The hormone that causes the alveoli of the mammary glands to secrete milk is:
estrogen.
oxytocin.
prolactin.
estrogen.
The Correct Answer is C
A. estrogen: This hormone promotes the development of the duct system in the breasts but does not trigger milk secretion.
B. oxytocin: This hormone causes the ejection (let-down) of milk by contracting cells around the alveoli; it does not stimulate the actual production/secretion of milk into the alveoli.
C. prolactin: Produced by the anterior pituitary, prolactin is the primary hormone responsible for stimulating the mammary glands to synthesize and secrete milk.
D. estrogen: This hormone promotes the development of the duct system in the breasts but does not trigger milk secretion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. The cell membrane is permeable to Na+ but impermeable to K+ ions: This is the opposite of reality; the resting membrane is much more permeable to K+.
B. The outer surface of the plasma membrane has a negative charge: At rest, the outside of the membrane is positively charged relative to the inside.
C. The highest concentration of K is extracellular: K+ is primarily an intracellular ion, while Na+ is primarily extracellular.
D. The sodium pump has moved Na to the outside of the plasma membrane: The Na+/K+ pump actively maintains the resting potential by pumping sodium out of the cell.
Correct Answer is B
Explanation
A. hemostasis: This is the general term for the process of stopping bleeding, which includes clot formation, not dissolution.
B. fibrinolysis: Fibrinolysis is the enzymatic breakdown of the fibrin mesh in blood clots, primarily performed by the enzyme plasmin.
C. erythroblastosis: This refers to the abnormal presence of erythroblasts (immature red blood cells) in the blood, usually related to hemolytic disease.
D. diapedesis: This is the process of white blood cells "squeezing" through capillary walls to enter tissues.
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