Question 1

The phenomenon in skeletal muscle known as muscle tone

Accepted Answer

A) Is related to the passive elasticity exhibited by the anatomical components of the whole muscle 
B) Is related directly to a continuous low level of alpha motor neuron signaling 
C) Is the lack of extensibility observed at any given moment in the tendons found at both the origin and insertion of the muscle 
D) Both is related to the passive elasticity exhibited by the anatomical components of the whole muscle and is related directly to a continuous low level of alpha motor neuron signaling are correct 
E) Both is related directly to a continuous low level of alpha motor neuron signaling and is the lack of extensibility observed at any given moment in the tendons found at both the origin and insertion of the muscle are correct 
A) Is related to the passive elasticity exhibited by the anatomical components of the whole muscle 
B) Is related directly to a continuous low level of alpha motor neuron signaling 
C) Is the lack of extensibility observed at any given moment in the tendons found at both the origin and insertion of the muscle 
D) Both is related to the passive elasticity exhibited by the anatomical components of the whole muscle and is related directly to a continuous low level of alpha motor neuron signaling are correct 
E) Both is related directly to a continuous low level of alpha motor neuron signaling and is the lack of extensibility observed at any given moment in the tendons found at both the origin and insertion of the muscle are correct

Question 2

The fewer motor neurons of a given motor neuron pool that are activated,the finer is the control of muscle movement.

Accepted Answer

A) True 
 B)False

Question 3

Stimulation of a Golgi tendon organ causes a reflex contraction of the muscle whose tension the receptor is monitoring.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following statements regarding control of body movement is correct?

Accepted Answer

A) The basal ganglia receive input from dopaminergic neurons of the substantia nigra 
B) The cerebellum is important for the initiation of body movement 
C) The basal ganglia form part of the corticospinal pathways 
D) The skeletal muscles of the body are represented in the primary motor cortex proportionately to their size 
E) None of the choices are correct 
A) The basal ganglia receive input from dopaminergic neurons of the substantia nigra 
B) The cerebellum is important for the initiation of body movement 
C) The basal ganglia form part of the corticospinal pathways 
D) The skeletal muscles of the body are represented in the primary motor cortex proportionately to their size 
E) None of the choices are correct

Question 5

The skeletal muscles of the body are represented in the primary motor cortex proportionately to their size.

Accepted Answer

A) True 
 B)False

Question 6

When a person steps on a tack with the left foot,flexor muscles on the right leg and extensor muscles on the left leg will be stimulated to contract.

Accepted Answer

A) True 
 B)False

Question 7

Motor pathways extending from the central nervous system to muscle fibers are subject to control by both excitatory or inhibitory interneurons.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following is not true of corticospinal fibers? They

Accepted Answer

A) May synapse directly on alpha motor neurons 
B) May synapse directly on gamma motor neurons 
C) May synapse directly on interneurons 
D) Generally affect large groups of muscles 
E) May synapse with afferent neurons in ascending pathways 
A) May synapse directly on alpha motor neurons 
B) May synapse directly on gamma motor neurons 
C) May synapse directly on interneurons 
D) Generally affect large groups of muscles 
E) May synapse with afferent neurons in ascending pathways

Question 9

The fibers in a muscle spindle

Accepted Answer

A) Are not true muscle fibers because they cannot contract 
B) Are innervated by gamma motor neurons 
C) Function to maintain tension on spindle receptors 
D) Both are innervated by gamma motor neurons and function to maintain tension on spindle receptors are correct 
E) All of the choices are correct 
A) Are not true muscle fibers because they cannot contract 
B) Are innervated by gamma motor neurons 
C) Function to maintain tension on spindle receptors 
D) Both are innervated by gamma motor neurons and function to maintain tension on spindle receptors are correct 
E) All of the choices are correct

Question 10

Which of the following statements is true with regard to control of body movement?

Accepted Answer

A) The highest level of the hierarchy of motor control includes the frontal lobe cortex, the primary motor cortex and the basal ganglia 
B) The highest level of the hierarchy of motor control is composed entirely of areas of cerebral cortex 
C) The middle level of the hierarchy of motor control assembles programs or patterns of activity and then monitors them as the movement is carried out 
D) Both the highest level of the hierarchy of motor control includes the frontal lobe cortex, the primary motor cortex and the basal ganglia and the highest level of the hierarchy of motor control is composed entirely of areas of cerebral cortex are true 
E) Both the highest level of the hierarchy of motor control is composed entirely of areas of cerebral cortex and the middle level of the hierarchy of motor control assembles programs or patterns of activity and then monitors them as the movement is carried out are true 
A) The highest level of the hierarchy of motor control includes the frontal lobe cortex, the primary motor cortex and the basal ganglia 
B) The highest level of the hierarchy of motor control is composed entirely of areas of cerebral cortex 
C) The middle level of the hierarchy of motor control assembles programs or patterns of activity and then monitors them as the movement is carried out 
D) Both the highest level of the hierarchy of motor control includes the frontal lobe cortex, the primary motor cortex and the basal ganglia and the highest level of the hierarchy of motor control is composed entirely of areas of cerebral cortex are true 
E) Both the highest level of the hierarchy of motor control is composed entirely of areas of cerebral cortex and the middle level of the hierarchy of motor control assembles programs or patterns of activity and then monitors them as the movement is carried out are true

