In response to gonadotropin releasing hormone (GnRH), the anterior pituitary secretes:
a. estrogen or testosterone
b. sex stimulating hormone
c. progesterone
d. leutinizing hormone and follicle-stimulating hormone
e. prolactin
d
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_______, although structurally different from gap junctions in animal cell tissues, may be thought of as the functional equivalent of gap junctions in plants.
a. Adherens junctions b. Desmosomes c. Hemidesmosomes d. Plasmodesmata
A newly synthesized polypeptide that will ultimately form a cytoplasmic protein will most likely fold into a tertiary structure with its ________ amino acid R-groups facing outward.
A. hydrophilic B. hydrophobic
Cells can use (active/allosteric/substrate) sites to regulate enzyme activity and thereby control their metabolism
What will be an ideal response?
Which situation involves a risk to a fetus due to the mother smoking during pregnancy?
A. decreased digestive activity in the stomach of the fetus B. a decrease in the amount of oxygen in the ovary of the mother C. inhalation of secondhand smoke by the fetus D. toxins in the bloodstream of the mother