When a nerve fiber is polarized, the concentration(s) of
A) Na+ and K+ are higher on the inside of the membrane.
B) Na+ is higher on the outside of the membrane and K+ is higher on the inside.
C) Na+ is higher on the inside of the membrane and K+ is higher on the outside.
D) Na+ and K+ are higher on the outside of the membrane.
B
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a. cytoplasm; nucleoplasm b. cytoplasm; mitochondria c. interstitial fluid; blood d. interstitial fluid; cytoplasm
Aldosterone ________
A) is secreted by the posterior pituitary B) presence increases potassium concentration in the blood C) production is greatly influenced by ACTH D) functions to increase sodium reabsorption
Autoimmune disorders are hypersensitivities in which the body fails to recognize its own _______
Fill in the blank(s) with the appropriate word(s).
Paranasal sinuses seem to have no useful function
a. true b. false