Question 1

In PNS nerve fiber regeneration,how is a growing axon directed to its original destination?

Accepted Answer

A)  It grows within a regeneration tube. 
B)  The axonal terminals grow towards the neurosoma until the two severed fragments are reunited. 
C)  The axon grows a collateral that is directed by growth factors secreted by the postsynaptic neuron. 
D)  Injured Schwann cells produce a trail of prostaglandins to the original destination. 
A)  It grows within a regeneration tube. 
B)  The axonal terminals grow towards the neurosoma until the two severed fragments are reunited. 
C)  The axon grows a collateral that is directed by growth factors secreted by the postsynaptic neuron. 
D)  Injured Schwann cells produce a trail of prostaglandins to the original destination.

Question 2

In a neuron,the opening of sodium gates typically leads to __________.

Accepted Answer

A)  repolarization of the plasma membrane 
B)  hyperpolarization of the plasma membrane 
C)  depolarization of the plasma membrane 
D)  drifting of plasma membrane voltage toward a more negative value 
E)  plasma membrane voltage returning to the resting membrane potential 
A)  repolarization of the plasma membrane 
B)  hyperpolarization of the plasma membrane 
C)  depolarization of the plasma membrane 
D)  drifting of plasma membrane voltage toward a more negative value 
E)  plasma membrane voltage returning to the resting membrane potential

Question 3

Memories are formed by neural pathways of modified synapses.

Accepted Answer

A) True 
 B)False

Question 4

What is the opposite of presynaptic inhibition?

Accepted Answer

A)  Coding 
B)  Integration 
C)  Recruitment 
D)  Summation 
E)  Facilitation 
A)  Coding 
B)  Integration 
C)  Recruitment 
D)  Summation 
E)  Facilitation

Question 5

Conduction of a nerve impulse would be the fastest in which of the following?

Accepted Answer

A)  A large diameter myelinated fiber 
B)  A small diameter myelinated fiber 
C)  A large unmyelinated fiber 
D)  A small unmyelinated fiber 
E)  A small fiber with multiple Schwann cells 
A)  A large diameter myelinated fiber 
B)  A small diameter myelinated fiber 
C)  A large unmyelinated fiber 
D)  A small unmyelinated fiber 
E)  A small fiber with multiple Schwann cells

Question 6

Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS.

Accepted Answer

A) True 
 B)False

Question 7

If the potassium leak channels were suddenly blocked in a resting neuron,what would happen to its resting membrane potential?

Accepted Answer

A)  It would become more positive. 
B)  It would become more negative. 
C)  The RMP would be unaffected. 
D)  It would hyperpolarize. 
A)  It would become more positive. 
B)  It would become more negative. 
C)  The RMP would be unaffected. 
D)  It would hyperpolarize.

Question 8

About 90% of the neurons in the nervous system are __________ neurons.

Accepted Answer

A)  sensory 
B)  motor 
C)  afferent 
D)  efferent 
E)  inter- 
A)  sensory 
B)  motor 
C)  afferent 
D)  efferent 
E)  inter-

Question 9

The respiratory center gathers information from a variety of sources in order to set the rate and depth of breathing.This is an example of what type of neural circuit?

Accepted Answer

A)  Convergent 
B)  Divergent 
C)  Reverberating 
D)  Parallel after-discharge 
A)  Convergent 
B)  Divergent 
C)  Reverberating 
D)  Parallel after-discharge

Question 10

The opening of __________ gates produces an __________.

Accepted Answer

A)  chloride;IPSP 
B)  sodium;IPSP 
C)  calcium;IPSP 
D)  potassium;EPSP 
E)  calcium and sodium;IPSP 
A)  chloride;IPSP 
B)  sodium;IPSP 
C)  calcium;IPSP 
D)  potassium;EPSP 
E)  calcium and sodium;IPSP

Question 11

Unipolar neurons have only a single process leading away from the neurosoma.

Accepted Answer

A) True 
 B)False

Question 12

Place the following events of synaptic transmission at an adrenergic synapse in order: A - ATP is converted to cAMP B - The cell's metabolism is altered C - G protein binds adenylate cylase D - The G protein dissociates E - NE binds the receptor

Accepted Answer

A)  E,D,C,A,B 
B)  E,D,A,C,B 
C)  D,E,C,A,B 
D)  D,E,A,C,B 
A)  E,D,C,A,B 
B)  E,D,A,C,B 
C)  D,E,C,A,B 
D)  D,E,A,C,B

Question 13

What is another name for the autonomic nervous system?

Accepted Answer

A)  Visceral sensory division 
B)  Somatic sensory division 
C)  Visceral motor division 
D)  Somatic motor division 
E)  Central nervous system 
A)  Visceral sensory division 
B)  Somatic sensory division 
C)  Visceral motor division 
D)  Somatic motor division 
E)  Central nervous system

Question 14

Most neurons have multiple dendrites.

Accepted Answer

A) True 
 B)False

Question 15

What occurs during hyperpolarization of a neuron membrane?

