Question 1

Neurons in which dendritic and axonal processes are continuous and the soma lies off to one side are called

Accepted Answer

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

Question 2

Neurotransmitters ready for release are stored in synaptic

Accepted Answer

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

Question 3

Which of the following is not involved in creating the resting potential of a neuron?

Accepted Answer

A) diffusion of potassium ions out of the cell 
B) diffusion of sodium ions into the cell 
C) membrane permeability for sodium ions greater than potassium ions 
D) membrane permeability for potassium ions greater than sodium ions 
E) The interior of the plasma membrane has an excess of negative charges. 
A) diffusion of potassium ions out of the cell 
B) diffusion of sodium ions into the cell 
C) membrane permeability for sodium ions greater than potassium ions 
D) membrane permeability for potassium ions greater than sodium ions 
E) The interior of the plasma membrane has an excess of negative charges. C

Question 4

________ neurons are the most common structural class in the CNS.

Accepted Answer

A) Multipolar 
B) Anaxonic 
C) Unipolar 
D) Bipolar 
E) Sensory 
A) Multipolar 
B) Anaxonic 
C) Unipolar 
D) Bipolar 
E) Sensory

Question 5

If acetylcholine (ACh)causes inhibition of a postsynaptic neuron,to what type of membrane channel did the ACh bind?

Accepted Answer

A) mechanically-regulated channel 
B) voltage-regulated sodium channel 
C) voltage-regulated calcium channel 
D) chemically-regulated potassium channel 
E) chemically-regulated sodium channel 
A) mechanically-regulated channel 
B) voltage-regulated sodium channel 
C) voltage-regulated calcium channel 
D) chemically-regulated potassium channel 
E) chemically-regulated sodium channel

Question 6

The ________ nervous system controls the skeletal muscles.

Accepted Answer

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

Question 7

Which of the following does not influence the time necessary for a nerve impulse to be transmitted?

Accepted Answer

A) length of the axon 
B) presence or absence of a myelin sheath 
C) diameter of the axon 
D) presence or absence of nodes 
E) whether or not the impulse begins in the CNS 
A) length of the axon 
B) presence or absence of a myelin sheath 
C) diameter of the axon 
D) presence or absence of nodes 
E) whether or not the impulse begins in the CNS

Question 8

________ account for roughly half of the volume of the nervous system.

Accepted Answer

A) Axons 
B) Dendrites 
C) Neuroglia 
D) Synapses 
E) Efferent fibers 
A) Axons 
B) Dendrites 
C) Neuroglia 
D) Synapses 
E) Efferent fibers

Question 9

________ open or close in response to binding specific molecules.

Accepted Answer

A) Leak channels 
B) Activated channels 
C) Chemically gated channels 
D) Voltage-gated channels 
E) Voltage-gated and chemically gated channels 
A) Leak channels 
B) Activated channels 
C) Chemically gated channels 
D) Voltage-gated channels 
E) Voltage-gated and chemically gated channels

Question 10

Voltage-gated sodium channels have both an activation gate and a(n)________ gate.

Accepted Answer

A) inactivation 
B) ion 
C) swinging 
D) repolarization 
E) threshold 
A) inactivation 
B) ion 
C) swinging 
D) repolarization 
E) threshold

Question 11

Rabies is caused by a virus that attacks the central nervous system.The virus is normally introduced by an animal bite that breaks the surface of the skin.Since the virus is not motile,how does it travel to the central nervous system?

Accepted Answer

When the skin is broken by an animal bit

Question 12

Extensive damage to oligodendrocytes in the CNS could result in

Accepted Answer

A) loss of the structural framework of the brain. 
B) a breakdown of the blood-brain barrier. 
C) inability to produce scar tissue at the site of an injury. 
D) decreased production of cerebrospinal fluid. 
E) loss of sensation and motor control. 
A) loss of the structural framework of the brain. 
B) a breakdown of the blood-brain barrier. 
C) inability to produce scar tissue at the site of an injury. 
D) decreased production of cerebrospinal fluid. 
E) loss of sensation and motor control.

