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
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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.
All cross bridges within a sarcomere stroke in unison when pulling the actin filaments
Indicate whether the statement is true or false
Alternative routes of blood supply are called ________.
A. anastomoses B. capillary beds C. thoroughfare channels D. metarterioles E. preferred channels
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.