Which of the Following Contributes to Gas Exchange in the Human

question 64

Multiple Choice

Which of the following contributes to gas exchange in the human fetus?

• A)the lower blood pH of the embryo
• B)the lack of turbulence in fetal blood
• C)the high oxygen levels maintained in the amniotic fluid by the placenta
• D)the stronger attraction that fetal hemoglobin has for oxygen when compared to adult hemoglobin

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Definitions:

Spontaneous Recovery

The reappearance of a previously extinguished response after a period of no exposure to the conditioned stimulus.

Stimulus Discrimination

The learned ability to differentiate between similar stimuli, responding only to the original conditioned stimulus and not to similar ones.

Stimulus Generalization

A psychological phenomenon in which a response to a specific stimulus becomes associated with other stimuli that are similar.

Conditioned Response

A learned reaction to a previously neutral stimulus that has become associated with an unconditioned stimulus.