Which one of the following is TRUE regarding the spleen?
A) It is located in the lower portion of the thoracic cavity.
B) Red pulp of the spleen stores excess blood.
C) White pulp of the spleen contains macrophages that kill microorganisms circulating in the lymph.
D) Red pulp of the spleen contains primarily lymphocytes.
E) The spleen has the same functions as the tonsils.
B
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Which of the following is the proper sequence
for mitosis? I. metaphase II. telophase III. prophase IV. anaphase a. I, III, IV, II b. I, II, III, IV c. III, I, IV, II d. IV, I, III, II e. III, IV, I, II
Nitrogen is released into the atmosphere by
a. nitrogen fixation. b. denitrification. c. nitrification. d. ammonification. e. decomposition
The vessel that collects blood from the superficial structures of the head and neck is the ________ vein.
A) external carotid B) internal carotid C) external jugular D) internal jugular E) All of the answers are correct.
Which of the following is NOT a nitrogenous base in DNA?
A.) Adenine B.) Thymine C.) Guanine D.) Uracil