Why does the pressure in the arteries and arterioles fall as the blood moves away from the heart?
A. Heat is lost to the environment.
B. Friction causes a loss of energy.
C. There is less blood in each vessel.
D. The arterial vessels get smaller as they get farther from the heart.
Answer: B. Friction causes a loss of energy.
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A) diffusion. B) osmosis. C) endocytosis. D) protein channels. E) antigen channels.
A couple is trying to calculate the chance of genetic traits in their potential offspring. From family history, the man presumes he is heterozygous for the height gene via the "tall" allele (T). His partner is short in stature, so she believes she is homozygous for the height gene via the "short" allele (t). Assuming the "tall" allele is completely dominant, what is the chance that their offspring would be tall in stature?
A. 50% B. 75% C. 25% D. 100%
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A) higher concentration of molecules B) small concentration gradient C) small molecule size D) high temperature
Which of the following is NOT part of the upper respiratory tract?
A. Trachea B. Larynx C. Pharynx D. Nose