Question 1

If the permeability of a resting axon to sodium ion increases,

Accepted Answer

A) the membrane potential will repolarize. 
B) the membrane potential will hyperpolarize. 
C) inward movement of sodium ion will increase. 
D) outward movement of sodium ion will decrease. 
E) inward movement of sodium will increase and the membrane will depolarize. 
A) the membrane potential will repolarize. 
B) the membrane potential will hyperpolarize. 
C) inward movement of sodium ion will increase. 
D) outward movement of sodium ion will decrease. 
E) inward movement of sodium will increase and the membrane will depolarize.

Question 2

IPSPs (inhibitory postsynaptic potentials)

Accepted Answer

A) are local depolarizations. 
B) are local hyperpolarizations. 
C) increase membrane permeability to sodium ions. 
D) block the efflux of potassium ions. 
E) block the efflux of calcium ions. 
A) are local depolarizations. 
B) are local hyperpolarizations. 
C) increase membrane permeability to sodium ions. 
D) block the efflux of potassium ions. 
E) block the efflux of calcium ions.

Question 3

The ________ nervous system is composed of the brain and spinal cord.

Accepted Answer

A) autonomic 
B) peripheral 
C) central 
D) efferent 
E) afferent 
A) autonomic 
B) peripheral 
C) central 
D) efferent 
E) afferent

Question 4

Opening of sodium channels in the axon membrane causes

Accepted Answer

A) depolarization. 
B) repolarization. 
C) hyperpolarization. 
D) increased negative charge inside the membrane. 
E) inhibition. 
A) depolarization. 
B) repolarization. 
C) hyperpolarization. 
D) increased negative charge inside the membrane. 
E) inhibition.

Question 5

The myelin sheath that covers many CNS axons is formed by

Accepted Answer

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

Question 6

Figure 12-1 The Neuron
Use Figure 12-1 to answer the following questions:
-The structure labeled "2" is a

Accepted Answer

A) soma. 
B) dendrite. 
C) initial segment. 
D) perikaryon. 
E) axon. 
A) soma. 
B) dendrite. 
C) initial segment. 
D) perikaryon. 
E) axon.

Question 7

Which of the following types of nerve fiber possesses the fastest speed of impulse propagation?

Accepted Answer

A) type A 
B) type B 
C) type C 
D) type D 
E) type E 
A) type A 
B) type B 
C) type C 
D) type D 
E) type E

Question 8

Clusters of RER and free ribosomes in neurons are called

Accepted Answer

A) neurofilaments. 
B) neurofibrils. 
C) perikaryon. 
D) Nissl bodies. 
E) microglia. 
A) neurofilaments. 
B) neurofibrils. 
C) perikaryon. 
D) Nissl bodies. 
E) microglia.

Question 9

The presence of ________ dramatically increases the speed at which an action potential moves along an axon.

Accepted Answer

The answer of The presence of ________ dramatically increases the...

Question 10

Neurons that are rare,small,and lack features that distinguish dendrites from axons are called

Accepted Answer

A) anaxonic. 
B) unipolar. 
C) bipolar. 
D) tripolar. 
E) multipolar. 
A) anaxonic. 
B) unipolar. 
C) bipolar. 
D) tripolar. 
E) multipolar.

Question 11

The axoplasm of the axon contains which of the following?

Accepted Answer

A) neurotubules 
B) mitochondria 
C) vesicles 
D) neurofibrils 
E) All of the answers are correct. 
A) neurotubules 
B) mitochondria 
C) vesicles 
D) neurofibrils 
E) All of the answers are correct.

Question 12

In a(n)________ synapse,current flows directly between cells.

Accepted Answer

The answer of In a(n)________ synapse,current flows directly between cells....

Question 13

A neuron that receives neurotransmitter from another neuron is called

Accepted Answer

A) the presynaptic neuron. 
B) the motor neuron. 
C) an oligodendrocyte. 
D) an interneuron. 
E) the postsynaptic neuron. 
A) the presynaptic neuron. 
B) the motor neuron. 
C) an oligodendrocyte. 
D) an interneuron. 
E) the postsynaptic neuron.

