If carbon dioxide levels rise in the body, negative feedback mechanisms will trigger
A. an increase in breathing so that carbon dioxide levels decline to the set point.
B. a decrease in breathing so that carbon dioxide levels decline below set point.
C. a decrease in breathing so that carbon dioxide levels rise to the set point.
D. an increase in breathing so that carbon dioxide levels rise further above set point.
Answer: A
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Which blood type is called the universal donor?
A) A B) B C) AB D) O
Which type of muscle lines the blood vessels and airways of the body?
A. Rough B. Glia C. Smooth D. Striated
Compare the two main bronchi
A) The right main bronchus is smaller in diameter than the left main bronchus and it descends toward the lung at a shallower angle than the left main bronchus. B) The right main bronchus is smaller in diameter than the left main bronchus and it descends toward the lung at a steeper angle than the left main bronchus. C) The right main bronchus is larger in diameter than the left main bronchus and it descends toward the lung at a shallower angle than the left main bronchus. D) The right main bronchus is larger in diameter than the left main bronchus and it descends toward the lung at a steeper angle than the left main bronchus. E) The right main bronchus is the same diameter as the left main bronchus and it descends toward the lung at a shallower angle than the left main bronchus.
The ________ is composed of an endothelium and a subendothelial layer made up of a thin layer of areolar connective tissue.
A. tunica intima B. tunica externa C. tunica media D. tunica adventitia E. None of the answers is correct.