All of the following are true statements about sound waves except:
a. they are produced by a disturbance pattern in air molecules.
b. they gradually dissipate as they travel from the original sound source.
c. the human ear can detect sound waves between 20 and 20,000 cycles per second.
d. the average human ear is most sensitive to sound waves with frequencies between 5,000 and 10,000 cycles per second.
e. they consist of alternating regions of air compression and rarefaction.
D
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The type of neuronal circuit that ensures that we continue to breathe while asleep is a ________ circuit.
A. converging B. parallel-after-discharge C. diverging D. reverberating E. None of the choices is correct.
Where is the depressor anguli oris?
a) K b) L c) M d) N e) None of these choices
The slightly lower pH of venous blood compared to arterial blood is caused by:
a. the lower oxygen level of venous blood b. the influx of lactic acid in venous blood c. the influx of carbon dioxide in venous blood d. all of the above
An agonist for elbow flexion is ________, whereas the ________ is an antagonist to this movement
A) triceps brachii, brachialis B) deltoid, biceps brachii C) biceps brachii, triceps brachii D) brachioradialis, deltoid