A drug that decreased calcium levels in a muscle cell and thereby lowered the number of crossbridges formed during the heart's contractions would be a
A. positive chronotropic agent.
B. negative chronotropic agent.
C. positive inotropic agent.
D. negative inotropic agent.
D
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The spinous process extends posteriorly from the union of the
A. transverse processes. B. laminae. C. pedicles. D. superior and inferior articulating processes.
What group of chemicals works by destroying tissue at the site of application?
a. keratolytics b. antifungals c. antiseborrheals d. caustics
When during human development does the process of ossification begin?
A. 8th-9th month of fetal development B. 12 weeks after birth C. 10-25 years of age D. 3-4 months of age E. 12th-13th week of embryonic development
Layers of bone matrix found near the surface of the bone are called:
a. lacuna b. interstitial lamella c. concentric lamella d. circumferential lamella