Which hormone controls the milk-let-down reflex?
A) prolactin B) gonadotropins
C) antidiuretic hormone (ADH, or vasopressin) D) oxytocin
Answer: D
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Vasopressin quickly increases the reabsorption of water by the collecting duct. This happens because
A) The cell transcribes and translates more aquaporins to be inserted in the membrane. B) Preformed aquaporins are translocated to the membrane. C) Phosphorylation of existing aquaporins increase their permeability. D) All of the above are possible.
Cells eliminate carbon dioxide as a waste product
Indicate whether the statement is true or false
Which of the following is not important when fighting bacterial infections?
A. Proliferation of red blood cells B. Production of antibodies by B cells C. Recognition of antigens by lymphocytes D. Proliferation of neutrophils E. Production of hydrogen peroxide
What does "D" represent on the diagram?
A. Depolarization phase of action potential B. Threshold C. Repolarization phase of action potential D. Depolarization