If a blood cell is placed in a hypertonic solution:
a. water will enter the cell
b. water will leave the cell
c. it will crenate
d. both B and C above
d. both B and C above
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The predominant extracellular anion is ________.
A. protein B. bicarbonate C. phosphate D. Na+ E. Cl?
________ is a disorder in which the penis cannot attain full erection or maintain an erection.
A. Erectile dysfunction B. Incontinence C. Prostatitis D. Melanoma
Movements of the body are usually smooth and occur at differing rates because
A. of the all-or-none principle. B. most muscle contractions closely resemble individual muscle twitches. C. they are a mixture of isotonic and isometric contractions. D. motor units contract out of phase at their own particular rates. E. muscles of different sizes contract at different rates.
Which of the following account for why the number of bones in the adult skeleton may vary. Select all that apply.
__X__ There is a variable presence of sesamoid bones. _____ Some bones may disappear in response to mechanical stress. __X__ There is a variable number of sutural bones. _____ There are fontanels in the skull of an infant.