Question 1

Which of the following explains the difference in response to the plantar reflex test in infants and adults?

Accepted Answer

A)  destruction of motor neurons 
B)  incomplete myelination of nerve fibers 
C)  altered sensory processing in the integration center 
D)  destruction of sensory neurons 
A)  destruction of motor neurons 
B)  incomplete myelination of nerve fibers 
C)  altered sensory processing in the integration center 
D)  destruction of sensory neurons B

Question 2

Which of the following is a normal response to the patellar reflex test?

Accepted Answer

A)  contraction of the quadriceps femoris muscles and slight extension of the leg 
B)  contraction of the gastrocnemius and soleus coupled with slight plantar flexion 
C)  spreading of the toes 
D)  plantar flexion 
A)  contraction of the quadriceps femoris muscles and slight extension of the leg 
B)  contraction of the gastrocnemius and soleus coupled with slight plantar flexion 
C)  spreading of the toes 
D)  plantar flexion A

Question 3

Which of the following elements of a reflex arc is responsible for delivering sensory impulses from the receptor to the central nervous system?

Accepted Answer

A)  integration center 
B)  motor neuron 
C)  sensory neuron 
D)  sensory receptor 
A)  integration center 
B)  motor neuron 
C)  sensory neuron 
D)  sensory receptor C

Question 4

Reflexes help clinicians assess the functional integrity of the ________.

Accepted Answer

A)  PNS and CNS 
B)  PNS 
C)  muscular system 
D)  CNS 
A)  PNS and CNS 
B)  PNS 
C)  muscular system 
D)  CNS

Question 5

What would be the clinical significance of an absent or weak triceps reflex?

Accepted Answer

A)  sensory or motor neuron damage along spinal nerves C7 and C8 
B)  motor neuron damage along spinal nerves C7 and C8 
C)  sensory neuron damage along spinal nerves C7 and C8 
D)  sensory or motor neuron damage along spinal nerves S1 and S2 
A)  sensory or motor neuron damage along spinal nerves C7 and C8 
B)  motor neuron damage along spinal nerves C7 and C8 
C)  sensory neuron damage along spinal nerves C7 and C8 
D)  sensory or motor neuron damage along spinal nerves S1 and S2

Question 6

Which element of a reflex arc is responsible for receiving and processing sensory information and transferring it to motor neurons?

Accepted Answer

A)  effector organ 
B)  motor neuron 
C)  sensory neuron 
D)  integration center 
A)  effector organ 
B)  motor neuron 
C)  sensory neuron 
D)  integration center

Question 7

Proprioception plays an important role in the ability to ________.

Accepted Answer

A)  climb a rope 
B)  maintain balance while under the influence of alcohol or drugs 
C)  maintain hand-eye coordination 
D)  navigate through a dark home 
A)  climb a rope 
B)  maintain balance while under the influence of alcohol or drugs 
C)  maintain hand-eye coordination 
D)  navigate through a dark home

Question 8

The triceps reflex tests the function of levels ________ of the spinal cord.

Accepted Answer

A)  C5 and C6 
B)  C7 and C8 
C)  L2, L3, and L4 
D)  S1 and S2 
A)  C5 and C6 
B)  C7 and C8 
C)  L2, L3, and L4 
D)  S1 and S2

Question 9

Which of the following explains how the motor area on the right side of the brain controls motor function of the left side of the body?

Accepted Answer

A)  Upper motor neurons cross over to the opposite side. 
B)  Lower motor neurons cross over to the opposite side. 
C)  The precentral gyrus contains the cell bodies of upper motor neurons. 
D)  Upper motor neurons synapse with lower motor neurons in the brainstem or spinal cord. 
A)  Upper motor neurons cross over to the opposite side. 
B)  Lower motor neurons cross over to the opposite side. 
C)  The precentral gyrus contains the cell bodies of upper motor neurons. 
D)  Upper motor neurons synapse with lower motor neurons in the brainstem or spinal cord.

Question 10

A ________ is an automatic,involuntary,and predictable response to a stimulus.

Accepted Answer

A)  reflex 
B)  plexus 
C)  effector 
D)  neuron 
A)  reflex 
B)  plexus 
C)  effector 
D)  neuron

Question 11

Which component of a reflex arc responds to stimuli (either external or internal)?

Accepted Answer

A)  sensory neuron 
B)  motor neuron 
C)  integration center 
D)  sensory receptor 
A)  sensory neuron 
B)  motor neuron 
C)  integration center 
D)  sensory receptor

Question 12

The biceps reflex tests the function of levels ________ of the spinal cord.

Accepted Answer

A)  C5 and C6 
B)  S1 and S2 
C)  L2, L3, and L4 
D)  C7 and C8 
A)  C5 and C6 
B)  S1 and S2 
C)  L2, L3, and L4 
D)  C7 and C8

Question 13

What would be the clinical significance of a positive Babinski sign in an adult?

Accepted Answer

A)  damage to the descending (motor) tracts in the spinal cord, indicating possible spinal cord damage 
B)  muscle spindle damage 
C)  incomplete myelination 
D)  sensory neuron damage in the spinal cord 
A)  damage to the descending (motor) tracts in the spinal cord, indicating possible spinal cord damage 
B)  muscle spindle damage 
C)  incomplete myelination 
D)  sensory neuron damage in the spinal cord

Question 14

Which of the following is a normal response to the plantar reflex test in an infant?

