Question 1

The area between Z lines is the

Accepted Answer

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

Question 2

When myosin cycling generates less tension than the load,

Accepted Answer

A)  an oxygen debt is repaid. 
B)  fatigue occurs. 
C)  relaxation occurs. 
D)  tetany occurs. 
E)  atrophy occurs. 
A)  an oxygen debt is repaid. 
B)  fatigue occurs. 
C)  relaxation occurs. 
D)  tetany occurs. 
E)  atrophy occurs.

Question 3

Myasthenia gravis is an autoimmune disorder in which antibodies attack acetylcholine receptors. The resulting muscle weakness is likely due to

Accepted Answer

A)  increasing the amount of acetylcholinesterase in the synapse. 
B)  making the cells less permeable to sodium ions. 
C)  increasing the amount of potassium ion in the intercellular fluid. 
D)  making the plasma membranes more permeable to calcium ion. 
E)  antibodies competing with acetylcholinesterase for acetylcholine. 
A)  increasing the amount of acetylcholinesterase in the synapse. 
B)  making the cells less permeable to sodium ions. 
C)  increasing the amount of potassium ion in the intercellular fluid. 
D)  making the plasma membranes more permeable to calcium ion. 
E)  antibodies competing with acetylcholinesterase for acetylcholine.

Question 4

Which of the following is an muscular adaptation as a result of exercise?

Accepted Answer

A)  Muscle fibers become smaller in diameter. 
B)  Muscles become less elastic. 
C)  Muscles fatigue more rapidly. 
D)  Muscle fibers increase their reserves of glycogen. 
E)  Muscle fibers become less efficient. 
A)  Muscle fibers become smaller in diameter. 
B)  Muscles become less elastic. 
C)  Muscles fatigue more rapidly. 
D)  Muscle fibers increase their reserves of glycogen. 
E)  Muscle fibers become less efficient.

Question 5

Which of the following muscles contracts when grasping an object in the hand?

Accepted Answer

A)  palmaris longus 
B)  flexor digitorum 
C)  extensor carpi radialis 
D)  pronator teres 
E)  supinator 
A)  palmaris longus 
B)  flexor digitorum 
C)  extensor carpi radialis 
D)  pronator teres 
E)  supinator

Question 6

Using the figure above, identify the labeled part.
-Label D: ________

Accepted Answer

The answer of   Using the figure above, identify...

Question 7

Calcium ions are released from the sarcoplasmic reticulum during the ________ phase of contraction.

Accepted Answer

A)  latent 
B)  contraction 
C)  twitch 
D)  relaxation 
E)  recovery 
A)  latent 
B)  contraction 
C)  twitch 
D)  relaxation 
E)  recovery

Question 8

Which type of scenario is most likely?

Accepted Answer

A)  Small motor units are recruited first. 
B)  Large motor units are recruited first. 
C)  Intermediate-sized motor units are recruited first. 
D)  All motor units are recruited. 
E)  The brain chooses motor units randomly. 
A)  Small motor units are recruited first. 
B)  Large motor units are recruited first. 
C)  Intermediate-sized motor units are recruited first. 
D)  All motor units are recruited. 
E)  The brain chooses motor units randomly.

Question 9

The advantage of having many nuclei in a skeletal muscle fiber is

Accepted Answer

A)  the ability to contract. 
B)  the ability to produce more ATP with little oxygen. 
C)  the ability to repair the fiber after an injury. 
D)  the ability to produce large amounts of the enzymes and structural proteins needed for contraction. 
E)  none of the above 
A)  the ability to contract. 
B)  the ability to produce more ATP with little oxygen. 
C)  the ability to repair the fiber after an injury. 
D)  the ability to produce large amounts of the enzymes and structural proteins needed for contraction. 
E)  none of the above

Question 10

Which of the following statements describes how muscles help maintain homeostasis?

Accepted Answer

A)  The contractions of skeletal muscles pull on tendons and move elements of the skeleton. 
B)  Skeletal muscles are responsible for guarding the openings of the digestive and urinary tracts. 
C)  Skeletal muscles are responsible for the pumping action of the heart. 
D)  Skeletal muscles support the weight of some internal organs. 
E)  Skeletal muscle contractions help maintain body temperature. 
A)  The contractions of skeletal muscles pull on tendons and move elements of the skeleton. 
B)  Skeletal muscles are responsible for guarding the openings of the digestive and urinary tracts. 
C)  Skeletal muscles are responsible for the pumping action of the heart. 
D)  Skeletal muscles support the weight of some internal organs. 
E)  Skeletal muscle contractions help maintain body temperature.

Question 11

What is the function of the transverse tubule?

Accepted Answer

A)  the storage of calcium ions 
B)  to transmit muscle impulses to the cell's interior 
C)  to store sodium ions 
D)  to allow cross-bridge attachment 
E)  all of the above 
A)  the storage of calcium ions 
B)  to transmit muscle impulses to the cell's interior 
C)  to store sodium ions 
D)  to allow cross-bridge attachment 
E)  all of the above

Question 12

An example of partial but sustained contraction is

Accepted Answer

A)  treppe. 
B)  tetany. 
C)  muscle tone. 
D)  fatigue. 
E)  a twitch. 
A)  treppe. 
B)  tetany. 
C)  muscle tone. 
D)  fatigue. 
E)  a twitch.

