What is the purpose of the cartilaginous rings in the trachea?
A. They support smooth muscle.
B. They lend stability to the neck.
C. They maintain an open passageway for food.
D. They maintain an open passageway for air.
E. They provide a smooth, slick passageway for air.
Answer: D
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Which component of a homeostatic regulation is characterized as having an activity that opposes or enhances the stimulus?
A) balance B) control center C) integration center D) positive feedback loop E) effector
Mr. Jones has a blood pH of 7.00 and a temperature of 100.5?F. His oxygen-hemoglobin dissociation curve would
A. shift to the right, causing more O2 to be released to his cells. B. shift to the left, allowing less O2 to be released to his cells. C. show no change, allowing the O2 concentration to remain stable.
What is an antagonist?
A. A muscle that has the opposite action B. The main muscle of the synergist to perform the action C. A muscle that holds an origin stable for another muscle D. A muscle that has the same action