The Muscle Fiber Contracts by a Sequence of Events Initiated

question 35

Multiple Choice

The muscle fiber contracts by a sequence of events initiated by the acetylcholine.Which of the following is the correct sequence?
I-The calcium-troponin complex pulls away tropomyosin from the myosin binding sites of actin.
II-The freed-sites of actin now can bind to myosin to form cross bridges.
III-Calcium ion binds to the troponin.

• A)I,III,and II
• B)III,II,and I
• C)II,III,and I
• D)I,II,and III
• E)III,I,and II

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Definitions:

Decreased

The act or process of becoming smaller in size, quantity, or intensity; the opposite of increased.

Fluctuated

Varied or changed over time within a range or scale, often in an unpredictable manner.

Liberal Democracy

A form of government where free and fair elections occur and there is protection of individual rights and freedoms.

Formal Democracy

Involves regular, competitive elections.