Question 14

The most abundant class of neuron in the central nervous system is

Accepted Answer

A) anaxonic. 
B) bipolar. 
C) multipolar. 
D) pseudopolar. 
E) unipolar. 
A) anaxonic. 
B) bipolar. 
C) multipolar. 
D) pseudopolar. 
E) unipolar.

Question 15

Cholinergic synapses release the neurotransmitter

Accepted Answer

A) norepinephrine. 
B) adrenalin. 
C) serotonin. 
D) acetylcholine. 
E) GABA. 
A) norepinephrine. 
B) adrenalin. 
C) serotonin. 
D) acetylcholine. 
E) GABA.

Question 16

Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma is called ________ degeneration.

Accepted Answer

A) neural 
B) central 
C) peripheral 
D) Wallerian 
E) conduction 
A) neural 
B) central 
C) peripheral 
D) Wallerian 
E) conduction

Question 17

Neurons that have one axon and one dendrite,with the soma in between,are called

Accepted Answer

A) anaxonic. 
B) unipolar. 
C) bipolar. 
D) tripolar. 
E) multipolar. 
A) anaxonic. 
B) unipolar. 
C) bipolar. 
D) tripolar. 
E) multipolar.

Question 18

The rabies virus travels to the CNS via

Accepted Answer

A) anterograde axoplasmic transport. 
B) retrograde axoplasmic transport. 
C) blood vessels. 
D) subcutaneous connective tissue. 
E) cerebrospinal fluid. 
A) anterograde axoplasmic transport. 
B) retrograde axoplasmic transport. 
C) blood vessels. 
D) subcutaneous connective tissue. 
E) cerebrospinal fluid.

Question 19

The same ________ can have different effects depending on the properties of the ________.

Accepted Answer

A) neurotransmitter; receptor 
B) receptor; neurotransmitter 
C) substrate; receptor 
D) hormone; neurotransmitter 
E) propagation; neurotransmitter 
A) neurotransmitter; receptor 
B) receptor; neurotransmitter 
C) substrate; receptor 
D) hormone; neurotransmitter 
E) propagation; neurotransmitter

Question 20

________ monitor the digestive,respiratory,cardiovascular,urinary,and reproductive systems.(Note: Be sure to capitalize the first letter of your answer).

Accepted Answer

The answer of ________ monitor the digestive,respiratory,cardiovascular,urinary,and reproductive systems.(Note: Be...

Exam 12: Neural Tissue

If the permeability of a resting axon to sodium ion increases,

IPSPs (inhibitory postsynaptic potentials)

The ________ nervous system is composed of the brain and spinal cord.

Opening of sodium channels in the axon membrane causes

The myelin sheath that covers many CNS axons is formed by

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -The structure labeled "2" is a

Which of the following types of nerve fiber possesses the fastest speed of impulse propagation?

Clusters of RER and free ribosomes in neurons are called

The presence of ________ dramatically increases the speed at which an action potential moves along an axon.

Neurons that are rare,small,and lack features that distinguish dendrites from axons are called

The axoplasm of the axon contains which of the following?

In a(n)________ synapse,current flows directly between cells.

A neuron that receives neurotransmitter from another neuron is called

The most abundant class of neuron in the central nervous system is

Cholinergic synapses release the neurotransmitter

Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma is called ________ degeneration.

Neurons that have one axon and one dendrite,with the soma in between,are called

The rabies virus travels to the CNS via

The same ________ can have different effects depending on the properties of the ________.

________ monitor the digestive,respiratory,cardiovascular,urinary,and reproductive systems.(Note: Be sure to capitalize the first letter of your answer).

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 Axial Skeleton

The Appendicular Skeleton

Articulations

Muscle Tissue

The Muscular System

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration I: Sensory Pathways and the Somatic Nervous System

Neural Integration Ii: the Autonomic Nervous System and

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

Filters

The same can have different effects depending on the properties of the .