____________________ controls are primarily responsible for matching tissue blood flow with the metabolic needs of the tissue involved
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Which of the following enzymes has the function of synthesizing dna during dna replication?
a. transferase b. restriction enzymes c. reverse transcriptase d. DNA polymerase e. DNA ligase
Cell adhesion molecules that protrude from the inner endothelial lining and causes leukocytes to marginate are called ________
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Both insulin and glucagon are peptide hormones that target liver cells. The responses of the target cells to these two hormones are exactly the opposite of each other. This information implies that
A) each of the two hormones uses a different second messenger. B) one of the hormones does not interact with a membrane receptor. C) both hormones interact with receptors at the cell nucleus. D) one hormone binds to a receptor on the cell membrane and the other to an intracellular receptor.
During normal metabolism of the human body, about 60% of the energy released from organic molecules
A. is used to perform external work. B. appears immediately as heat. C. is stored as triglycerides. D. is used to perform internal work. E. is stored as ATP.