Gas exchange between the air in the lungs and the blood takes place in the ________.

A. primary bronchi
B. alveoli
C. trachea
D. respiratory bronchi
E. terminal bronchioles


Answer: B

Anatomy & Physiology

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In the blastocyst, the trophoblast will become __________, whereas the embryoblast will become __________.

A. part of the placenta; the yolk sac B. part of the placenta; the embryo C. the embryo; part of the placenta D. the embryo; the yolk sac E. the yolk sac; the embryo

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Which of the following is not a molecule at the "metabolic crossroads" ?

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Inability to feel or move below the level of the nipple line indicates injury to which spinal nerve root?

A) C7 B) T1 C) T4 D) L1

Anatomy & Physiology