What valve prevents blood from moving back from the right ventricle into the right atrium during ventricular systole?
A) bicuspid (mitral) valve
B) tricuspid valve
C) aortic semilunar valve
D) pulmonary semilunar valve
Answer: B) tricuspid valve
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In the diagram, where is the epiphyseal vein?
a) A b) B c) C d) D e) E
The teniae coli are
A) external pouches along the entire length of the colon. B) bands of smooth muscle on the surface of the colon. C) highly flexible ridges in the mucosa of the colon. D) polyps that obstruct the sigmoid colon and the rectum. E) tumors that are found in the ascending colon.
All sympathetic postganglionic adrenergic fibers secrete adrenaline.
Answer the following statement true (T) or false (F)
The decreased lens elasticity associated with aging that makes it difficult to focus on near objects is known as:
A) myopia B) presbyopia C) strabismus D) hyperopia E) hemianopia