A child is born with a hole in his heart between the left and right ventricles. This condition must be immediately corrected with surgery because the hole ________
A) will cause the flow of blood to reverse in the heart
B) will allow blood to leak out of the heart and the child could bleed to death
C) will cause blood to flow in the reverse direction back into veins instead of the arteries
D) allows mixing of both oxygenated and deoxygenated blood, which reduces oxygen delivery to tissues
D
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The transmission of information from one neuron to another has been found to occur by all of the
following mechanisms EXCEPT
a. neurotransmitters released from vesicles. b. components of a membrane can act as neurotransmitters. c. electrical connections. d. chemical signals transmitted through electrical connections. e. a gas that diffuses through a cell membrane.
During the citric acid cycle, each acetyl group entering the cycle yields:a
1 ATP, 2 NADH, and 3 FADH2.
b. 1 ATP, 3 NADH, and 1 FADH2. c. 3 ATP, 2 NADH, and 1 FADH2. d. 4 ATP, 2 NADH, and 1 FADH2. e. 1 ATP, 2 NADH, and 4 FADH2.
reproductive isolation
What will be an ideal response?
The molecule that an enzyme acts upon is known as its
A) substrate. B) coenzyme. C) apoenzyme. D) product. E) catalyst.