Growth of the functional layer and prevention of menstruation during pregnancy are brought about by secretion of
A. human placental lactogen.
B. human chorionic thyrotropin.
C. progesterone.
D. cortisol.
E. relaxin.
Answer: C
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Inertia is directly proportional to which quantity(s)?
A. mass B. force C. acceleration D. all of the above
What is the function of bicarbonate when it is secreted by the large intestine?
A. It increases the pH of the feces, which are acidic because of bacterial secretions. B. It decreases the pH of feces, which are alkaline because of bacterial secretions. C. It aids in the digestion of cellulose. D. It aids in the digestion of proteins.
What type of bond is formed between potassium and iodine?
A. Ionic bond B. Hydrogen bond C. Polar covalent bond D. Nonpolar covalent bond
Proteoglycan molecules in the matrix of cartilage
A. give cartilage its resilient nature. B. replace collagen fibers in the matrix. C. make the perichondrium very stretchable. D. fill the lacunae. E. make cartilage hard and compact.