In the lungs, surfactant is secreted by ____ cells
a. beta
b. parietal
c. alveolar
d. alpha
Ans: c. alveolar
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Which of these is a first-class lever?
A. The humeroulnar joint B. The talocrural joint C. The knee joint D. Any metacarpophalangeal joint E. The atlanto-occipital joint
The maintenance of a relatively constant internal environment in an organism is termed
A) positive feedback. B) homeostasis. C) negative feedback. D) effector control. E) integration.
Which of the following polysaccharides performs a structural role?
A) Amylose B) Glycogen C) Chitin D) Amylopectin
A person working outside in the hot sun can perspire a great deal. This increase in perspiration results in an increase in water loss from the body. Increased water loss causes the blood osmolality to increase. This increased osmolality is "sensed" by the ________.
A. kidneys B. cerebral cortex C. osmoreceptors D. anterior pituitary E. baroreceptors