Short-chain triglycerides found in foods such as butterfat molecules in milk are split by a specific enzyme in preparation for absorption. Which of the following enzymes is responsible?
A) pepsin
B) amylase
C) lipase
D) chymotrypsin
C
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________________________________________ respiration is the absorption of atmospheric oxygen by the blood in the lungs and the diffusion of carbon dioxide from the blood in the lungs to atmospheric air
Fill in the blank(s) with correct word
Which of these cannot cause a mutation?
A. A mistake made by the DNA polymerase B. A mistake made by the RNA polymerase C. Radiation D. A chemical E. A virus
The muscles of the back contract to straighten so that you sit at a more erect posture and subsequently the muscles are suddenly stretched as you nod off. Which of the following best represents the sequence of events when you start to nod off?
(1) muscles of the back are stretched (2) the muscle spindle is stretched (3) action potentials in sensory neurons of the muscle spindles increase (4) action potentials in alpha motor neurons of skeletal muscle fibers increase (5) skeletal muscle of the back contract A. 1, 2, 3, 4, 5 B. 1, 5, 2, 3, 4 C. 1, 5, 3, 2, 4 D. 5, 2, 3, 4, 1 E. 4, 5, 3, 2, 1
Autonomic reflexes
A. are impossible. B. are integrated somewhere in the CNS. C. have efferent input and afferent output. D. are an example of positive feedback. E. are harmful.