Question 13

Figure 12-1 The Neuron
Use Figure 12-1 to answer the following questions:
-Which type of membrane channels are found at label "3"?

Accepted Answer

A) voltage-gated Na⁺ channels 
B) voltage-gated K⁺ channels 
C) chemically-gated Na⁺ and K⁺ channels 
D) voltage-gated Ca²⁺ channels 
E) both voltage-gated Na⁺ channels and voltage-gated K⁺ channels 
A) voltage-gated Na⁺ channels 
B) voltage-gated K⁺ channels 
C) chemically-gated Na⁺ and K⁺ channels 
D) voltage-gated Ca²⁺ channels 
E) both voltage-gated Na⁺ channels and voltage-gated K⁺ channels

Question 14

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 15

The period during which an excitable membrane can respond again,but only if the stimulus is greater than the threshold stimulus,is the ________ period.

Accepted Answer

A) relative refractory 
B) absolute refractory 
C) resting 
D) lag 
E) stationary 
A) relative refractory 
B) absolute refractory 
C) resting 
D) lag 
E) stationary

Question 16

The nervous tissue outside of the central nervous system composes the ________ nervous system.

Accepted Answer

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

Question 17

The sum of the electrical and chemical forces acting on an ion is known as its

Accepted Answer

A) permeability gradient. 
B) thermodynamic difference. 
C) electrochemical gradient. 
D) action potential. 
E) summation difference. 
A) permeability gradient. 
B) thermodynamic difference. 
C) electrochemical gradient. 
D) action potential. 
E) summation difference.

Question 18

Which of the following activities or sensations is/are not monitored by interoceptors?

Accepted Answer

A) sight 
B) taste 
C) activities of the digestive system 
D) cardiovascular activities 
E) urinary activities 
A) sight 
B) taste 
C) activities of the digestive system 
D) cardiovascular activities 
E) urinary activities

Question 19

Which type of synapse is most common in the nervous system?

Accepted Answer

A) chemical 
B) electrical 
C) mechanical 
D) processing 
E) radiative 
A) chemical 
B) electrical 
C) mechanical 
D) processing 
E) radiative

Question 20

A movement of charges in response to a potential difference is called

Accepted Answer

A) current. 
B) depolarization. 
C) hyperpolarization. 
D) action potential. 
E) electricity. 
A) current. 
B) depolarization. 
C) hyperpolarization. 
D) action potential. 
E) electricity.

Exam 12: Neural Tissue

Neurons in which dendritic and axonal processes are continuous and the soma lies off to one side are called

Neurotransmitters ready for release are stored in synaptic

Which of the following is not involved in creating the resting potential of a neuron?

________ neurons are the most common structural class in the CNS.

If acetylcholine (ACh)causes inhibition of a postsynaptic neuron,to what type of membrane channel did the ACh bind?

The ________ nervous system controls the skeletal muscles.

Which of the following does not influence the time necessary for a nerve impulse to be transmitted?

________ account for roughly half of the volume of the nervous system.

________ open or close in response to binding specific molecules.

Voltage-gated sodium channels have both an activation gate and a(n)________ gate.

Rabies is caused by a virus that attacks the central nervous system.The virus is normally introduced by an animal bite that breaks the surface of the skin.Since the virus is not motile,how does it travel to the central nervous system?

Extensive damage to oligodendrocytes in the CNS could result in

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -Which type of membrane channels are found at label "3"?

The myelin sheath that covers many CNS axons is formed by

The period during which an excitable membrane can respond again,but only if the stimulus is greater than the threshold stimulus,is the ________ period.

The nervous tissue outside of the central nervous system composes the ________ nervous system.

The sum of the electrical and chemical forces acting on an ion is known as its

Which of the following activities or sensations is/are not monitored by interoceptors?

Which type of synapse is most common in the nervous system?

A movement of charges in response to a potential difference is called

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

Joints

Muscle Tissue

The Muscular System

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Sensory Pathways and the Somatic Nervous System

The Autonomic Nervous System and Higher-Order Functions

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

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