Magnetic resonance imaging uses
A) a radio antenna. B) high-frequency sound waves.
C) X rays. D) radioisotopes.
A
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Since erythrocytes lack the cellular machinery to make repairs, they only live:
A) 10-20 days. B) 100-120 days. C) 30-60 days D) 145-175 days.
Stimulation of the aortic baroreceptors reflexively results in
A) stimulation of the cardioaccelerator center in the brain. B) increased sympathetic stimulation of the heart. C) increased activity by the parasympathetic nervous system. D) stimulation of the vasoconstrictive center. E) increased heart rate.
A phospholipid differs structurally from a triglyceride in that it has three phosphate
groups attached to the glycerol molecule rather than three fatty acid chains. Indicate whether the statement is true or false
The phospholipid tails are ________, which make the plasma membrane impermeable to water
A) water-loving B) hydrophilic C) polar D) hydrophobic