Vasopressin secretion
a. induces the kidneys to produce a small volume of concentrated urine.
b. is stimulated when the body fluids are hypertonic.
c. is inhibited when the arterial blood pressure is dangerously low.
d. both (a) and (b) above.
e. all of these answers.
D
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PO2 in the blood
a. refers to the pressure exerted by the amount of oxygen dissolved in the blood. b. is the most important factor determining the percent saturation of hemoglobin. c. is normal in carbon monoxide poisoning. d. two of these answers. e. all of these answers.
While sitting at your desk, you drop your pencil onto the floor. You bend over to pick up the pencil. In order to straighten up and continue your exam, you must use which of the following muscles?
A. Erector spinae B. Tibialis anterior C. Tibialis anterior and semimembranosus D. Semimembranosus E. Extensor hallucis longus
Conduction deafness occurs when sound waves cannot reach the fluids of the inner ear. Which one of the conditions below will not cause conduction deafness?
A) a perforated eardrum B) damage to the ossicles C) damage to cochlear hair cells D) inflammation of the middle ear
Water molecules rely on ________ to hold them together
A) ionic bonds B) hydrogen bonds C) polar covalent bonds D) nonpolar covalent bonds