Oxygen and carbon dioxide are exchanged across the respiratory membrane by the process of
A. active transport.
B. diffusion.
C. filtration.
D. osmosis.
E. cotransport.
B
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Which of the following is the most important stimulus for contraction of the gallbladder?
a. CCK causes contraction of the gallbladder. b. mechanical contraction of the small intestine causes bile to be forced out of the gallbladder. c. sympathetic stimulation causes contraction of the gallbladder. d. an increase in bile secretion by the liver causes contraction of the gallbladder. e. bile salts cause contraction of the gallbladder.
________ stimulates milk secretion and maintains milk production by mammary glands.
A. Growth hormone B. Prolactin C. Luteinizing hormone D. Oxytocin E. Follicular-stimulating hormone
The primary somatic sensory cortex is located in the
A. frontal lobe. B. temporal lobe. C. occipital lobe. D. parietal lobe.
Plasma is a yellowish fluid
Indicate whether the statement is true or false.