14. In adults, the blood cells are generated primarily in ____.
E. red bone marrow
15. Erythrocytes normally circulate in blood stream for an average of ___.
E. 4 months
16. Which organ is especially involved in breaking up old erythrocytes?
B. bone marrow
17. The primary function of leukocytes is to ___.
C. kill pathogens such as bacteria
18. Which of the following is a normal hematocrit value?
19. The most abundant leukocytes in normal circulating blood are ____.
20. Which of the hormones stimulates production of red blood cells?
21. A patient, who lost two kidneys and survive on dialysis, most likely has a ___.
C. low erythrocyte count
22. Under which condition more erythrocytes are produced?
23. In response to inflammation, leukocyte count can increase to 3-4 folds of its normal value of ___.
24. Leukocytes usually stay only in the blood stream.
A. The above statement is true.
B. The above statement is false.
B. the Above is false
25. Which of the following steps is not involved in the attack of bacteria which invade in a tissue outside blood vessels?
26. The majority of leukocytes can live ____.
A. for several hours to several days