The root of a tooth is covered by
A) enamel.
B) cement.
C) dentin.
D) pulp.
E) the root canal.
Answer: B
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Towards the end of erythropoiesis in the bone marrow, a red blood cell loses its nucleus and becomes a
a) proerythroblast. b) megakaryocyte. c) progenitor cell. d) mature erythrocyte. e) reticulocyte.
Which action leads to the closure of the right atrioventricular valve?
A. Contraction of the right atrium B. Contraction of the left atrium C. Contraction of the right ventricle D. Relaxation of the right ventricle E. Relaxation of the left atrium
Nuclear medicine is a branch of medicine that uses radioactive isotopes to prevent, diagnose, and treat disease.?
Indicate whether the statement is true or false
The left primary bronchus is shorter, wider, and more vertically oriented than the right primary bronchus.
Answer the following statement true (T) or false (F)