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 Ter
Trang 1Test 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
Trang 2C) 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
Trang 7have many nuclei
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Trang 13repeating unit of striated myofibrils
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Trang 48diffusion of calcium out of the cell
Trang 81high amounts of oxygen
Trang 84generate much less tension
Trang 86all of the above
Trang 89The thin filaments of smooth muscle fibers are attached to dense bodies
Trang 95none of the above
Trang 98All of these are well known
Trang 101all of the above
Trang 104all of the above
Trang 107All are true
Trang 110Relaxation requires uptake of calcium ion by the sarcoplasmic reticulum
Trang 117the Z lines move closer together
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Trang 120a rich blood supply
Trang 121Level 2 Questions: Reviewing Concepts
Trang 123decreased width of the H band during contraction
Trang 124Level 2 Questions: Reviewing Concepts
Trang 126the 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
Trang 132more permeable to calcium ions
Trang 139an increase in intracellular lactate
Trang 142It would cause an increase in muscle mass
Trang 143It would produce uncontrolled muscle spasms
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Trang 146loss of acetylcholine receptors in the end-plate membrane
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Figure 10-1 Skeletal Muscle Fiber
Use Figure 10-1 to answer the following questions:
102)
What is released from the structure labeled “9”?
Trang 163Level 2 Questions: Reviewing Concepts
Figure 10-2 Muscle Contractions
Use Figure 10-2 to answer the following questions:
Trang 165gradually warms up
Trang 166The muscle is starting to fatigue
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Trang 171It is producing more ATP as tension increases
Answer:
B
Diff: 2
Skill:
Level 2 Questions: Reviewing Concepts
Short Answer Questions
Trang 175B) 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
Trang 176B) 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
Trang 177Level 1 Questions: Reviewing Facts and Terms
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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?
Trang 1812)
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?
Trang 182Answer:
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
Trang 183determine 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
Trang 184Diff: 1
Skill:
Level 1 Questions: Reviewing Facts and Terms
Fundamentals of Anatomy & Physiology: 8th Edition Study Aid Test Bank