Question 1

Match each term with its corresponding definition or description.
-beadlike globular protein that makes up the thin myofilament

Accepted Answer

A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit 
A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit

Question 2

Which of the following is not a factor in why a warm muscle contracts more forcefully than a cool muscle?

Accepted Answer

A)  ATP releases energy faster. 
B)  Calcium diffuses through the sarcoplasm more quickly. 
C)  Calcium tends to accumulate in the sarcoplasm. 
D)  All of the above are factors. 
A)  ATP releases energy faster. 
B)  Calcium diffuses through the sarcoplasm more quickly. 
C)  Calcium tends to accumulate in the sarcoplasm. 
D)  All of the above are factors.

Question 3

Define rigor mortis.Why does it occur?

Accepted Answer

Rigor mortis is a postmortem condition c

Question 4

During which phase of the twitch contraction is there a triggering of the release of calcium ions into the sarcoplasm?

Accepted Answer

A)  Latent period 
B)  Contraction phase 
C)  Relaxation phase 
D)  None of the above 
A)  Latent period 
B)  Contraction phase 
C)  Relaxation phase 
D)  None of the above

Question 5

After it is released from the sarcoplasmic reticulum,the calcium combines with which protein?

Accepted Answer

A)  Troponin 
B)  Actin 
C)  Myosin 
D)  Tropomyosin 
A)  Troponin 
B)  Actin 
C)  Myosin 
D)  Tropomyosin

Question 6

Match each term with its corresponding definition or description.
-a segment of the myofilament between two Z-lines

Accepted Answer

A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit 
A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit

Question 7

Which of the following are incorrect statements about motor units?

Accepted Answer

A)  Some motor neurons stimulate only a few dozen muscle fibers. 
B)  Some motor neurons stimulate a few thousand muscle fibers. 
C)  The more muscle fibers stimulated by a motor neuron, the more precise the movements of that muscle can be. 
D)  All of the above statements are correct. 
A)  Some motor neurons stimulate only a few dozen muscle fibers. 
B)  Some motor neurons stimulate a few thousand muscle fibers. 
C)  The more muscle fibers stimulated by a motor neuron, the more precise the movements of that muscle can be. 
D)  All of the above statements are correct.

Question 8

A sarcomere is a segment of myofibril between two successive:

Accepted Answer

A)  Z-lines. 
B)  A-bands. 
C)  I-bands. 
D)  H-bands. 
A)  Z-lines. 
B)  A-bands. 
C)  I-bands. 
D)  H-bands.

Question 9

Sarcolemma is a:

Accepted Answer

A)  system of transverse tubules that extend at a right angle to the long axis of the cell. 
B)  segment of the myofibril between two successive Z-lines. 
C)  unique name for the plasma membrane of a muscle fiber. 
D)  None of the above are correct. 
A)  system of transverse tubules that extend at a right angle to the long axis of the cell. 
B)  segment of the myofibril between two successive Z-lines. 
C)  unique name for the plasma membrane of a muscle fiber. 
D)  None of the above are correct.

Question 10

Skeletal muscles are innervated by:

Accepted Answer

A)  somatic motor neurons. 
B)  autonomic motor neurons. 
C)  both somatic and autonomic motor neurons. 
D)  internal stimulation. 
A)  somatic motor neurons. 
B)  autonomic motor neurons. 
C)  both somatic and autonomic motor neurons. 
D)  internal stimulation.

Question 11

Explain the role of ATP in muscle contraction.

Accepted Answer

ATP, or adenosine triphosphate, plays a

Question 12

Match each term with its corresponding definition or description.
-the ability of a muscle cell to be stimulated or excited

Accepted Answer

A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit 
A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit

Question 13

List three conditions that influence the strength of muscle contraction.

Accepted Answer

The strength of muscle contraction can b

Question 14

A motor unit is most correctly described as a _____ and a motor neuron.

Accepted Answer

A)  sarcomere(s) 
B)  myofibril(s) 
C)  muscle fiber(s) 
D)  filament(s) 
A)  sarcomere(s) 
B)  myofibril(s) 
C)  muscle fiber(s) 
D)  filament(s)

Question 15

The myofilament that can be described as a globular protein strung together like beads to form two intertwined strands is:

Accepted Answer

A)  troponin. 
B)  actin. 
C)  myosin. 
D)  tropomyosin. 
A)  troponin. 
B)  actin. 
C)  myosin. 
D)  tropomyosin.

