Question 1

In nervous system physiology, the definition of a reflex is a .

Accepted Answer

A)  well thought out, therefore slow, response to an emergency situation 
B)  voluntary response, which can be withheld 
C)  rapid, predictable, involuntary motor response to a stimulus 
D)  variable response to a startling stimulus 
A)  well thought out, therefore slow, response to an emergency situation 
B)  voluntary response, which can be withheld 
C)  rapid, predictable, involuntary motor response to a stimulus 
D)  variable response to a startling stimulus C

Question 2

The neural pathway for a reflex is called .

Accepted Answer

A)  an intrinsic reflex 
B)  an autonomic reflex 
C)  a somatic reflex 
D)  a reflex arc 
A)  an intrinsic reflex 
B)  an autonomic reflex 
C)  a somatic reflex 
D)  a reflex arc D

Question 3

The crossed extensor reflex is an example of a(n) _.

Accepted Answer

A)  special senses reflex 
B)  autonomic reflex 
C)  somatic reflex 
D)  voluntary reflex 
A)  special senses reflex 
B)  autonomic reflex 
C)  somatic reflex 
D)  voluntary reflex C

Question 4

Which of the following cranial nerve mediates the corneal reflex?

Accepted Answer

A)  trigeminal 
B)  oculomotor 
C)  trochlear 
D)  abducens 
A)  trigeminal 
B)  oculomotor 
C)  trochlear 
D)  abducens

Question 5

Which statement about neural reflex arcs is incorrect?

Accepted Answer

A)  An afferent path leads to the integrating center and an efferent path leads away from it. 
B)  They are slowed down by the hormones involved. 
C)  Their function is to protect the body from harm caused by homeostatic imbalances or external events. 
D)  They contain the following elements: receptor, integrating center, and effector. 
A)  An afferent path leads to the integrating center and an efferent path leads away from it. 
B)  They are slowed down by the hormones involved. 
C)  Their function is to protect the body from harm caused by homeostatic imbalances or external events. 
D)  They contain the following elements: receptor, integrating center, and effector.

Question 6

An abnormal plantar reflex in an adult produces Babinski's sign, which indicates _.

Accepted Answer

A)  damage to the corticospinal tract 
B)  nerve damage to the leg 
C)  damage to the muscles that move the ankle 
D)  damage to the dorsal columns 
A)  damage to the corticospinal tract 
B)  nerve damage to the leg 
C)  damage to the muscles that move the ankle 
D)  damage to the dorsal columns

Question 7

Which statement is false about testing reflexes?

Accepted Answer

A)  It is very difficult to assess reflex responses. 
B)  Exaggerated reflex responses indicate pathology to the nervous system. 
C)  The absence of reflex responses indicates pathology to the nervous system. 
D)  Tests of reflexes can help localize the area of injury when the spinal cord has been damaged. 
A)  It is very difficult to assess reflex responses. 
B)  Exaggerated reflex responses indicate pathology to the nervous system. 
C)  The absence of reflex responses indicates pathology to the nervous system. 
D)  Tests of reflexes can help localize the area of injury when the spinal cord has been damaged.

Question 8

The functions of the pupillary responses include _ .

Accepted Answer

A)  protecting the retina from damage by bright light 
B)  protecting the eyeball from damage 
C)  testing the integrity of the sympathetic nervous system 
D)  assessing the ability of the eyelid to close 
A)  protecting the retina from damage by bright light 
B)  protecting the eyeball from damage 
C)  testing the integrity of the sympathetic nervous system 
D)  assessing the ability of the eyelid to close

Question 9

What is true about somatic reflexes?

Accepted Answer

A)  They are important in regulating digestion and blood pressure. 
B)  They help prepare the body for "fight-or-flight." 
C)  They activate skeletal muscle. 
D)  We are not usually aware of them. 
A)  They are important in regulating digestion and blood pressure. 
B)  They help prepare the body for "fight-or-flight." 
C)  They activate skeletal muscle. 
D)  We are not usually aware of them.

Question 10

What is the first event associated with a reflex?

Accepted Answer

A)  The effector produces a response. 
B)  The integrating center elicits a response. 
C)  The integrating center receives information and makes decisions based upon the information. 
D)  The receptor detects a stimulus. 
A)  The effector produces a response. 
B)  The integrating center elicits a response. 
C)  The integrating center receives information and makes decisions based upon the information. 
D)  The receptor detects a stimulus.

Question 11

Which of the following will cause the reaction time of a reflex to increase?

