Question 1

Which of the following neuroglia are NOT found in the CNS?

Accepted Answer

A)  Schwann cells 
B)  Oligodendrocytes 
C)  Astrocytes 
D)  Ependymal cells 
A)  Schwann cells 
B)  Oligodendrocytes 
C)  Astrocytes 
D)  Ependymal cells A

Question 2

The closing of voltage-gated Na+ inactivation channels begins a period called

Accepted Answer

A)  Polarization 
B)  Depolarization 
C)  Repolarization 
D)  Hyperpolarization 
A)  Polarization 
B)  Depolarization 
C)  Repolarization 
D)  Hyperpolarization C

Question 3

Leak channels allow potassium ions to flow back and forth across the plasma membrane.

Accepted Answer

A) True 
 B)False  True

Question 4

A bundle of axons and their connective tissue sheaths are called

Accepted Answer

A)  Receptors 
B)  Nerves 
C)  Ganglia 
D)  Effectors 
A)  Receptors 
B)  Nerves 
C)  Ganglia 
D)  Effectors

Question 5

Schwann cells form the myelin sheath around portions of several axons, while oligodendrocytes form the myelin sheath around a portion of one axon.

Accepted Answer

A) True 
 B)False

Question 6

Which neuroglial cells are the most abundant in the CNS?

Accepted Answer

A)  Microglia 
B)  Ependymal cells 
C)  Oligodendrocytes 
D)  Astrocytes 
A)  Microglia 
B)  Ependymal cells 
C)  Oligodendrocytes 
D)  Astrocytes

Question 7

Which type of neuroglial cells help to produce and circulate cerebrospinal fluid?

Accepted Answer

A)  Microglia 
B)  Ependymal cells 
C)  Oligodendrocytes 
D)  Astrocytes 
A)  Microglia 
B)  Ependymal cells 
C)  Oligodendrocytes 
D)  Astrocytes

Question 8

Which of the following is NOT true of satellite cells?

Accepted Answer

A)  Form the myelin sheath around neuron cell bodies 
B)  Absorb heavy metal poisons 
C)  Surround cell bodies of sensory ganglia 
D)  Support and nourish neuron cell bodies 
A)  Form the myelin sheath around neuron cell bodies 
B)  Absorb heavy metal poisons 
C)  Surround cell bodies of sensory ganglia 
D)  Support and nourish neuron cell bodies

Question 9

What ion is found in higher concentration on the inside of a nerve cell?

Accepted Answer

A)  Na+ 
B)  Cl- 
C)  Ca2+ 
D)  K+ 
A)  Na+ 
B)  Cl- 
C)  Ca2+ 
D)  K+

Question 10

A neuron pathway that cycles among several neurons in a positive-feedback type mechanism is called a(an)

Accepted Answer

A)  Oscillating circuit 
B)  Convergent pathway 
C)  Parallel pathway 
D)  Divergent pathway 
A)  Oscillating circuit 
B)  Convergent pathway 
C)  Parallel pathway 
D)  Divergent pathway

Question 11

Which type of nerve fiber conducts impulses the fastest?

Accepted Answer

A)  Type A 
B)  Type B 
C)  Type C 
D)  Type D 
A)  Type A 
B)  Type B 
C)  Type C 
D)  Type D

Question 12

Bipolar neurons are found extensively in the CNS.

Accepted Answer

A) True 
 B)False

Question 13

What type of membrane channels open and close in response to small voltage changes across the plasma membrane?

Accepted Answer

A)  Na-K pump 
B)  Leak channels 
C)  Ligand-gated ion channels 
D)  Voltage-gated ion channels 
A)  Na-K pump 
B)  Leak channels 
C)  Ligand-gated ion channels 
D)  Voltage-gated ion channels

Question 14

The output part of a neuron is the

Accepted Answer

A)  Dendrite 
B)  Nissl substance 
C)  Axon 
D)  Soma 
A)  Dendrite 
B)  Nissl substance 
C)  Axon 
D)  Soma

Question 15

Another term for the sensory division of the PNS is the afferent division.

Accepted Answer

A) True 
 B)False

Question 16

The stronger the stimulus, the higher the frequency of action potential production.

Accepted Answer

A) True 
 B)False

Question 17

The somatic motor nervous system transmits impulses form the CNS to smooth muscles.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is NOT true about changes in the membrane potential?

Accepted Answer

A)  An increase in the movement of potassium out of the cell creates a hyperpolarization 
B)  An increase in the movement of calcium ions into the cell creates a hyperpolarization 
C)  An increase in the movement of sodium ions into the cell causes depolarization 
D)  An increase in the movement of chloride ions into the cell causes hyperpolarization 
A)  An increase in the movement of potassium out of the cell creates a hyperpolarization 
B)  An increase in the movement of calcium ions into the cell creates a hyperpolarization 
C)  An increase in the movement of sodium ions into the cell causes depolarization 
D)  An increase in the movement of chloride ions into the cell causes hyperpolarization

Question 19

Astrocytes can limit regeneration of damaged axons in the CNS.

Accepted Answer

A) True 
 B)False

Question 20

What type of membrane channels are nongated and responsible for the permeability of the membrane at rest?

Accepted Answer

A)  Na-K pump 
B)  Leak channels 
C)  Ligand-gated ion channels 
D)  Voltage-gated ion channels 
A)  Na-K pump 
B)  Leak channels 
C)  Ligand-gated ion channels 
D)  Voltage-gated ion channels

Exam 10: Functional Organization of Nervous Tissue

Which of the following neuroglia are NOT found in the CNS?

The closing of voltage-gated Na+ inactivation channels begins a period called

Leak channels allow potassium ions to flow back and forth across the plasma membrane.

A bundle of axons and their connective tissue sheaths are called

Schwann cells form the myelin sheath around portions of several axons, while oligodendrocytes form the myelin sheath around a portion of one axon.

Which neuroglial cells are the most abundant in the CNS?

Which type of neuroglial cells help to produce and circulate cerebrospinal fluid?

Which of the following is NOT true of satellite cells?

What ion is found in higher concentration on the inside of a nerve cell?

A neuron pathway that cycles among several neurons in a positive-feedback type mechanism is called a(an)

Which type of nerve fiber conducts impulses the fastest?

Bipolar neurons are found extensively in the CNS.

What type of membrane channels open and close in response to small voltage changes across the plasma membrane?

The output part of a neuron is the

Another term for the sensory division of the PNS is the afferent division.

The stronger the stimulus, the higher the frequency of action potential production.

The somatic motor nervous system transmits impulses form the CNS to smooth muscles.

Which of the following is NOT true about changes in the membrane potential?

Astrocytes can limit regeneration of damaged axons in the CNS.

What type of membrane channels are nongated and responsible for the permeability of the membrane at rest?

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissues, Glands, and Membranes

Integumentary System

Histology and Physiology of Bones

Anatomy of Bones and Joints

Histology and Physiology of Muscles

Gross Anatomy and Functions of Skeletal Muscles

Central and Peripheral Nervous Systems

Integration of Nervous System Functions

Special Senses

Autonomic Nervous System

Endocrine System

Blood

The Heart

Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System and Body Fluids

Reproductive System

Development and Genetics

Filters

The closing of voltage-gated Na⁺ inactivation channels begins a period called