Question 1

The term excitation-contraction coupling refers to the series of events linking signals from the brain to the spinal cord.

Accepted Answer

A) True 
 B)False

Question 2

Myosin is considered to be a regulatory protein because it plays an important role in the regulation of muscle contraction.

Accepted Answer

A) True 
 B)False

Question 3

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below:
-Is attached to bones.

Accepted Answer

A) skeletal muscle only 
B) single-unit smooth muscle only 
C) cardiac muscle only 
D) skeletal muscle and cardiac muscle 
E) skeletal muscle and single-unit smooth muscle
F)single-unit smooth muscle and cardiac muscle
G)skeletal, single-unit smooth, and cardiac muscles 
A) skeletal muscle only 
B) single-unit smooth muscle only 
C) cardiac muscle only 
D) skeletal muscle and cardiac muscle 
E) skeletal muscle and single-unit smooth muscle
F)single-unit smooth muscle and cardiac muscle
G)skeletal, single-unit smooth, and cardiac muscles

Question 4

Which is characteristic of cardiac muscle tissue?

Accepted Answer

A)  well developed sarcoplasmic reticulum. 
B)  fast myosin ATPase activity. 
C)  contraction is initiated neurogenically. 
D)  presence of gap junctions. 
E)  calcium supplied by sarcoplasmic reticulum exclusively. 
A)  well developed sarcoplasmic reticulum. 
B)  fast myosin ATPase activity. 
C)  contraction is initiated neurogenically. 
D)  presence of gap junctions. 
E)  calcium supplied by sarcoplasmic reticulum exclusively.

Question 5

Indicate which bands are being described in each statement by writing the appropriate letter(s) in the blank using the answer code below (more than one answer may apply):
-Remains the same size during muscle contraction.

Accepted Answer

A) A band 
B) I band 
C) H zone 
A) A band 
B) I band 
C) H zone

Question 6

More tension is developed during twitch summation than during a single twitch because the duration of elevated cytosolic Ca²+ concentration increases during summation, thus increasing the availability of cross-bridge binding sites.

Accepted Answer

A) True 
 B)False

Question 7

A(n) ____________________ is a motor neuron and all the muscle fibers it recruits.

Accepted Answer

The answer of A(n) ____________________ is a motor neuron and...

Question 8

The immediate source of additional ATP in muscle fibers is ____________________.

Accepted Answer

The answer of The immediate source of additional ATP in...

Question 9

With eccentric muscle contractions,

Accepted Answer

A)  the development of tension occurs at constant muscle length. 
B)  the muscle lengthens while contracting. 
C)  the muscle shortens while contracting. 
D)  muscle length and tension vary throughout a range of motion. 
E)  none of these answers. 
A)  the development of tension occurs at constant muscle length. 
B)  the muscle lengthens while contracting. 
C)  the muscle shortens while contracting. 
D)  muscle length and tension vary throughout a range of motion. 
E)  none of these answers.

Question 10

The oxygen debt is the oxygen a skeletal muscle produces or pays off when it carries out glycolysis.

Accepted Answer

A) True 
 B)False

Question 11

During contraction, asynchronous cycling of crossbridges

Accepted Answer

A)  prevents tetany. 
B)  prevents thick filaments from slipping backwards. 
C)  prevents thin filaments from slipping backwards. 
D)  utilizes less ATP. 
E)  none of these answers. 
A)  prevents tetany. 
B)  prevents thick filaments from slipping backwards. 
C)  prevents thin filaments from slipping backwards. 
D)  utilizes less ATP. 
E)  none of these answers.

Question 12

Indicate the characteristics of the muscle-tension receptors using the following answer code:
-Monitors change in muscle length.

Accepted Answer

A) muscle spindle 
B) Golgi tendon organ 
C) both of these receptors 
A) muscle spindle 
B) Golgi tendon organ 
C) both of these receptors

Question 13

____________________ provide the most ATP molecules for use by muscle fibers contracting over a long period of time.

Accepted Answer

oxidative

Question 14

Fast-glycolytic muscle fibers do not require as much oxygen use than slow-oxidative fibers.

Accepted Answer

A) True 
 B)False

Question 15

A functional syncytium

Accepted Answer

A)  refers to a pair of antagonistic muscles that function together to move a joint in two opposite directions. 
B)  can be excited to contract as a unit because action potentials can be conducted from one cell to adjacent cells through gap junctions. 
C)  refers to the functional junction between a smooth muscle fiber and an autonomic nerve ending. 
D)  more than one of these. 
E)  none of these answers. 
A)  refers to a pair of antagonistic muscles that function together to move a joint in two opposite directions. 
B)  can be excited to contract as a unit because action potentials can be conducted from one cell to adjacent cells through gap junctions. 
C)  refers to the functional junction between a smooth muscle fiber and an autonomic nerve ending. 
D)  more than one of these. 
E)  none of these answers.

Question 16

Single-unit smooth muscle

Accepted Answer

A)  contains an abundance of gap junctions and forms functional syncytia. 
B)  is self-excitable. 
C)  is found in the walls of the digestive, reproductive, and urinary tracts and small blood vessels. 
D)  both contains an abundance of gap junctions and forms functional syncytia and is self-excitable. 
E)  all of these answers. 
A)  contains an abundance of gap junctions and forms functional syncytia. 
B)  is self-excitable. 
C)  is found in the walls of the digestive, reproductive, and urinary tracts and small blood vessels. 
D)  both contains an abundance of gap junctions and forms functional syncytia and is self-excitable. 
E)  all of these answers.

