1. T F The endomysium surrounds each fiber as fascicles.
2. T F Acetylcholine is not required for all types of muscles to contract.
3. T F One action potential brings about the release of about 60 vesicles from the synaptic knob.
4. T F A single power stroke of a motor unit shortens the muscle by only 1%.
5. T F The further a skeletal muscle is stretched the greater its force of contraction.
6. T F Muscles always contract "all or nothing".
7. T F Treppe is an example where the "all or nothing" rule is broken.
8. T F Only 6 ATPs are released from anaerobic glycolysis.
9. T F Tone is proof that skeletal muscle is under voluntary control.
10. T F When muscles undergo hypertrophy the increase in muscle mass and also the number of fibers.
11. The molecule the allows
muscles to contract for seconds to minutes is:
C. ATP plus creatine phosphate
D. none of the above
12. The substance formed
during anaerobic glycolysis is:
C. lactic acid
E. ADP, CO2, and lactic acid are correct
13.The band(s) or zone which
shorten during muscle contraction is (are):
A. I band
B. A band
C. H zone
D. A and C are correct
E. B and C are correct
14. The molecule that binds
to actin is:
A. troponin C
B. troponin I
C. troponin T
E. Z disc
Match the following to fast or slow twitch skeletal muscle.
15.___ high strength
16.___ large sacroplasmic reticulum
17.___ myoglobin present A. fast twitch
18.___ high fatigue rate B. slow twitch
19.___ large blood supply
20.___ aerobic functioning
Match the following to skeletal, smooth, or caridiac muscle.
22.___ intercalated discs
23.___ gap junctions
25.___ involuntary A. skeletal muscle
26.___ Ach inhibits B. smooth muscle
27.___ multiunit C. cardiac muscle
28.___ "Y" shaped D. smooth and cardiac
29.___ 1 T tubule E. skeletal and cardiac
30.___ erector pili
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