of the following?

Most CNS neurons lack centrioles. This observation explains

Type ______ fibers have the largest diameter axons.

The____________ division carries motor commands to muscles and glands

The ______nervous system controls the skeletal muscles.

In which of the following would the rate of impulse conduction be the greatest?

__________-neurons are small and have no anatomical features that distinguish dendrites from axons.

How does blocking retrograde axoplasmic transport in an axon affect the activity of a neuron?

Opioids relieve pain by blocking the release of

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Skeleton

Articulations

Muscle Tissue

The Muscular System

The Spinal Cord, Spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphoid System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

Filters