Question 1

A function of tropomyosin is

Accepted Answer

A)  bind Ca2+. 
B)  form attachments with myosin cross bridges. 
C)  prevent myosin cross bridges from attaching to the thin filaments. 
D)  serve as an ATPase. 
E)  none of these answers. 
A)  bind Ca2+. 
B)  form attachments with myosin cross bridges. 
C)  prevent myosin cross bridges from attaching to the thin filaments. 
D)  serve as an ATPase. 
E)  none of these answers.

Question 2

The functional unit of skeletal muscle is a(n) ____________________.

Accepted Answer

The answer of The functional unit of skeletal muscle is...

Question 3

Which of the following statements concerning smooth muscle is incorrect?

Accepted Answer

A)  smooth muscle can develop less tension per unit cross-sectional area compared to skeletal muscle. 
B)  smooth muscle can maintain tension with comparatively less ATP consumption than skeletal muscle. 
C)  smooth muscle lacks troponin and tropomyosin. 
D)  the range of lengths over which smooth muscle is able to develop near maximal tension is much greater than for skeletal muscle. 
E)  a hollow organ enclosed by smooth muscle accommodates variable volumes with little change in the pressure exerted on the contents. 
A)  smooth muscle can develop less tension per unit cross-sectional area compared to skeletal muscle. 
B)  smooth muscle can maintain tension with comparatively less ATP consumption than skeletal muscle. 
C)  smooth muscle lacks troponin and tropomyosin. 
D)  the range of lengths over which smooth muscle is able to develop near maximal tension is much greater than for skeletal muscle. 
E)  a hollow organ enclosed by smooth muscle accommodates variable volumes with little change in the pressure exerted on the contents.

Question 4

Which of the following does not directly influence motor neurons?

Accepted Answer

A)  primary motor cortex. 
B)  cerebellum. 
C)  brain stem. 
D)  basal nuclei 
E)  both (b) and (d) 
A)  primary motor cortex. 
B)  cerebellum. 
C)  brain stem. 
D)  basal nuclei 
E)  both (b) and (d)

Question 5

Energy sources available to form ATP in muscle fibers are 
1.	phosphorylation of ADP by creatine phosphate
2.	oxidative phosphorylation of ADP in the mitochondria
3.	phosphorylation of ADP by the glycolytic pathway in the cytosol

Accepted Answer

A)  (1) and (2) are correct. 
B)  (2) and (3) are correct. 
C)  (1) and (3) are correct. 
D)  (1), (2), and (3) are correct. 
E)  none of these answers. 
A)  (1) and (2) are correct. 
B)  (2) and (3) are correct. 
C)  (1) and (3) are correct. 
D)  (1), (2), and (3) are correct. 
E)  none of these answers.

Question 6

During coactivation

Accepted Answer

A)  all of the muscle fibers in a skeletal muscle are activated simultaneously. 
B)  the gamma motor-neuron and alpha motor-neuron systems to a skeletal muscle are activated simultaneously. 
C)  all of the cross bridges within a single skeletal muscle are activated simultaneously. 
D)  the primary (annulospiral) and secondary (flower-spray) endings within a muscle spindle are activated simultaneously. 
E)  none of these answers. 
A)  all of the muscle fibers in a skeletal muscle are activated simultaneously. 
B)  the gamma motor-neuron and alpha motor-neuron systems to a skeletal muscle are activated simultaneously. 
C)  all of the cross bridges within a single skeletal muscle are activated simultaneously. 
D)  the primary (annulospiral) and secondary (flower-spray) endings within a muscle spindle are activated simultaneously. 
E)  none of these answers.

Question 7

MATCHING: ART
   
The following questions relate to accompanying figure of the three types of muscle tissue. Use the figure to help match the following characteristics with the correct muscle type.
-Striated and involuntary

Accepted Answer

A) Skeletal muscle only 
B) Cardiac muscle only 
C) Smooth muscle only 
D) Skeletal and Cardiac muscle 
E) Cardiac and Smooth muscle
F)All three muscle types 
A) Skeletal muscle only 
B) Cardiac muscle only 
C) Smooth muscle only 
D) Skeletal and Cardiac muscle 
E) Cardiac and Smooth muscle
F)All three muscle types

Question 8

The skeletal muscle shortens during concentric, isotonic contraction.

Accepted Answer

A) True 
 B)False

Question 9

The region between two Z lines is a

Accepted Answer

A)  muscle fiber. 
B)  myofibril. 
C)  myofilament. 
D)  sarcomere. 
E)  sarcoplasmic reticulum. 
A)  muscle fiber. 
B)  myofibril. 
C)  myofilament. 
D)  sarcomere. 
E)  sarcoplasmic reticulum.

