Which of the following is not involved in the relaxation of muscle?
a. when acetylcholine is destroyed by acetylcholinesterase.
b. when there is no longer a local action potential.
c. when the T tubules actively take up the Ca2+ that had been released.
d. when the actin and myosin molecules are no longer bound together.
e. when the troponin-tropomyosin complex slips back into its blocking position.
C
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The anatomical term that indicates a structure close to the surface is
A) superior. B) anterior. C) proximal. D) superficial.
Describe how the bicarbonate buffer system functions to maintain pH
What will be an ideal response?
What is the girdle of glycoproteins just below the tight junction between epithelial cells?
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