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10th -
12thgrade
6.3 B: Contraction of a Skeletal Muscle as a Whole
13 questions
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- 1. Multiple Choice
Anaerobic glycolysis requires ________ to make ATP.
creatine phosphate only
oxygen only
glucose only
both oxygen and glucose
- 2. Multiple Choice
A smooth, sustained contraction, with no evidence of relaxation, is called ________.
fused, or complete, tetanus
a twitch
unfused, or incomplete, tetanus
summing of contractions
- 3. Multiple Choice
Contractions in which muscles shorten and produce movement are known as ________.
isotonic contractions
twitches
isometric contractions
resistance exercises
- 4. Multiple Choice
Skeletal muscle, as a whole, can generate different amounts of force, and different degrees of shortening, in response to stimuli. What is this concept called?
graded response
twitch
fused, or complete, tetanus
incomplete, or unfused, tetanus
action potential
- 5. Multiple Choice
A skeletal muscle twitch differs from a tetanic contraction in that ________.
the tetanic contraction is considered abnormal, while the twitch is a normal muscle response
the tetanic contraction is caused by a single stimulus, while the twitch is caused by very rapid multiple stimuli
the muscle twitch is prolonged and continuous while a tetanic contraction is brief and "jerky"
the muscle twitch occurs only in small muscles while a tetanic contraction occurs in large muscle groups
the muscle twitch is a brief and "jerky" movement, while the tetanic contraction is prolonged and continuous
- 6. Multiple Choice
Creatine phosphate (CP) functions within the muscle cells by ________.
forming a temporary chemical compound with myosin
forming a chemical compound with actin
inducing a conformational change in the myofilaments
storing energy that will be transferred to ADP to resynthesize ATP as needed
storing energy that will be transferred to ATP to resynthesize ADP as needed
- 7. Multiple Choice
The condition of skeletal muscle fatigue can be best explained by ________.
the all-or-none law
the inability to generate sufficient quantities of ATP due to feedback regulation of synthesis
the inability of the muscle to contract even if it is being stimulated
a total lack of ATP in the body
inadequate numbers of mitochondria in muscle cells
- 8. Multiple Choice
Which of the following is an example of an isometric contraction?
shaking the head as to say "no"
pushing against an immovable wall
bending the elbow
rotating the arm
nodding the head as to say "yes"
- 9. Multiple Choice
Which method of regenerating ATP during muscle contraction can produce lactic acid?
aerobic cellular respiration
oxidative phosphorylation
direct phosphorylation
creatine phosphate
anaerobic glycolysis
- 10. Multiple Choice
Which of the following is a type isometric exercise in which muscles increase in size and strength?
swimming
biking
jogging
lifting weights
dancing
- 11. Multiple Choice
The fastest mechanism for producing ATP is aerobic respiration.
TRUE
FALSE
- 12. Multiple Choice
Isometric contractions produce movement when filaments slide past one another and the muscle shortens.
TRUE
FALSE
- 13. Multiple Choice
Aerobic, or endurance, exercise involves jogging or biking.
TRUE
FALSE
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