Accepted Answer

A)  Sodium ions are entering the cells 
B)  Sodium ions are leaving the cell 
C)  Potassium ions are entering the cell 
D)  Potassium ions are leaving the cell 
E)  Both sodium and potassium ions are leaving the cell 
A)  Sodium ions are entering the cells 
B)  Sodium ions are leaving the cell 
C)  Potassium ions are entering the cell 
D)  Potassium ions are leaving the cell 
E)  Both sodium and potassium ions are leaving the cell

Question 16

A myelin sheath is composed primarily of __________.

Accepted Answer

A)  lipids 
B)  carbohydrates 
C)  glycoproteins 
D)  proteins 
E)  polysaccharides 
A)  lipids 
B)  carbohydrates 
C)  glycoproteins 
D)  proteins 
E)  polysaccharides

Question 17

Which of the following is true regarding unmyelinated nerve fibers in the PNS?

Accepted Answer

A)  A Schwann cell folds its plasma membrane around several fibers . 
B)  A Schwann cells wraps its plasma membrane around each individual fiber as it does with myelinated fibers. 
C)  An oligodendrocyte cells wraps its plasma membrane around each fiber as it does with myelinated fibers. 
D)  Satellite cells cluster around each axon to form a pseudo-myelin sheath. 
A)  A Schwann cell folds its plasma membrane around several fibers . 
B)  A Schwann cells wraps its plasma membrane around each individual fiber as it does with myelinated fibers. 
C)  An oligodendrocyte cells wraps its plasma membrane around each fiber as it does with myelinated fibers. 
D)  Satellite cells cluster around each axon to form a pseudo-myelin sheath.

Question 18

The nervous system employs exclusively electrical means to send messages,whereas the endocrine system communicates by means of chemical messengers.

Accepted Answer

A) True 
 B)False

Question 19

A neuron can receive thousands of EPSPs from different neurons,and responds by triggering or not triggering an action potential.This addition and response to the net effect of postsynaptic potentials is called __________.

Accepted Answer

A)  temporal summation 
B)  neural summation 
C)  spatial summation 
D)  neuronal coding 
E)  recruitment 
A)  temporal summation 
B)  neural summation 
C)  spatial summation 
D)  neuronal coding 
E)  recruitment

Question 20

Which body system(s)is(are)dedicated to maintaining stable internal conditions by detecting and responding to stimuli?

Accepted Answer

A)  Nervous and endocrine 
B)  Nervous 
C)  Endocrine 
D)  Nervous,endocrine,and integumentary 
A)  Nervous and endocrine 
B)  Nervous 
C)  Endocrine 
D)  Nervous,endocrine,and integumentary

Exam 12: Nervous Tissue

In PNS nerve fiber regeneration,how is a growing axon directed to its original destination?

In a neuron,the opening of sodium gates typically leads to __________.

Memories are formed by neural pathways of modified synapses.

What is the opposite of presynaptic inhibition?

Conduction of a nerve impulse would be the fastest in which of the following?

Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS.

If the potassium leak channels were suddenly blocked in a resting neuron,what would happen to its resting membrane potential?

About 90% of the neurons in the nervous system are __________ neurons.

The respiratory center gathers information from a variety of sources in order to set the rate and depth of breathing.This is an example of what type of neural circuit?

The opening of __________ gates produces an __________.

Unipolar neurons have only a single process leading away from the neurosoma.

Place the following events of synaptic transmission at an adrenergic synapse in order: A - ATP is converted to cAMP B - The cell's metabolism is altered C - G protein binds adenylate cylase D - The G protein dissociates E - NE binds the receptor

What is another name for the autonomic nervous system?

Most neurons have multiple dendrites.

What occurs during hyperpolarization of a neuron membrane?

A myelin sheath is composed primarily of __________.

Which of the following is true regarding unmyelinated nerve fibers in the PNS?

The nervous system employs exclusively electrical means to send messages,whereas the endocrine system communicates by means of chemical messengers.

A neuron can receive thousands of EPSPs from different neurons,and responds by triggering or not triggering an action potential.This addition and response to the net effect of postsynaptic potentials is called __________.

Which body system(s)is(are)dedicated to maintaining stable internal conditions by detecting and responding to stimuli?

Major Themes of Anatomy and Physiology

The Chemistry of Life

Cellular Form and Function

Genetics of Cellular Function

Histology

The Integumentary System

Bone Tissue

The Skeletal System

Joints

The Muscular System

Muscular Tissue

The Spinal Cord,spinal Nerves,and Somatic Reflexes

The Brain and Cranial Nerves

The Autonomic Nervous System and Visceral Reflexes

Sense Organs

The Endocrine System

The Circulatory System: Blood

The Circulatory System: Heart

The Circulatory System: Blood Vessels and Circulation

The Lymphatic and Immune Systems

The Respiratory System

The Urinary System

Fluid, electrolyte, and Acidbase Balance

The Digestive System

Nutrition and Metabolism

The Male Reproductive System

The Female Reproductive System

Human Development and Aging

Atlas a General Orientation to Human Anatomy

Filters

The opening of gates produces an .