Question 1

Interactions between actin and myosin filaments of the sarcomere are responsible for

Accepted Answer

A) muscle fatigue. 
B) the conduction of neural stimulation to the muscle fiber. 
C) muscle contraction. 
D) muscle relaxation. 
E) the striped appearance of skeletal muscle. 
A) muscle fatigue. 
B) the conduction of neural stimulation to the muscle fiber. 
C) muscle contraction. 
D) muscle relaxation. 
E) the striped appearance of skeletal muscle.

Question 2

The region of the sarcomere containing the thick filaments is the

Accepted Answer

A) Z line. 
B) M line. 
C) H band. 
D) A band. 
E) I band. 
A) Z line. 
B) M line. 
C) H band. 
D) A band. 
E) I band.

Question 3

The area in the center of the A band that contains no thin filaments is the

Accepted Answer

A) Z line. 
B) M line. 
C) H band. 
D) I band. 
E) zone of overlap. 
A) Z line. 
B) M line. 
C) H band. 
D) I band. 
E) zone of overlap.

Question 4

Which of the following types of muscle fibers are best adapted for prolonged contraction such as standing all day?

Accepted Answer

A) uninucleated fibers 
B) striated fibers 
C) fast fibers 
D) slow fibers 
E) intermediate fibers 
A) uninucleated fibers 
B) striated fibers 
C) fast fibers 
D) slow fibers 
E) intermediate fibers

Question 5

Triggering of the muscle action potential occurs after

Accepted Answer

A) acetylcholine binds to chemically-gated channels in the motor end plate. 
B) acetylcholinesterase is released from synaptic vesicles into the synaptic cleft. 
C) calcium ion binds to channels on the motor end plate. 
D) the action potential jumps across the neuromuscular junction. 
E) Any of these can produce an action potential in the muscle cell. 
A) acetylcholine binds to chemically-gated channels in the motor end plate. 
B) acetylcholinesterase is released from synaptic vesicles into the synaptic cleft. 
C) calcium ion binds to channels on the motor end plate. 
D) the action potential jumps across the neuromuscular junction. 
E) Any of these can produce an action potential in the muscle cell.

Question 6

Many visceral smooth muscle cells lack motor neuron innervation.How are their contractions coordinated and controlled?

Accepted Answer

Gap junctions interconnect visceral smoo

Question 7

When a muscle is stimulated repeatedly at a high rate,the amount of tension gradually increases to a steady maximum tension.This state of maximum tension is called

Accepted Answer

A) incomplete tetanus. 
B) complete tetanus. 
C) a twitch. 
D) wave summation. 
E) recruitment. 
A) incomplete tetanus. 
B) complete tetanus. 
C) a twitch. 
D) wave summation. 
E) recruitment.

Question 8

A hypothetical genetic disease causes the body to produce antibodies that compete with acetylcholine for receptors on the motor end plate.Patients with this disease exhibit varying degrees of muscle weakness in the affected muscles.If you could administer a drug that inhibits acetylcholinesterase or a drug that blocks acetylcholine,which one would you use to alleviate these symptoms?

Accepted Answer

This is a case of competition between ac

Question 9

Muscle tissue,one of the four basic tissue groups,consists chiefly of cells that are highly specialized for

Accepted Answer

A) conduction. 
B) contraction. 
C) peristalsis. 
D) cushioning. 
E) secretion. 
A) conduction. 
B) contraction. 
C) peristalsis. 
D) cushioning. 
E) secretion.

Question 10

When comparing slow muscle fibers to fast muscle fibers,slow fibers

Accepted Answer

A) take about three times as long to reach peak tension. 
B) have much smaller fiber diameters. 
C) generate much less tension. 
D) are rich in the red protein myoglobin. 
E) All of the answers are correct. 
A) take about three times as long to reach peak tension. 
B) have much smaller fiber diameters. 
C) generate much less tension. 
D) are rich in the red protein myoglobin. 
E) All of the answers are correct.

Question 11

Each skeletal muscle fiber is controlled by a motor neuron at a single

Accepted Answer

A) synaptic knob. 
B) sarcomere. 
C) neuromuscular junction. 
D) synaptic cleft. 
E) transverse tubule. 
A) synaptic knob. 
B) sarcomere. 
C) neuromuscular junction. 
D) synaptic cleft. 
E) transverse tubule.

Question 12

In a sarcomere,cross-bridge attachment occurs specifically in the

Accepted Answer

A) zone of overlap. 
B) A band. 
C) I band. 
D) M line. 
E) H band. 
A) zone of overlap. 
B) A band. 
C) I band. 
D) M line. 
E) H band.

