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Hank Hank
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6 years ago
________ are the units of muscle contraction.
 
  a. Actin
 b. Myofibrils
 c. Myosin
 d. None of these choices.
 e. Sarcomeres

Question 2

Which of the following substances that are carried in blood can not diffuse across endothelial cells of a capillary?
 
  a. carbon dioxide
 b. proteins
 c. small lipid-soluble molecules
 d. oxygen
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Replies
wrote...
6 years ago
Answer to q. 1

e

Answer to q. 2

b
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