Question 10

Match muscle type with correct characteristics.
-skeletal muscle

Accepted Answer

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 
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

Question 11

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 self-excitable.

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 12

Describe the role calcium has in the contraction of the sarcomere in skeletal and smooth muscle tissues.

Accepted Answer

Calcium is the link between excitation a

Question 13

During muscle contraction, the A band becomes shorter.

Accepted Answer

A) True 
 B)False

Question 14

Describe how summations occurs in muscle cells.

Accepted Answer

Twitch summation and tetanus can be achi

Question 15

The source of calcium in smooth muscle is the ____________________.

Accepted Answer

The answer of The source of calcium in smooth muscle...

Question 16

The strength and rate of contraction of the heart can be influenced by the autonomic nervous system.

Accepted Answer

A) True 
 B)False

Question 17

ATP expenditure is required for both contraction and relaxation of a muscle fiber.

Accepted Answer

A) True 
 B)False

Question 18

All skeletal muscles are attached to the skeleton.

Accepted Answer

A) True 
 B)False

Question 19

Indicate which of the characteristics in question apply to each of the muscle fiber types by using the following answer code (more than one answer may apply):
-Is the most powerful fiber.

Accepted Answer

A) slow-oxidative fiber 
B) fast-oxidative fiber 
C) fast-glycolytic fiber 
A) slow-oxidative fiber 
B) fast-oxidative fiber 
C) fast-glycolytic fiber

Question 20

Match sarcomere component with correct characteristic.
-Light band.

Accepted Answer

A) Z line 
B) A band 
C) I band 
D) H zone 
A) Z line 
B) A band 
C) I band 
D) H zone

A function of tropomyosin is

The functional unit of skeletal muscle is a(n) ____________________.

Which of the following statements concerning smooth muscle is incorrect?

Which of the following does not directly influence motor neurons?

Energy sources available to form ATP in muscle fibers are 1. phosphorylation of ADP by creatine phosphate 2. oxidative phosphorylation of ADP in the mitochondria 3. phosphorylation of ADP by the glycolytic pathway in the cytosol

During coactivation

MATCHING: ART The following questions relate to accompanying figure of the three types of muscle tissue. Use the figure to help match the following characteristics with the correct muscle type. -Striated and involuntary

The skeletal muscle shortens during concentric, isotonic contraction.

The region between two Z lines is a

Match muscle type with correct characteristics. -skeletal muscle

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 self-excitable.

Describe the role calcium has in the contraction of the sarcomere in skeletal and smooth muscle tissues.

During muscle contraction, the A band becomes shorter.

Describe how summations occurs in muscle cells.

The source of calcium in smooth muscle is the ____________________.

The strength and rate of contraction of the heart can be influenced by the autonomic nervous system.

ATP expenditure is required for both contraction and relaxation of a muscle fiber.

All skeletal muscles are attached to the skeleton.

Indicate which of the characteristics in question apply to each of the muscle fiber types by using the following answer code (more than one answer may apply): -Is the most powerful fiber.

Match sarcomere component with correct characteristic. -Light band.

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

A function of tropomyosin is

The functional unit of skeletal muscle is a(n) ____________________.

Which of the following statements concerning smooth muscle is incorrect?

Which of the following does not directly influence motor neurons?

Energy sources available to form ATP in muscle fibers are 1. phosphorylation of ADP by creatine phosphate 2. oxidative phosphorylation of ADP in the mitochondria 3. phosphorylation of ADP by the glycolytic pathway in the cytosol

During coactivation

MATCHING: ART The following questions relate to accompanying figure of the three types of muscle tissue. Use the figure to help match the following characteristics with the correct muscle type. -Striated and involuntary

The skeletal muscle shortens during concentric, isotonic contraction.

The region between two Z lines is a

Match muscle type with correct characteristics. -skeletal muscle

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 self-excitable.

Describe the role calcium has in the contraction of the sarcomere in skeletal and smooth muscle tissues.

During muscle contraction, the A band becomes shorter.

Describe how summations occurs in muscle cells.

The source of calcium in smooth muscle is the ____________________.

The strength and rate of contraction of the heart can be influenced by the autonomic nervous system.

ATP expenditure is required for both contraction and relaxation of a muscle fiber.

All skeletal muscles are attached to the skeleton.

Indicate which of the characteristics in question apply to each of the muscle fiber types by using the following answer code (more than one answer may apply): -Is the most powerful fiber.

Match sarcomere component with correct characteristic. -Light band.

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