Question 1

The gradation of whole-muscle tension depends on the number of ____________________ that are stimulated.

Accepted Answer

muscle fib

Question 2

Muscle cells require ATP in order to relax, following a 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:
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
-Is attached to bones

Accepted Answer

The answer of Indicate which type of muscle is associated...

Question 4

Foot proteins

Accepted Answer

A) span the gap between a lateral sac of the sarcoplasmic reticulum and a T tubule 
B) are believed to serve as Ca₂₊ channels 
C) bind to and pull the thin filaments inward toward the A band's center during contraction 
D) have characteristics a and b 
E) are none of the above 
A) span the gap between a lateral sac of the sarcoplasmic reticulum and a T tubule 
B) are believed to serve as Ca₂₊ channels 
C) bind to and pull the thin filaments inward toward the A band's center during contraction 
D) have characteristics a and b 
E) are none of the above

Question 5

Atrophy can develop in a muscle by either denervation or disuse.

Accepted Answer

A) True 
 B)False

Question 6

Number ____ identifies the functional unit of skeletal muscle.

Accepted Answer

The answer of Number ____ identifies the functional unit of...

Question 7

During muscle contraction, the A band becomes shorter.

Accepted Answer

A) True 
 B)False

Question 8

Single-unit smooth muscle and cardiac muscle are both self-excitable.

Accepted Answer

A) True 
 B)False

Question 9

A single muscle cell is known as a myofibril.

Accepted Answer

A) True 
 B)False

Question 10

Myoglobin

Accepted Answer

A) can store small amounts of O₂ 
B) increases the rate of O₂ transfer from the blood into muscle fibers 
C) is abundant in fast-glycolytic fibers 
D) can perform a and b 
E) has characteristics a and c 
A) can store small amounts of O₂ 
B) increases the rate of O₂ transfer from the blood into muscle fibers 
C) is abundant in fast-glycolytic fibers 
D) can perform a and b 
E) has characteristics a and c

Question 11

A functional syncytium

Accepted Answer

A) is a pair of antagonistic muscles causing a joint to move in opposite directions 
B) is able to contract as a unit because action potentials move between adjacent cells through gap junctions 
C) is a functional junction between a smooth muscle fiber and an autonomic nerve ending 
D) is all of the above 
E) is none of the above 
A) is a pair of antagonistic muscles causing a joint to move in opposite directions 
B) is able to contract as a unit because action potentials move between adjacent cells through gap junctions 
C) is a functional junction between a smooth muscle fiber and an autonomic nerve ending 
D) is all of the above 
E) is none of the above

Question 12

Describe how glycolysis, creatine, and mitochondria are important to a skeletal muscle fiber's ability to obtain energy for contraction.

Accepted Answer

Working skeletal muscles obtain ATP for

Question 13

____________________ ions function as the intracellular signal for contraction.

Accepted Answer

The answer of ____________________ ions function as the intracellular signal...

Question 14

Indicate which of the characteristics in question apply to each of the muscle fiber types by using the following answer code:
a.Slow-oxidative fiber
b.Fast-oxidative fiber
c.Fast-glycolytic fiber
d.Slow-oxidative fiber and fast-oxidative fiber
e.Fast-oxidative fiber and fast-glycolytic fiber
f.Slow-oxidative fiber, fast-oxidative fiber and fast-glycolytic fiber
-Uses up considerable glycogen

Accepted Answer

The answer of Indicate which of the characteristics in question...

Question 15

Pacemaker activity refers to spontaneous depolarizations resulting from

Accepted Answer

A) shifts in passive ionic fluxes accompanying 
B) cyclical changes in Na+-K+ pump activity 
C) automatic changes in channel permeability 
D) both a and b 
E) both a and c 
A) shifts in passive ionic fluxes accompanying 
B) cyclical changes in Na+-K+ pump activity 
C) automatic changes in channel permeability 
D) both a and b 
E) both a and c

Question 16

Match muscle type with the correct characteristics.
a.voluntary, neurogenic, and striated
b.voluntary, neurogenic, and nonstriated
c.involuntary, myogenic, and striated
d.involuntary, neurogenic and nonstriated
e.involuntary, myogenic, and nonstriated
-Single-unit smooth muscle

Accepted Answer

The answer of Match muscle type with the correct characteristics.
a.voluntary,...

