The upper end of each ureter flares into a funnel-shaped structure known as the renal _____.?
A) ?pelvis
B) ?pyramid
C) ?papilla
D) ?column
A
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The nuclear envelope consists primarily of
A. a double helix of DNA. B. ribosomal subunits. C. two phospholipid bilayers. D. messenger RNA.
Cell membranes are said to be
A) freely permeable. B) actively permeable. C) impermeable. D) selectively permeable. E) None of the answers are correct.
Which of the following is an example of a hereditary abnormality?
a. aplastic anemia b. hemorrhagic anemia c. pernicious anemia d. sickle cell disease e. folic acid deficiency
What do the following statements have in common: dehydration, hypoxia, bleeding, and increased erythrocyte production?
A) They are all causes of polycythemia. B) They are all causes of anemia. C) They are all associated with normal hematocrit levels. D) They are not associated with hematocrit levels in the human body.