Which is TRUE about hormonal control during pregnancy?
A. The corpus luteum must remain functional for 38 weeks, because it is the main source of estrogen and progesterone.
B. The placenta responds to estrogen and progesterone from the corpus luteum, but does not secrete them.
C. The placenta produces estrogen without any contribution from the fetal adrenal cortex.
D. The placenta is provided with androgens by the maternal ovaries and adrenal glands, and by the fetal adrenal glands.
E. The placenta secretes only steroid hormones, while fetal and maternal pituitary glands secrete pregnancy-specific protein hormones.
D
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The flap-like structure that prevents food from entering the larynx is called the
A) uvula. B) soft palate. C) epiglottis. D) thyroid cartilage. E) cricoid cartilage.
The visceral pericardium is also called the
A) parietal pericardium. B) pericardial cavity. C) pericardial sac. D) fibrous pericardium. E) epicardium.
When fluid intake equals fluid output, and there is a normal distribution of solvent and solutes in the body's fluid compartments, fluid ________ exists.
Fill in the blank(s) with the appropriate word(s).
Detail the life cycle of an erythrocyte, including: (1) specific cells from which they are derived, (2) site of development, (3) name and source of chemicals that stimulate their production, and (4) length of life span and why this life span is limited
What will be an ideal response?