Question 17

Muscle cells are the only cell types that contain intracellular contractile proteins.

Accepted Answer

A) True 
 B)False

Question 18

The origin of a muscle is its

Accepted Answer

A)  main, thick part of this structure. 
B)  middle, thin part of this structure. 
C)  movable end of attachment. 
D)  source of development in the fetus. 
E)  stationary end of attachment. 
A)  main, thick part of this structure. 
B)  middle, thin part of this structure. 
C)  movable end of attachment. 
D)  source of development in the fetus. 
E)  stationary end of attachment.

Question 19

Which of the following statements concerning the characteristics of different types of muscle fibers is incorrect?

Accepted Answer

A)  the higher the ATPase activity, the faster the speed of contraction. 
B)  muscles that have high glycolytic capacity and large glycogen stores are more resistant to fatigue. 
C)  muscles with high ATP-synthesizing ability are more resistant to fatigue. 
D)  oxidative types of muscle fibers contain myoglobin. 
E)  muscle fibers containing large amounts of myoglobin have a dark red color in comparison to the paler fibers, which have little myoglobin. 
A)  the higher the ATPase activity, the faster the speed of contraction. 
B)  muscles that have high glycolytic capacity and large glycogen stores are more resistant to fatigue. 
C)  muscles with high ATP-synthesizing ability are more resistant to fatigue. 
D)  oxidative types of muscle fibers contain myoglobin. 
E)  muscle fibers containing large amounts of myoglobin have a dark red color in comparison to the paler fibers, which have little myoglobin.

Question 20

____________________ is the intracellular signal for contraction.

Accepted Answer

The answer of ____________________ is the intracellular signal for contraction....

The term excitation-contraction coupling refers to the series of events linking signals from the brain to the spinal cord.

Myosin is considered to be a regulatory protein because it plays an important role in the regulation of muscle contraction.

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Is attached to bones.

Which is characteristic of cardiac muscle tissue?

Indicate which bands are being described in each statement by writing the appropriate letter(s) in the blank using the answer code below (more than one answer may apply): -Remains the same size during muscle contraction.

More tension is developed during twitch summation than during a single twitch because the duration of elevated cytosolic Ca²⁺ concentration increases during summation, thus increasing the availability of cross-bridge binding sites.

A(n) ____________________ is a motor neuron and all the muscle fibers it recruits.

The immediate source of additional ATP in muscle fibers is ____________________.

With eccentric muscle contractions,

The oxygen debt is the oxygen a skeletal muscle produces or pays off when it carries out glycolysis.

During contraction, asynchronous cycling of crossbridges

Indicate the characteristics of the muscle-tension receptors using the following answer code: -Monitors change in muscle length.

____________________ provide the most ATP molecules for use by muscle fibers contracting over a long period of time.

Fast-glycolytic muscle fibers do not require as much oxygen use than slow-oxidative fibers.

A functional syncytium

Single-unit smooth muscle

Muscle cells are the only cell types that contain intracellular contractile proteins.

The origin of a muscle is its

Which of the following statements concerning the characteristics of different types of muscle fibers is incorrect?

____________________ is the intracellular signal for contraction.

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Afferent Division and Special Senses

The Peripheral Nervous System: Efferent Division

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood and Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine System

The Reproductive System

Filters

Exam 8: Muscle Physiology

The term excitation-contraction coupling refers to the series of events linking signals from the brain to the spinal cord.

Myosin is considered to be a regulatory protein because it plays an important role in the regulation of muscle contraction.

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Is attached to bones.

Which is characteristic of cardiac muscle tissue?

Indicate which bands are being described in each statement by writing the appropriate letter(s) in the blank using the answer code below (more than one answer may apply): -Remains the same size during muscle contraction.

More tension is developed during twitch summation than during a single twitch because the duration of elevated cytosolic Ca²+ concentration increases during summation, thus increasing the availability of cross-bridge binding sites.

A(n) ____________________ is a motor neuron and all the muscle fibers it recruits.

The immediate source of additional ATP in muscle fibers is ____________________.

With eccentric muscle contractions,

The oxygen debt is the oxygen a skeletal muscle produces or pays off when it carries out glycolysis.

During contraction, asynchronous cycling of crossbridges

Indicate the characteristics of the muscle-tension receptors using the following answer code: -Monitors change in muscle length.

____________________ provide the most ATP molecules for use by muscle fibers contracting over a long period of time.

Fast-glycolytic muscle fibers do not require as much oxygen use than slow-oxidative fibers.

A functional syncytium

Single-unit smooth muscle

Muscle cells are the only cell types that contain intracellular contractile proteins.

The origin of a muscle is its

Which of the following statements concerning the characteristics of different types of muscle fibers is incorrect?

____________________ is the intracellular signal for contraction.

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Afferent Division and Special Senses

The Peripheral Nervous System: Efferent Division

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood and Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine System

The Reproductive System

Filters

More tension is developed during twitch summation than during a single twitch because the duration of elevated cytosolic Ca²⁺ concentration increases during summation, thus increasing the availability of cross-bridge binding sites.