Accepted Answer

A)  plantar flexion of the foot 
B)  slight flexion of the forearm 
C)  extension of the great toe and spreading of the other toes 
D)  slight extension of the forearm 
A)  plantar flexion of the foot 
B)  slight flexion of the forearm 
C)  extension of the great toe and spreading of the other toes 
D)  slight extension of the forearm

Question 15

Which element of a reflex arc is responsible for carrying out an action in response to a stimulus?

Accepted Answer

A)  motor neuron 
B)  effector organ 
C)  sensory receptor 
D)  sensory neuron 
A)  motor neuron 
B)  effector organ 
C)  sensory receptor 
D)  sensory neuron

Question 16

Stretch reflexes are triggered by engagement of sensory receptors called ________.

Accepted Answer

A)  sensory receptors 
B)  skeletal muscles 
C)  muscle fascicles 
D)  muscle spindles 
A)  sensory receptors 
B)  skeletal muscles 
C)  muscle fascicles 
D)  muscle spindles

Question 17

Which of the elements of a reflex arc is responsible for delivering motor impulses from the central nervous system to effector organs?

Accepted Answer

A)  motor neuron 
B)  sensory neuron 
C)  integration center 
D)  sensory receptor 
A)  motor neuron 
B)  sensory neuron 
C)  integration center 
D)  sensory receptor

Question 18

The sensory and motor impulses of a reflex follow a specific pathway that consists of a sensory receptor sensory neuron,integration center,motor neuron,and effector organ.This pathway is known as a ________.

Accepted Answer

A)  muscle spindle 
B)  reflex 
C)  stretch reflex 
D)  reflex arc 
A)  muscle spindle 
B)  reflex 
C)  stretch reflex 
D)  reflex arc

Question 19

After consuming several servings of a beverage containing alcohol,your roommate is unable to maintain the balance required to walk in a straight line.What can this behavior be attributed to?

Accepted Answer

A)  Beverages containing alcohol affect the nervous system but do not impair balance. 
B)  Beverages containing alcohol have no effect on the nervous system. 
C)  Alcohol temporarily alters proper functioning of the cerebellum. 
D)  Alcohol temporarily alters proper functioning of the cerebrum. 
A)  Beverages containing alcohol affect the nervous system but do not impair balance. 
B)  Beverages containing alcohol have no effect on the nervous system. 
C)  Alcohol temporarily alters proper functioning of the cerebellum. 
D)  Alcohol temporarily alters proper functioning of the cerebrum.

Question 20

Which of the following is a normal response to the plantar reflex test in an adult?

Accepted Answer

A)  extension of the great toe and spreading of the other toes 
B)  slight extension of the forearm 
C)  plantar flexion of the foot 
D)  slight flexion of the forearm 
A)  extension of the great toe and spreading of the other toes 
B)  slight extension of the forearm 
C)  plantar flexion of the foot 
D)  slight flexion of the forearm

Exam 17: Human Reflex Physiology

Which of the following explains the difference in response to the plantar reflex test in infants and adults?

Which of the following is a normal response to the patellar reflex test?

Which of the following elements of a reflex arc is responsible for delivering sensory impulses from the receptor to the central nervous system?

Reflexes help clinicians assess the functional integrity of the ________.

What would be the clinical significance of an absent or weak triceps reflex?

Which element of a reflex arc is responsible for receiving and processing sensory information and transferring it to motor neurons?

Proprioception plays an important role in the ability to ________.

The triceps reflex tests the function of levels ________ of the spinal cord.

Which of the following explains how the motor area on the right side of the brain controls motor function of the left side of the body?

A ________ is an automatic,involuntary,and predictable response to a stimulus.

Which component of a reflex arc responds to stimuli (either external or internal)?

The biceps reflex tests the function of levels ________ of the spinal cord.

What would be the clinical significance of a positive Babinski sign in an adult?

Which of the following is a normal response to the plantar reflex test in an infant?

Which element of a reflex arc is responsible for carrying out an action in response to a stimulus?

Stretch reflexes are triggered by engagement of sensory receptors called ________.

Which of the elements of a reflex arc is responsible for delivering motor impulses from the central nervous system to effector organs?

The sensory and motor impulses of a reflex follow a specific pathway that consists of a sensory receptor sensory neuron,integration center,motor neuron,and effector organ.This pathway is known as a ________.

After consuming several servings of a beverage containing alcohol,your roommate is unable to maintain the balance required to walk in a straight line.What can this behavior be attributed to?

Which of the following is a normal response to the plantar reflex test in an adult?

Body Organization and Terminology

Care and Use of the Compound Light Microscope

Cell Structure and Cell Division

Membrane Transport

Tissues

The Integumentary System

Introduction to the Skeletal System and the Axial Skeleton

The Appendicular Skeleton

Articulations

Introduction to Skeletal Muscle

Muscles of the Head, Neck, and Trunk

Muscles of the Upper and Lower Limbs

Physiology of the Muscular System

Nervous Tissue

The Brain and Cranial Nerves

The Spinal Cord and Spinal Nerves

Special Senses

The Endocrine System

Blood Cells

Gross Anatomy of the Heart

Anatomy of Blood Vessels

Cardiovascular Physiology

The Lymphatic System

Anatomy of the Respiratory System

Respiratory Physiology

Anatomy of the Digestive System

Actions of a Digestive Enzyme

Anatomy of the Urinary System

Urinary Physiology

The Male Reproductive System

The Female Reproductive System

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