HUMAN BIOLOGY:CONC.+CURRENT..(LOOSE)
HUMAN BIOLOGY:CONC.+CURRENT..(LOOSE)
7th Edition
ISBN: 9780321862525
Author: Johnson
Publisher: PEARSON
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Chapter 6, Problem 11TY

Which of the following is the site of calcium ion storage within muscles?

a. T tubules

b. sarcoplasmic reticulum

c. actin filaments

d. myosin filaments

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Which of the following is the site of calcium ion storage within muscles? a. T tubules b. sarcoplasmic reticulum c. actin filaments d. myosin filaments
The sliding filament mechanism describes the process during which: a. actin and myosin slide relative to each other b. sarcomeres slide relative to each other c. troponin and tropomyosin slide relative to each other d. muscle fibers slide past each other
What role (function) does calcium have within a muscle fiber? a. trigger muscle potentials along t-tubules b. trigger contraction by causing the formation of cross bridges c. trigger exocytosis of ACh across the synaptic space d. trigger action potentials along axons e. open voltage gates within the sarcoplasmic reticulum 2. Which of the following are regulatory proteins that allow a muscle fiber to contract when calcium is present? (select all that apply) dystrophin troponin myosin tropomyosin actin 3. During this phase of an action potential, potassium ions exit the cell through voltage gated potassium channels. a. depolarization b. repolarization c. glycolysis d. cross bridge formation
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