McGraw-Hill Online Learning Center Test<BLURT>

McGraw-Hill Online Learning Center Test


1. Review the animation and answer the following questions.

The site of gas exchange is the

A. nasal cavity.
B. bronchiole.
C. diaphragm.
D. alveolus.


2. Gas exchange readily occurs between the alveoli and the adjacent capillaries because A. there are specific pores to allow these gases to cross.
B. energy is used to pump the gases.
C. of the thin walls of the alveolus and the capillaries.
D. the membranes are impermeable to carbon dioxide and oxygen.


3. Which of the following is true? A. Blood entering the lungs contains no oxygen.
B. Blood exiting the lungs contains no carbon dioxide.
C. Blood exiting the lungs is rich in carbon dioxide.
D. Blood entering the lungs contains very little oxygen.
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