As blood travels through the venous system toward the heart, why do the veins become larger in diameter?
A) The transition causes the resistance to increase further so that the flow rate of blood increases.
B) The transition causes the resistance to decrease further so that the flow rate of blood increases.
C) The transition causes the resistance to decrease further so that the flow rate of blood decreases.
D) The transition causes the resistance to increase further so that the flow rate of blood decreases.
E) The transition reflects no change in the resistance, but causes the flow rate of blood to increase.
B) The transition causes the resistance to decrease further so that the flow rate of blood increases.
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The neuroglial cells that participate in maintaining the blood-brain barrier are the
A) astrocytes. B) ependymal cells. C) microglia. D) oligodendrocytes. E) Schwann cells.
Muscles possess low levels of __________ that can be oxidized immediately
A) Glucose B) Fatty acids and glycerol C) Free amino acids D) All of the above Fill in the blank with the correct answer.
A renal corpuscle is a _____, whereas a renal tubule is a _____
A) cluster of blood capillaries and glomerular capsule; highly coiled tubule exiting the glomerular capsule B) special blood cell in the kidneys; tubule that leads from the kidneys to the bladder C) glandular structure that regulates blood pressure; blood vessel that regulates the flow of blood into the glomerulus D) storage area for urine; tubule that carries urine from the urinary bladder outside
Water channels in cells in the collecting duct are called ________.
Fill in the blank(s) with the appropriate word(s).