The ____ is composed of endothelium and is continuous with the endocardium of hte heart.
A) tunica externa
B) tunica media
C) tunica interna
D) tunica casino
Answer: C) tunica interna
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ADP released by platelets is involved in reducing blood flow through an injured vessel by
a. causing the vascular musculature to remain contracted longer during the vascular spasm. b. causing the surface of nearby endothelial cells to become sticky so that platelets will stick to them, enhancing aggregation of platelets. c. causing the surface of nearby platelets to become sticky so that platelets will stick to them, enhancing aggregation of platelets. d. increasing the release of fibrinogen by activated platelets. e. all of these.
The most complicated spinal reflexes are called
A) collateral reflex arcs. B) ipsilateral reflex arcs. C) intersegmental reflex arcs. D) dermatomes. E) spinal plexuses.
What is the function of the nasal conchae?
A. increases turbulence in the airflow B. olfaction C. increases surface area for cleaning, warming, and moisturizing the air D. increases turbulence and surface area for cleaning, warming and moisturizing the air
The number of vertebrae in an adult is
A. 26. B. 28. C. 30. D. 32. E. 33.