Insulin has no effect on the carrier-mediated transport of glucose in the liver; therefore, insulin does not stimulate the uptake of glucose by that organ
Indicate whether the statement is true or false.
FALSE
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In newborn infants, the medullary cavity and all areas of spongy bone contain yellow bone marrow
Indicate whether the statement is true or false
Carrie is being examined by her dentist, who notices that she has many cavities (caries). When she tells him about her dental regimen, he explains to her that she doesn't brush her teeth often enough to remove the bacteria that ________, which is why she has so many cavities.
A. directly secrete acids that dissolve enamel B. destroy the gums so that the teeth loosen C. infect the gums, causing dental caries D. metabolize carbohydrates in food, producing acidic by-products that damage enamel and dentin
What is the fate of ACh following binding to receptors?
a. it remains bound causing continued excitement. b. it is removed by the enzyme acetylcholinesterase. c. it is actively reabsorbed the axon terminal. d. it is passively reabsorbed by the muscle cell. e. none of these answers.
If the cusps of an atrioventricular valve are damaged or functionally impaired so that they do not close completely during the normal point in the cardiac cycle, blood may flow backwards. This is called ________.
A) ischemia B) regurgitation C) thrombosis D) automaticity E) nodal depolarization