Question 17

Actin

Accepted Answer

A) has ATPase activity 
B) are spherical 
C) forms a helical chain that forms the main structural component of the thin filaments 
D) has characteristics a and b 
E) has characteristics b and c 
A) has ATPase activity 
B) are spherical 
C) forms a helical chain that forms the main structural component of the thin filaments 
D) has characteristics a and b 
E) has characteristics b and c

Question 18

Picking up a book at a constant speed requires that

Accepted Answer

A) muscle tension be equal to the book's weight 
B) the muscle perform an eccentric contraction 
C) the muscle perform an isometric contraction 
D) the muscle perform a concentric contraction 
E) both a and d occur 
A) muscle tension be equal to the book's weight 
B) the muscle perform an eccentric contraction 
C) the muscle perform an isometric contraction 
D) the muscle perform a concentric contraction 
E) both a and d occur

Question 19

Indicate which of the characteristics in question apply to each of the muscle fiber types by using the following answer code:
a.Slow-oxidative fiber
b.Fast-oxidative fiber
c.Fast-glycolytic fiber
d.Slow-oxidative fiber and fast-oxidative fiber
e.Fast-oxidative fiber and fast-glycolytic fiber
f.Slow-oxidative fiber, fast-oxidative fiber and fast-glycolytic fiber
-Hypertrophies in response to weight training

Accepted Answer

The answer of Indicate which of the characteristics in question...

Question 20

Conscious initiation of muscle contraction is controlled by

Accepted Answer

A) the spinal cord 
B) the brain stem 
C) the cerebral cortex 
D) the thalamus 
E) none of the above 
A) the spinal cord 
B) the brain stem 
C) the cerebral cortex 
D) the thalamus 
E) none of the above

The gradation of whole-muscle tension depends on the number of ____________________ that are stimulated.

Muscle cells require ATP in order to relax, following a contraction.

Foot proteins

Atrophy can develop in a muscle by either denervation or disuse.

Number ____ identifies the functional unit of skeletal muscle.

During muscle contraction, the A band becomes shorter.

Single-unit smooth muscle and cardiac muscle are both self-excitable.

A single muscle cell is known as a myofibril.

Myoglobin

A functional syncytium

Describe how glycolysis, creatine, and mitochondria are important to a skeletal muscle fiber's ability to obtain energy for contraction.

____________________ ions function as the intracellular signal for contraction.

Pacemaker activity refers to spontaneous depolarizations resulting from

Match muscle type with the correct characteristics. a.voluntary, neurogenic, and striated b.voluntary, neurogenic, and nonstriated c.involuntary, myogenic, and striated d.involuntary, neurogenic and nonstriated e.involuntary, myogenic, and nonstriated -Single-unit smooth muscle

Actin

Picking up a book at a constant speed requires that

Conscious initiation of muscle contraction is controlled by

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 Special Senses

The Peripheral Nervous System: Efferent Division

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

Principles of Endocrinology: the Central Endocrine Glands

The Peripheral Endocrine Glands

The Reproductive System

Filters

Exam 8: Muscle Physiology

The gradation of whole-muscle tension depends on the number of ____________________ that are stimulated.

Muscle cells require ATP in order to relax, following a contraction.

Foot proteins

Atrophy can develop in a muscle by either denervation or disuse.

Number ____ identifies the functional unit of skeletal muscle.

During muscle contraction, the A band becomes shorter.

Single-unit smooth muscle and cardiac muscle are both self-excitable.

A single muscle cell is known as a myofibril.

Myoglobin

A functional syncytium

Describe how glycolysis, creatine, and mitochondria are important to a skeletal muscle fiber's ability to obtain energy for contraction.

____________________ ions function as the intracellular signal for contraction.

Pacemaker activity refers to spontaneous depolarizations resulting from

Match muscle type with the correct characteristics. a.voluntary, neurogenic, and striated b.voluntary, neurogenic, and nonstriated c.involuntary, myogenic, and striated d.involuntary, neurogenic and nonstriated e.involuntary, myogenic, and nonstriated -Single-unit smooth muscle

Actin

Picking up a book at a constant speed requires that

Conscious initiation of muscle contraction is controlled by

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 Special Senses

The Peripheral Nervous System: Efferent Division

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

Principles of Endocrinology: the Central Endocrine Glands

The Peripheral Endocrine Glands

The Reproductive System

Filters