Cellular responses to hormones that initiate second-messenger systems include ________.
A) possible activation of several different second-messenger systems
B) cyclic AMP phosphodiesterase formation of an active second messenger
C) formation of a specific protein kinase that acts on a series of extracellular intermediates
D) hormone binding to intracellular receptors
A) possible activation of several different second-messenger systems
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Subcutaneous fat (the fatty layer just beneath the skin) is also known as
A. fibrous tissue. B. the lamina propria. C. adipose tissue. D. mesenchyme. E. reticular tissue.
Food is pushed along the esophagus by rhythmic, muscular contractions called _________
Fill in the blank(s) with the appropriate word(s).
Immunoglobulins that are primarily found in glandular secretions are ________.
A) IgD. B) IgM. C) IgG. D) IgA. E) IgE.
Overinflation of the lungs during inhalation is prevented by the _____.?
A) ?stimulation of nerve endings in the walls of the lungs B) ?action of the diaphragm C) ?positive pressure in the pleural cavity D) ?level of oxygen in the alveoli