Question 16

The substance that attracts oxygen in the myoglobin molecule is:

Accepted Answer

A)  hemoglobin. 
B)  calcium. 
C)  iron. 
D)  ATP. 
A)  hemoglobin. 
B)  calcium. 
C)  iron. 
D)  ATP.

Question 17

Which of the following is not an end-product of the breakdown of ATP?

Accepted Answer

A)  An inorganic phosphate 
B)  Energy that can be used in muscle contraction 
C)  ADP 
D)  All of the above are end-products of the breakdown of ATP. 
A)  An inorganic phosphate 
B)  Energy that can be used in muscle contraction 
C)  ADP 
D)  All of the above are end-products of the breakdown of ATP.

Question 18

Match each term with its corresponding definition or description.
-protein that looks like "bundled golf clubs;" makes up the thick myofilament

Accepted Answer

A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit 
A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit

Question 19

Endurance training is also known as:

Accepted Answer

A)  isometrics. 
B)  hypertrophy. 
C)  aerobic training. 
D)  strength training. 
A)  isometrics. 
B)  hypertrophy. 
C)  aerobic training. 
D)  strength training.

Question 20

Match each term with its corresponding description regarding the sliding filament theory.
-compound that supplies the energy for muscle contraction

Accepted Answer

A) Troponin 
B) Myosin 
C) Actin 
D) T-tubules 
E) ATP
F)Calcium
G)Cross-bridges
H)Tropomyosin
I)Acetylcholine 
A) Troponin 
B) Myosin 
C) Actin 
D) T-tubules 
E) ATP
F)Calcium
G)Cross-bridges
H)Tropomyosin
I)Acetylcholine

Exam 12: B: Physiology of the Muscular System

Match each term with its corresponding definition or description. -beadlike globular protein that makes up the thin myofilament

Which of the following is not a factor in why a warm muscle contracts more forcefully than a cool muscle?

Define rigor mortis.Why does it occur?

During which phase of the twitch contraction is there a triggering of the release of calcium ions into the sarcoplasm?

After it is released from the sarcoplasmic reticulum,the calcium combines with which protein?

Match each term with its corresponding definition or description. -a segment of the myofilament between two Z-lines

Which of the following are incorrect statements about motor units?

A sarcomere is a segment of myofibril between two successive:

Sarcolemma is a:

Skeletal muscles are innervated by:

Explain the role of ATP in muscle contraction.

Match each term with its corresponding definition or description. -the ability of a muscle cell to be stimulated or excited

List three conditions that influence the strength of muscle contraction.

A motor unit is most correctly described as a _____ and a motor neuron.

The myofilament that can be described as a globular protein strung together like beads to form two intertwined strands is:

The substance that attracts oxygen in the myoglobin molecule is:

Which of the following is not an end-product of the breakdown of ATP?

Match each term with its corresponding definition or description. -protein that looks like "bundled golf clubs;" makes up the thick myofilament

Endurance training is also known as:

Match each term with its corresponding description regarding the sliding filament theory. -compound that supplies the energy for muscle contraction

A: Organization of the Body

B: Organization of the Body

A: The Chemical Basis of Life

B: The Chemical Basis of Life

A: Anatomy of Cells

B: Anatomy of Cells

Physiology of Cells

Cell Growth and Reproduction

Tissues

A: Skin and Its Appendages

B: Skin and Its Appendages

A: Skeletal Tissues

B: Skeletal Tissues

Skeletal System

A: Articulations

B: Articulations

A: Anatomy of the Muscular System

B: Anatomy of the Muscular System

A: Physiology of the Muscular System

A: Nervous System Cells

B: Nervous System Cells

A: Central Nervous System

B: Central Nervous System

Peripheral Nervous System

Autonomic Nervous System

A: Sense Organs

B: Sense Organs

Endocrine System

Endocrine Glands

Blood

Anatomy of the Cardiovascular System

A: Physiology of the Cardiovascular System

B: Physiology of the Cardiovascular System

Lymphatic System

A: Immune System

B: Immune System

Stress

Anatomy of the Respiratory System

A: Physiology of the Respiratory System

B: Physiology of the Respiratory System

A: Anatomy of the Digestive System

B: Anatomy of the Digestive System

A: Physiology of the Digestive System

B: Physiology of the Digestive System

A: Nutrition and Metabolism

B: Nutrition and Metabolism

A: Urinary System

B: Urinary System

Fluid and Electrolyte Balance

Acid-Base Balance

Male Reproductive System

A: Female Reproductive System

B: Female Reproductive System

A: Growth and Development

B: Growth and Development

A: Genetics and Heredity

B: Genetics and Heredity

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