A blastomere is a ________ and a blastocyst is ________.
A. cell produced by cleavage; a hollow ball of cells
B. fetal membrane; an embryonic membrane
C. hollow ball of cells; a cell resulting from cleavage
D. fetal organ produced by cleavage; an embryonic organ produced by cleavage
Answer: A
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Which of the following possibilities is incorrect? During the mammalian cardiac cycle, the right ventricle contracts less forcefully than the left because
A) The distance the blood must travel is shorter. B) Of the low total resistance of the pulmonary circuit. C) The blood vessels of the lungs are delicate. D) The capillary bed offers high resistance.
Which condition exists at high altitudes?
a. histotoxic hypoxia b. hypoxic hypoxia c. anemic hypoxia d. hypocapnia e. None of the above
The probable reason why certain genetic diseases are more common among specific ethnic groups is that the group members share a similar _________________________.?
Fill in the blank(s) with correct word
Nervous stimulation of skeletal muscle results in a wave of depolarization along the plasma membrane. This electrical signal is carried into the interior of the muscle cell via the membranes of the:
a. Intercalated disks b. Nuclear envelope c. Sarcomere d. Sarcoplasmic reticulum e. T-tubules