Fetal testes secrete testosterone, and fetal ovaries secrete estrogen
Indicate whether the statement is true or false
F
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Which chemical induces prolonged contraction of smooth muscle during allergic reactions?
a. basophil chemotactic factor b. eosinophil chemotactic factor c. histamine d. SRS-A e. TP-2
When a neuromodulator slows the reuptake of a neurotransmitter or causes expression of an increased number of receptors on postsynaptic neurons, the effect is called
A. presynaptic potentiation. B. recruitment. C. spatial summation. D. facilitation. E. temporal summation.
In the first step of the citric acid cycle, ______ acid combines with acetyl-CoA to produce citric acid
A. oxaloacetic B. pyruvic C. lactic D. alpha ketoglutaric E. ketoglutaric
Gametes have half as many chromosomes as other cells in the body and are thus referred to as ________.
Fill in the blank(s) with the appropriate word(s).