The placental membrane is composed of
A. the embryonic disc.
B. the amnion and chorion.
C. a single layer of epithelial cells.
D. a double layer of epithelial cells.
Answer: D
You might also like to view...
Sympathetic activation leads to
A) relaxation in skeletal muscle of bronchioles, causing bronchodilation. B) contraction of smooth muscles of bronchioles, causing bronchoconstriction. C) relaxation in smooth muscles of bronchioles, causing bronchodilation. D) relaxation of smooth muscles of bronchioles, resulting in bronchoconstriction. E) contraction of smooth muscles of bronchioles, causing bronchodilation.
What is a coenzyme?
A. A metal, such as zinc, that participates in enzymatic reactions B. Any ligand that binds to a specific site on a protein receptor C. An inorganic molecule that catalyzes enzymatic reactions D. A term regarding enzymatic reactions that is synonymous with "cofactor" E. An organic cofactor that directly participates as one of the substrates in an enzymatic reaction
A normal, relaxed inhalation carries about ________ of the inhaled air to the olfactory organs
A) 50 percent B) 8 percent C) 2 percent D) 35 percent E) 10 percent
Adrenoleukodystrophy is caused by deficiency of a protein in the outer membrane of
A) cells. B) peroxisomes. C) lysosomes. D) mitochondria.