Due to the structure of the ________, a large amount of moisture is added to the respiratory system every day.
A. nares
B. trachea
C. conchae
D. eustachian tubes
Answer: C
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Thyroxin and triiodothyronine, hormones necessary for cell metabolism, are produced in the ________ gland.
A. pituitary B. adrenal C. thymus D. thyroid
Which is not a function of the respiratory system?
A. Gas conditioning B. Sound reception C. Gas exchange D. Olfaction
Quincy suffers a hit to the skull that fractures the right superior lateral surface of his cranium. Which bone is fractured?
A) right temporal bone B) occipital bone C) right parietal bone D) right sphenoid bone E) frontal bone
Carbon-12 and carbon-14 are isotopes. How are they different from each other?
A. different numbers of protons B. different numbers of neutrons C. different numbers of electrons D. they can form different numbers of chemical bonds E. different number of energy shells