The effect of acetylcholine on heart muscle cells is to

a. stimulate one contraction.
b. increase the rate of beating.
c. decrease the rate of beating.
d. relax the heart.


Ans: a. stimulate one contraction.

Biology & Microbiology

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Which one of the following is not important to the concept of homology? 

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Four of the five answers are important evolutionary adaptations in primates. Select the exception

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Indicate whether the statement is true or false

Biology & Microbiology