The actions of insulin and glucagon are
a. synergistic.
b. antagonistic.
c. cooperative.
d. permissive.
e. mutualistic
B
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Which blood vessel is next to living cells in nearly all body tissues?
a. venules b. arterioles c. capillaries d. veins e. arteries
The swim bladders of fishes function primarily in ventilation. Indicate whether the statement is true or false
Animals active primarily at night often have _______________layers in their eyes.
Fill in the blank(s) with the appropriate word(s).
The function of phosphatases in signal transduction is best described as to
A) move the phosphate group of the transduction pathway to the next molecule of a series. B) prevent a protein kinase from being reused when there is another extracellular signal. C) amplify the transduction signal so it affects multiple transducers. D) amplify the second messengers such as cAMP. E) inactivate protein kinases and turn off the signal transduction.