________ is secreted by beta cells of pancreas, its secretion is stimulated by ________ in blood glucose level.
A. Glucagon, a decrease
B. Insulin; an increase
C. Glucagon, an increase
D. Insulin; a decrease
Answer: B
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Lymphatic capillaries are known for all of the following except
A) being the starting point of the lymphatic circulation. B) being the smallest lymphatic vessels. C) having larger diameters and looser walls than blood capillaries. D) having shingle-like endothelial cells. E) allowing nutrient and gas exchange.
Passive electroreception uses an electric organ located in the tail of certain fish
Indicate whether the statement is true or false
Where is the diaphragm in relation to the lungs?
A. Superior B. Inferior C. Superficial D. Deep
Consider the biochemical pathway used to synthesize the amino acid proline. A high increase in the level of proline will most likely lead to
A) increased breakdown of proline. B) a further increase in proline production. C) proline being converted to praline. D) a decrease in proline production. E) no change in the rate of proline production.