The inner cell mass of the blastocyst will
A) form the placenta.
B) form the morula.
C) form the embryo.
D) form blood vessels of the placenta.
E) provide nutrients for early growth.
C
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The placenta, a vitally important metabolic organ, is made up of a contribution from mother and fetus. Which portion is from the fetus?
A) yolk sac B) umbilicus C) chorion D) amnion
This structure prevents food from entering the airway.
a. Vestibular fold B. Uvula C. Laryngopharynx D. Epiglottis
A home heating system is an example of a ________ feedback system; the thermostat acts as the
A. positive; set point. B. negative; effector. C. negative; control center. D. positive; sensor.
Treppe
A. can contribute to improved muscle efficiency. B. may be due to an increase in the level of Ca2+ around the myofibril. C. is achieved during warm-up exercises. D. is an example of a graded response. E. All of these choices are correct.