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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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.
________ is a disorder in which the penis cannot attain full erection or maintain an erection.
A. Erectile dysfunction B. Incontinence C. Prostatitis D. Melanoma
The predominant extracellular anion is ________.
A. protein B. bicarbonate C. phosphate D. Na+ E. Cl?
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.