If the mother is exposed to teratogens during pregnancy, what can happen to the fetus?
A) These substances can cross the placental barrier to cause damage to the fetus.
B) These substances dramatically reduce the blood supply that flows through the placenta
and thus injure the fetus.
C) These substances interfere with the development of the extraembryonic membranes that
support the fetus.
D) These substances are immediately toxic to a fetus.
E) None of the answers are correct.
A) These substances can cross the placental barrier to cause damage to the fetus.
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Factors that influence an individual's BMR (basal metabolic rate) include all of the following except
A) physical exertion. B) age. C) body weight. D) genetics. E) gender.
The "remodeling" of the fish gill to permit a fish to switch from freshwater to sea water is called __________
Fill in the blank with the correct word.
Jason was attempting a jump shot and fell to the ground in pain, grasping at the calf of his leg. There is an enormous bulge in his leg just below the popliteal fossa, and he can't plantar flex that foot. Most likely he has injured his ________.
A. quadriceps tendon B. patellar ligament C. hamstrings muscles D. tibia E. calcaneal tendon
Deoxygenated blood enters the heart from the body through what structure?
A. Superior and inferior vena cavae B. Pulmonary vein C. Aorta D. Coronary artery