Question 11

In Parkinson's disease,

Accepted Answer

A) Input from the substantia nigra to the basal ganglia is impaired 
B) Ability to suppress unwanted movement is impaired 
C) Ability to make voluntary movements is not impaired 
D) Both input from the substantia nigra to the basal ganglia is impaired and ability to suppress unwanted movement is impaired are correct 
E) All of the choices are correct 
A) Input from the substantia nigra to the basal ganglia is impaired 
B) Ability to suppress unwanted movement is impaired 
C) Ability to make voluntary movements is not impaired 
D) Both input from the substantia nigra to the basal ganglia is impaired and ability to suppress unwanted movement is impaired are correct 
E) All of the choices are correct

Question 12

Information from the muscle-spindle stretch receptors is not conveyed above the level of the spinal cord and thus does not reach consciousness.

Accepted Answer

A) True 
 B)False

The phenomenon in skeletal muscle known as muscle tone

The fewer motor neurons of a given motor neuron pool that are activated,the finer is the control of muscle movement.

Stimulation of a Golgi tendon organ causes a reflex contraction of the muscle whose tension the receptor is monitoring.

Which of the following statements regarding control of body movement is correct?

The skeletal muscles of the body are represented in the primary motor cortex proportionately to their size.

When a person steps on a tack with the left foot,flexor muscles on the right leg and extensor muscles on the left leg will be stimulated to contract.

Motor pathways extending from the central nervous system to muscle fibers are subject to control by both excitatory or inhibitory interneurons.

Which of the following is not true of corticospinal fibers? They

The fibers in a muscle spindle

Which of the following statements is true with regard to control of body movement?

In Parkinson's disease,

Information from the muscle-spindle stretch receptors is not conveyed above the level of the spinal cord and thus does not reach consciousness.

Homeostasis: a Framework for Human Physiology

Chemical Composition of the Body

Cellular Structure, Proteins, and Metabolism

Movement of Molecules Across Cell Membranes

Control of Cells by Chemical Messengers

Neuronal Signaling and the Structure of the Nervous System

Sensory Physiology

Consciousness, the Brain, and Behavior

Muscle

The Endocrine System

Cardiovascular Physiology

Respiratory Physiology

The Kidneys and Regulation of Water and Inorganic Ions

The Digestion and Absorption of Food

Regulation of Organic Metabolism and Energy Balance

Reproduction

The Immune System

Medical Physiology: Integration Using Clinical Cases

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Exam 10: Control of Body Movement

The phenomenon in skeletal muscle known as muscle tone

The fewer motor neurons of a given motor neuron pool that are activated,the finer is the control of muscle movement.

Stimulation of a Golgi tendon organ causes a reflex contraction of the muscle whose tension the receptor is monitoring.

Which of the following statements regarding control of body movement is correct?

The skeletal muscles of the body are represented in the primary motor cortex proportionately to their size.

When a person steps on a tack with the left foot,flexor muscles on the right leg and extensor muscles on the left leg will be stimulated to contract.

Motor pathways extending from the central nervous system to muscle fibers are subject to control by both excitatory or inhibitory interneurons.

Which of the following is not true of corticospinal fibers? They

The fibers in a muscle spindle

Which of the following statements is true with regard to control of body movement?

In Parkinson's disease,

Information from the muscle-spindle stretch receptors is not conveyed above the level of the spinal cord and thus does not reach consciousness.

Homeostasis: a Framework for Human Physiology

Chemical Composition of the Body

Cellular Structure, Proteins, and Metabolism

Movement of Molecules Across Cell Membranes

Control of Cells by Chemical Messengers

Neuronal Signaling and the Structure of the Nervous System

Sensory Physiology

Consciousness, the Brain, and Behavior

Muscle

The Endocrine System

Cardiovascular Physiology

Respiratory Physiology

The Kidneys and Regulation of Water and Inorganic Ions

The Digestion and Absorption of Food

Regulation of Organic Metabolism and Energy Balance

Reproduction

The Immune System

Medical Physiology: Integration Using Clinical Cases

Filters