Question 13

A muscle that inserts on the radial tuberosity is most likely involved in

Accepted Answer

A)  elbow flexion. 
B)  elbow extension. 
C)  protraction. 
D)  pronation. 
E)  elbow abduction. 
A)  elbow flexion. 
B)  elbow extension. 
C)  protraction. 
D)  pronation. 
E)  elbow abduction.

Question 14

Which of the following is considered a postural muscle?

Accepted Answer

A)  erector spinae 
B)  biceps brachii 
C)  triceps brachii 
D)  rectus femoris 
E)  hamstrings 
A)  erector spinae 
B)  biceps brachii 
C)  triceps brachii 
D)  rectus femoris 
E)  hamstrings

Question 15

When a calcium ion binds to troponin,

Accepted Answer

A)  tropomyosin moves out of the groove between the actin molecules. 
B)  active sites on the myosin are exposed. 
C)  actin heads will bind to myosin. 
D)  muscle relaxation occurs. 
E)  all of the above 
A)  tropomyosin moves out of the groove between the actin molecules. 
B)  active sites on the myosin are exposed. 
C)  actin heads will bind to myosin. 
D)  muscle relaxation occurs. 
E)  all of the above

Question 16

Using the figure above, identify the labeled part.
-Label F: ________

Accepted Answer

The answer of   Using the figure above, identify...

Question 17

Compared to skeletal muscle, smooth muscle

Accepted Answer

A)  contracts faster. 
B)  relaxes faster. 
C)  contracts and relaxes faster. 
D)  contracts faster and relaxes more slowly. 
E)  contracts and relaxes more slowly. 
A)  contracts faster. 
B)  relaxes faster. 
C)  contracts and relaxes faster. 
D)  contracts faster and relaxes more slowly. 
E)  contracts and relaxes more slowly.

Question 18

A resting muscle generates most of its ATP by

Accepted Answer

A)  conversion of creatine phosphate. 
B)  anaerobic respiration. 
C)  aerobic respiration. 
D)  the tricarboxylic acid cycle. 
E)  both C and D 
A)  conversion of creatine phosphate. 
B)  anaerobic respiration. 
C)  aerobic respiration. 
D)  the tricarboxylic acid cycle. 
E)  both C and D

Question 19

Creatine phosphate serves to

Accepted Answer

A)  cause the decomposition of ATP. 
B)  supply energy to synthesize ATP. 
C)  decompose ADP. 
D)  synthesize ADP. 
E)  synthesize glucose. 
A)  cause the decomposition of ATP. 
B)  supply energy to synthesize ATP. 
C)  decompose ADP. 
D)  synthesize ADP. 
E)  synthesize glucose.

Question 20

A sheath of connective tissue surrounding a bundle of striated muscle fibers is called _________________________.

Accepted Answer

The answer of A sheath of connective tissue surrounding a...

The area between Z lines is the

When myosin cycling generates less tension than the load,

Myasthenia gravis is an autoimmune disorder in which antibodies attack acetylcholine receptors. The resulting muscle weakness is likely due to

Which of the following is an muscular adaptation as a result of exercise?

Which of the following muscles contracts when grasping an object in the hand?

Using the figure above, identify the labeled part. -Label D: ________

Calcium ions are released from the sarcoplasmic reticulum during the ________ phase of contraction.

Which type of scenario is most likely?

The advantage of having many nuclei in a skeletal muscle fiber is

Which of the following statements describes how muscles help maintain homeostasis?

What is the function of the transverse tubule?

An example of partial but sustained contraction is

A muscle that inserts on the radial tuberosity is most likely involved in

Which of the following is considered a postural muscle?

When a calcium ion binds to troponin,

Using the figure above, identify the labeled part. -Label F: ________

Compared to skeletal muscle, smooth muscle

A resting muscle generates most of its ATP by

Creatine phosphate serves to

A sheath of connective tissue surrounding a bundle of striated muscle fibers is called _________________________.

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphoid System and Immunity

The Respiratory System

The Digestive System

Nutrition and Metabolism

The Urinary System

The Reproductive System

Development and Inheritance

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Exam 7: The Muscular System

The area between Z lines is the

When myosin cycling generates less tension than the load,

Myasthenia gravis is an autoimmune disorder in which antibodies attack acetylcholine receptors. The resulting muscle weakness is likely due to

Which of the following is an muscular adaptation as a result of exercise?

Which of the following muscles contracts when grasping an object in the hand?

Using the figure above, identify the labeled part. -Label D: ________

Calcium ions are released from the sarcoplasmic reticulum during the ________ phase of contraction.

Which type of scenario is most likely?

The advantage of having many nuclei in a skeletal muscle fiber is

Which of the following statements describes how muscles help maintain homeostasis?

What is the function of the transverse tubule?

An example of partial but sustained contraction is

A muscle that inserts on the radial tuberosity is most likely involved in

Which of the following is considered a postural muscle?

When a calcium ion binds to troponin,

Using the figure above, identify the labeled part. -Label F: ________

Compared to skeletal muscle, smooth muscle

A resting muscle generates most of its ATP by

Creatine phosphate serves to

A sheath of connective tissue surrounding a bundle of striated muscle fibers is called _________________________.

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphoid System and Immunity

The Respiratory System

The Digestive System

Nutrition and Metabolism

The Urinary System

The Reproductive System

Development and Inheritance

Filters