Surfactant helps to prevent the alveoli from collapsing by ________.
A) humidifying the air before it enters
B) warming the air before it enters
C) interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid
D) protecting the surface of alveoli from dehydration and other environmental variations
C) interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid
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Basophils attack parasitic worms and play a role in allergic reactions
a. True b. False Indicate whether the statement is true or false
Approximately ________ liters of glomerular filtrate enter glomerular capsules each day
A) 480 B) 180 C) 125 D) 18 E) 1.8
The hormone that has the opposite function of calcitonin is:
a. parathyroid hormone b. T3 c. T4 d. insulin
During the micturition reflex,
A) stimulation of stretch receptors in the bladder wall sends impulses to the lumbar spinal cord. B) sympathetic motor neurons that control the detrusor muscle become active. C) the internal sphincter is consciously relaxed. D) the external sphincter is unconsciously relaxed. E) None of the answers is correct.