Which of the following is NOT representative of endocrine glands?
A) They produce hormones.
B) They drain into blood vessels.
C) They have ducts.
D) They drain into lymph vessels.
C) They have ducts.
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Which of the following statements about nuclear localization of proteins is not true?
A. Importin ? and importin ? form a cytosolic complex that interacts with proteins containinga nuclear localization signal. B. Ran-GTP binding is required for the recycling of both importin ? and importin ? back to the cytosol. C. Ran-GDP is transported from the nucleus to the cytosol.
Which of the following statements about the bicarbonate-carbonic acid buffer system is false? a. Rapid, deep breathing makes the pH of the blood rise
b. Bicarbonate can bind to excess hydrogen ions, preventing blood pH from becoming too acidic. c. None of the choices. d. Carbon dioxide can dissolve in the blood as carbonic acid.
When cells metabolize protein, ammonia is formed. An example of an animal that directly excretes ammonia without further modification is a
a. fish. b. bird. c. snake. d. turtle. e. human.
During allergic reactions, what class of antibody causes mast cells and basophils to release histamine?
A) IgM B) IgE C) IgG D) IgD E) IgA