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Test Bank for Fundamentals of Anatomy and Physiology 8th Edition by

Martini Sample

Chapter 10 Muscle Tissue

Multiple Choice Questions

1)

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

A) produce movement

B)maintain posture

C) maintain body temperature

D) guard body entrances and exits

E) all of the above

2)

Which of the following statements is incorrect?

A) The contractions of skeletal muscles pull on tendons and move bones of the skeleton

1 B) Skeletal muscles store nutrient reserves

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

Nerves and blood vessels that service the muscle fibers are located in

the connective tissues of the

A) endomysium

B) perimysium

C) sarcolemma

have many nuclei

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

repeating unit of striated myofibrils

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

Level 2 Questions: Reviewing Concepts

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

Level 1 Questions: Reviewing Facts and Terms

diffusion of calcium out of the cell

high amounts of oxygen

generate much less tension

all of the above

The thin filaments of smooth muscle fibers are attached to dense bodies

none of the above

All of these are well known

all of the above

all of the above

All are true

Relaxation requires uptake of calcium ion by the sarcoplasmic reticulum

the Z lines move closer together

Level 2 Questions: Reviewing Concepts

a rich blood supply

Level 2 Questions: Reviewing Concepts

decreased width of the H band during contraction

Level 2 Questions: Reviewing Concepts

the concentration of calcium ion in the sarcoplasmic reticulum of a resting muscle

The following is a list of the events that occur during a muscle contraction

Myosin cross-bridges bind to the actin

The free myosin head splits ATP

Calcium ion is released from the sarcoplasmic reticulum

The myosin head pivots toward the center of the sarcomere

Calcium ion binds to troponin

The myosin head binds an ATP molecule and detaches from the actin

The correct sequence of these events is

more permeable to calcium ions

an increase in intracellular lactate

It would cause an increase in muscle mass

It would produce uncontrolled muscle spasms

Level 3 Questions: Critical Thinking & Clinical Applications

loss of acetylcholine receptors in the end-plate membrane

Level 3 Questions: Critical Thinking & Clinical Applications

Level 1 Questions: Reviewing Facts and Terms

Figure 10-1 Skeletal Muscle Fiber

Use Figure 10-1 to answer the following questions:

102)

What is released from the structure labeled “9”?

Level 2 Questions: Reviewing Concepts

Figure 10-2 Muscle Contractions

Use Figure 10-2 to answer the following questions:

gradually warms up

The muscle is starting to fatigue

Level 2 Questions: Reviewing Concepts

Level 2 Questions: Reviewing Concepts

It is producing more ATP as tension increases

Answer:

B

Diff: 2

Skill:

Level 2 Questions: Reviewing Concepts

Short Answer Questions

B) elevates the rate of energy consumption in resting and active skeletal muscles

C) stimulates muscle metabolism and increases duration and stimulation of the force of a contraction

D) activates myosin light chain kinase

E) red pigment in slow fibers

B) surrounded by sarcoplasmic reticulum and consists of sarcomeres C) surrounded by epimysium and contains muscle fascicles

D) surrounded by perimysium and contains muscle fibers

E) contains thick and thin filaments

Level 1 Questions: Reviewing Facts and Terms

Level 2 Questions: Reviewing Concepts

Essay Questions

1)

Mary wants to enter a weight-lifting competition and consults you as to what type

of muscle fibers she needs to develop and how she should go about it What would you suggest to her?

2)

Describe the basic sequence of events that occurs at the neuromuscular

junction and in the muscle cell

Answer:

The action potential triggers the exocytosis of neurotransmitters stored in vesicles

in the axon ending This acetylcholine binds to receptors in the motor end plate, increasing the muscle membrane permeability to sodium Acetylcholinesterase destroys the acetylcholine, ensuring that each nerve action potential produces only

a single twitch The influx of these positive sodium ions triggers an action

potential The action potential spreads in both directions away from the end plate across the entire surface of the muscle fiber and into the interior via transverse tubules, triggering a pulse of calcium ion release from the sarcoplasmic reticulum, which generates a brief small twitch With additional stimuli, calcium ion builds

up and higher tensions are produced

Diff: 2

Skill:

Level 2 Questions: Reviewing Concepts

3)

Many visceral smooth muscle cells lack motor neuron innervation How are

their contractions coordinated and controlled?

Answer:

Gap junctions interconnect visceral smooth muscle fibers An action potential that begins in one will spread to its surrounding neighbors The action potential can be triggered by stretching, hormones, chemical changes, or stimulation at a myoneural junction on a distant smooth muscle cell

Answer:

This is a case of competition between acetylcholine and the antibody To make the patient’s acetylcholine more effective, a drug that inhibits acetylcholinesterase would slow the breakdown of his acetylcholine, relieving some of the weakness

An acetylcholine blocker would be worse than doing nothing

Diff: 3

determine whether muscle damage has occurred?

Answer:

If muscle damage occurred, the doctor would find enzymes such as creatine

phosphokinase and proteins such as myoglobin or troponin in the bloodstream released by injured skeletal muscle cells The level of these substances

correlates with the severity of the injury

Diff: 3

Skill:

Level 3 Questions: Critical Thinking & Clinical Applications

Diff: 1

Skill:

Level 1 Questions: Reviewing Facts and Terms

Fundamentals of Anatomy & Physiology: 8th Edition Study Aid Test Bank