Accepted Answer

A)  rapid nerve conduction velocity 
B)  rapid activation of the effector 
C)  a large number of neurons and their associated synapses 
D)  great sensitivity of the receptors for the reflex 
A)  rapid nerve conduction velocity 
B)  rapid activation of the effector 
C)  a large number of neurons and their associated synapses 
D)  great sensitivity of the receptors for the reflex

Question 12

The pupillary light reflex is an example of a(n) .

Accepted Answer

A)  somatic reflex 
B)  autonomic reflex 
C)  special senses reflex 
D)  voluntary reflex 
A)  somatic reflex 
B)  autonomic reflex 
C)  special senses reflex 
D)  voluntary reflex

Question 13

The patellar or knee-jerk reflex involves .

Accepted Answer

A)  stimulatory nerve impulses to both quadriceps and the hamstrings 
B)  stimulatory nerve impulses to the quadriceps and inhibitory impulses to the hamstrings 
C)  stimulatory nerve impulses to the hamstrings and inhibitory impulses to the quadriceps 
D)  inhibitory nerve impulses to both quadriceps and the hamstrings 
A)  stimulatory nerve impulses to both quadriceps and the hamstrings 
B)  stimulatory nerve impulses to the quadriceps and inhibitory impulses to the hamstrings 
C)  stimulatory nerve impulses to the hamstrings and inhibitory impulses to the quadriceps 
D)  inhibitory nerve impulses to both quadriceps and the hamstrings

Question 14

Predict which of the following reflexes will have the most rapid response time.

Accepted Answer

A)  applying the brakes when a person darts in front of your car 
B)  catching a ruler between your thumb and index finger 
C)  the stretch reflex 
D)  the crossed extensor reflex 
A)  applying the brakes when a person darts in front of your car 
B)  catching a ruler between your thumb and index finger 
C)  the stretch reflex 
D)  the crossed extensor reflex

Question 15

Name the receptor for the stretch reflex.

Accepted Answer

A)  pain receptors 
B)  temperature receptors 
C)  tendon organ 
D)  muscle spindle (indicates stretch on the muscle) 
A)  pain receptors 
B)  temperature receptors 
C)  tendon organ 
D)  muscle spindle (indicates stretch on the muscle)

Exam 21: Human Reflex Physiology

In nervous system physiology, the definition of a reflex is a .

The neural pathway for a reflex is called .

The crossed extensor reflex is an example of a(n) _.

Which of the following cranial nerve mediates the corneal reflex?

Which statement about neural reflex arcs is incorrect?

An abnormal plantar reflex in an adult produces Babinski's sign, which indicates _.

Which statement is false about testing reflexes?

The functions of the pupillary responses include _ .

What is true about somatic reflexes?

What is the first event associated with a reflex?

Which of the following will cause the reaction time of a reflex to increase?

The pupillary light reflex is an example of a(n) .

The patellar or knee-jerk reflex involves .

Predict which of the following reflexes will have the most rapid response time.

Name the receptor for the stretch reflex.

The Language of Anatomy

Organ Systems Overview

The Microscope

The Cell: Anatomy and Division

The Cell: Transport Mechanisms and Cell Permeability

Classification of Tissues

The Integumentary System

Overview of the Skeleton: Classification and Structure of Bones and Cartilages

The Axial Skeleton

The Appendicular Skeleton

Articulations and Body Movements

Microscopic Anatomy and Organization of Skeletal Muscle

Gross Anatomy of Muscular System

Skeletal Muscle Physiology: Frogs and Human Subjects

Histology of Nervous Tissue

Neurophysiology of Nerve Impulses: Frog Subjects

Gross Anatomy of the Brain and Cranial Nerves

Electroencephalography

The Spinal Cord and Spinal Nerves

The Autonomic Nervous System

General Sensation

Special Senses: Anatomy of the Visual System

Special Senses: Visual Tests and Experiments

Special Senses: Hearing and Equilibrium

Special Senses: Olfaction and Taste

Functional Anatomy of the Endocrine Glands

Endocrine Wet Labs and Human Metabolism

Blood

Anatomy of the Heart

Conduction System of the Heart and Electrocardiography

Anatomy of Blood Vessels

Human Cardiovascular Physiology: Blood Pressure and Pulse Determinations

Frog Cardiovascular Physiology

The Lymphatic System and Immune Response

Anatomy of the Respiratory System

Respiratory System Physiology

Anatomy of the Digestive System

Digestive System Processes: Chemical and Physical

Anatomy of the Urinary System

Urinalysis

Anatomy of the Reproductive System

Physiology of Reproduction: Gametogenesis and the Female Cycles

Survey of Embryonic Development

Principles of Heredity

Surface Anatomy Roundup

Filters