Which of the following is the first line of defense?
A. histamine, prostaglandin and leukotriene production
B. intact skin, mucous membranes, sebum, tears, and sweat
C. phagocytes
D. the coating of a pathogen by complement
E. nonspecific leukocytes secreting toxins onto the surface of virally infected cells
Answer: B
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Which of the following statements about bone marrow is false?
A. It is found only in the marrow cavity within the diaphysis. B. Some types of marrow produce blood cells. C. Some types of marrow contain fat cells. D. Some types of marrow produce immune system cells. E. None of the answer options is false.
The average adult has approximately 100,000 leukocytes per mm3 of blood.
Answer the following statement true (T) or false (F)
Which of the following statements is NOT true about the cell cycle?
a. M phase is after S phase b. In S phase, all the DNA in the cell is duplicated c. G1 and G2 together encompass interphase d. Prophase is part of M phase e. Cells not actively growing are in G0
The eukaryotic cell will complete the portion of the cell cycle will lead to
A. synthesis; build the two new daughter cells from the original one cell. B. cytokinesis; move the centrioles, centrosomes, and mitotic spindle into position to pull chromosomes apart. C. interphase; build the mitotic spindle and metaphase plate between original and replicate chromosome groups. D. mitosis; divide the original and replicated chromosomes for the cell to divide into two daughter cells. E. binary fission; divide the original and replicated chromosomes.