Question 13

In a sarcomere,the central portion of thick filaments are linked laterally by proteins of the

Accepted Answer

A) Z line. 
B) M line. 
C) H band. 
D) A band. 
E) I band. 
A) Z line. 
B) M line. 
C) H band. 
D) A band. 
E) I band.

Question 14

The increase in muscle tension that is produced by increasing the number of active motor units is called

Accepted Answer

A) incomplete tetanus. 
B) complete tetanus. 
C) treppe. 
D) wave summation. 
E) recruitment. 
A) incomplete tetanus. 
B) complete tetanus. 
C) treppe. 
D) wave summation. 
E) recruitment.

Question 15

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

Accepted Answer

A) contract much more forcefully. 
B) produce more ATP with little oxygen. 
C) store extra DNA for metabolism. 
D) produce large amounts of muscle proteins. 
E) produce nutrients for muscle contraction. 
A) contract much more forcefully. 
B) produce more ATP with little oxygen. 
C) store extra DNA for metabolism. 
D) produce large amounts of muscle proteins. 
E) produce nutrients for muscle contraction.

Question 16

The rapid rise and fall in force produced by a muscle fiber after a single action potential is a(n)

Accepted Answer

A) tetanus. 
B) unfused tetanus. 
C) twitch. 
D) motor end plate potential. 
E) muscle action potential. 
A) tetanus. 
B) unfused tetanus. 
C) twitch. 
D) motor end plate potential. 
E) muscle action potential.

Question 17

Figure 10-1 Skeletal Muscle Fiber
Use Figure 10-1 to answer the following questions:
-Identify the structure where ATP is produced.

Accepted Answer

A) 6 
B) 7 
C) 1 
D) 3 
E) 2 
A) 6 
B) 7 
C) 1 
D) 3 
E) 2

Question 18

Receptors for acetylcholine are located on the

Accepted Answer

A) synaptic knob. 
B) motor end plate. 
C) sarcomere. 
D) synaptic cleft. 
E) transverse tubule. 
A) synaptic knob. 
B) motor end plate. 
C) sarcomere. 
D) synaptic cleft. 
E) transverse tubule.

Question 19

Which of the following is a recognized function of skeletal muscle?

Accepted Answer

A) produce movement 
B) maintain posture 
C) maintain body temperature 
D) guard body entrances and exits 
E) All of the answers are correct. 
A) produce movement 
B) maintain posture 
C) maintain body temperature 
D) guard body entrances and exits 
E) All of the answers are correct.

Question 20

Figure 10-2 Muscle Contractions
Use Figure 10-2 to answer the following questions:
-To produce a contraction similar to the one in graph (b),the muscle

Accepted Answer

A) must be stimulated to the point of fatigue. 
B) must be stimulated again before it has relaxed from the previous stimulation. 
C) is excited by a stimulus of increasing intensity. 
D) must go through a rapid series of isolated twitches. 
E) generates more and more thin and thick filaments. 
A) must be stimulated to the point of fatigue. 
B) must be stimulated again before it has relaxed from the previous stimulation. 
C) is excited by a stimulus of increasing intensity. 
D) must go through a rapid series of isolated twitches. 
E) generates more and more thin and thick filaments.

Exam 10: Muscle Tissue

Interactions between actin and myosin filaments of the sarcomere are responsible for

The region of the sarcomere containing the thick filaments is the

The area in the center of the A band that contains no thin filaments is the

Which of the following types of muscle fibers are best adapted for prolonged contraction such as standing all day?

Triggering of the muscle action potential occurs after

Many visceral smooth muscle cells lack motor neuron innervation.How are their contractions coordinated and controlled?

When a muscle is stimulated repeatedly at a high rate,the amount of tension gradually increases to a steady maximum tension.This state of maximum tension is called

Muscle tissue,one of the four basic tissue groups,consists chiefly of cells that are highly specialized for

When comparing slow muscle fibers to fast muscle fibers,slow fibers

Each skeletal muscle fiber is controlled by a motor neuron at a single

In a sarcomere,cross-bridge attachment occurs specifically in the

In a sarcomere,the central portion of thick filaments are linked laterally by proteins of the

The increase in muscle tension that is produced by increasing the number of active motor units is called

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

The rapid rise and fall in force produced by a muscle fiber after a single action potential is a(n)

Figure 10-1 Skeletal Muscle Fiber Use Figure 10-1 to answer the following questions: -Identify the structure where ATP is produced.

Receptors for acetylcholine are located on the

Which of the following is a recognized function of skeletal muscle?

Figure 10-2 Muscle Contractions Use Figure 10-2 to answer the following questions: -To produce a contraction similar to the one in graph (b),the muscle

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Joints

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Sensory Pathways and the Somatic Nervous System

The Autonomic Nervous System and Higher-Order Functions

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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