The main reason why an individual with type AB, Rh-negative blood cannot donate blood to an individual with type A, Rh-positive blood is because ________.
A. anti-B antibodies in the recipient will agglutinate RBCs of the donor
B. anti-B antibodies in the donor will agglutinate RBCs of the recipient
C. anti-A antibodies in the recipient will agglutinate RBCs of the donor
D. anti-A antibodies in the donor will agglutinate RBCs of the recipient
E. anti-D antibodies in the donor will agglutinate RBC of the recipient
Answer: A
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Which of the following statements concerning hair is true?
A. At puberty, much of the vellus hair is replaced with terminal hair. B. Hair in the axillary region is vellus hair after puberty. C. In males, the hairs of the beard are vellus hairs. D. Both vellus and terminal hairs are pigmented. E. The majority of hair on the chest is vellus hair.
A/an ________ is a patch of discolored skin sometimes called a birthmark.
Fill in the blank(s) with the appropriate word(s).
____________________ contractions are responsible for mixing the colonic contents, whereas ____________________ periodically propel the contents long distances
Fill in the blank(s) with correct word
Which type of cell produces new bone tissue by secreting matrix?
A. Bone-lining cells B. Osteoclasts C. Osteocytes D. Osteoprogenitor cells E. Osteoblasts