What is "allosteric modulation"?
A. regulation of physiological functions by the sympathetic division of the autonomic nervous system
B. modification of the functional state of a protein by temperature or pH
C. the change in the shape and functional state of a protein that occurs when a ligand binds to a regulatory site
D. the fact that all binding sites on a protein must be occupied to have a biological effect
E. the ability of a single ligand-binding site to bind to molecularly similar ligands
C
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When shoveling snow from the driveway, the older man did not feel the bitter cold. Which action made his blood vessels get smaller in diameter, conserving heat in the warm core of his body?
A. Vasomotor B. Vasodilation C. Vasoconstriction D. Vasopressor
LH stimulates the thecal cells to synthesize progesterone during the follicular phase
Indicate whether the statement is true or false
Changes in blood pressure are detected by ________ in certain arteries.
A. mechanoreceptors B. chemoreceptors C. nociceptors D. proprioceptors E. thermoreceptors
Down syndrome is due to an extra
A. X chromosome. B. autosome. C. Y chromosome. D. X chromosome or an extra Y chromosome.