How many semicircular canals are in each organ of balance?
a. 2
b. 3
c. 4
d. 5
e. more than 6
B
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The chemical reaction illustrated in the figure is:
a. the first step in the citric acid cycle.
b. the energy investing phase of glycolysis.
c. fermentation.
d. part of the electron transport chain.
e. the energy capture phase of glycolysis.
The fetal period is characterized by ________
A) the formation of organ systems B) neurulation C) germ layer formation D) growth and preparation of fetal organ systems for their eventual functions
Hydrophobic molecules would enter a cell
a. through integral transport proteins. b. by passive transport directly across the membrane. c. by active transport directly across the membrane.
An example of natural passive immunity would be
A. a fetus acquiring maternal IgG to the chickenpox virus across the placenta. B. chickenpox vaccine triggers extended immunity to chickenpox. C. chickenpox infection is followed by lifelong immunity. D. giving a person immune serum globulins to chickenpox virus after exposure to the disease.