Respiratory distress syndrome in newborns is caused by
A. lack of surfactant.
B. lack of a respiratory membrane.
C. high oxygen concentration.
D. low oxygen concentration.
Answer: A
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Sensory nerves that detect changes in a variable that is being regulated comprise the ________ of the control mechanism.
Fill in the blank with correct word.
Answer the following statement(s) true (T) or false (F)
1. In the term hepatocyte, both hepato- and -cyte are roots. 2. Misspelling a single letter can result in an anatomical term that refers to a completely different structure.
Which statement about the colon is correct?
a. It has as much absorptive capacity as the small intestine. b. It is the site of the final stages of carbohydrate and protein digestion. c. Its movements are slower than movements in the small intestine. d. Both a and c e. All of the above
If the load on a muscle is increased, eventually a load will be reached at which the velocity of shortening becomes zero. At this point, the muscle contraction is referred to as
a. concentric. b. eccentric. c. isotonic. d. isokinetic. e. isometric.