Embryonic stem cells growing in a lab dish are bathed in a "cocktail" of chemicals that cause them to specialize into branching networks of single-nucleated cells that pulsate in unison. This tissue is most likely
A. epithelial tissue.
B. cardiac muscle.
C. skeletal muscle.
D. smooth muscle.
Answer: B
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Which type of blood vessel holds the greatest volume of blood?
A. Vein B. Artery C. Arteriole D. Capillary
In some individuals the supra-orbital foramen is incomplete and called the
A) supra-orbital fissure. B) supra-orbital suture. C) supra-orbital fontanelle. D) supra-orbital notch. E) supra-orbital meatus.
The humerus is an example of:
a. a short bone b. a long bone c. a flat bone d. an irregular bone
Select the correct statement about the heart valves.
A) The mitral valve separates the right atrium from the right ventricle. B) The tricuspid valve divides the left atrium from the left ventricle. C) Aortic and pulmonary valves control the flow of blood into the heart. D) The AV valves are supported by chordae tendineae so that regurgitation of blood into the atria during ventricular contraction does not occur.