What happens when troponin and tropomyosin block the active sites of actin?

A) The muscle produces a weak contraction. B) The muscle contraction reaches peak tension.
C) The muscle contraction increases tension. D) The muscle relaxes.


Answer: D

Anatomy & Physiology

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A triglyceride consists of

A. 3 fatty acids and 1 glycerol. B. 3 glucose molecules. C. 3 fatty acids and 3 phosphate groups. D. 3 glycerols and 1 fatty acid.

Anatomy & Physiology

All cross bridges within a sarcomere stroke in unison when pulling the actin filaments

Indicate whether the statement is true or false

Anatomy & Physiology

Alternative routes of blood supply are called ________.

A. anastomoses B. capillary beds C. thoroughfare channels D. metarterioles E. preferred channels

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Why are some salts excreted?

A. They maintain proper salt concentration in the blood. B. They are not excreted. C. They are end products of metabolism.

Anatomy & Physiology