The common lymphoid progenitor cell gives rise to all of the following cell lines EXCEPT
A. dendritic cells.
B. megakaryocytes.
C. natural killer cells.
D. pre-pro B cells.
E. T-cell progenitor.
B
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Contraceptive foams, creams, and jellies must be inserted
A. deep in the vagina near the cervix. B. in the uterus. C. at the vaginal opening. D. 3 hours before intercourse.
Answer the following statements true (T) or false (F)
1. African American men have an increased risk of prostate cancer compared with other populations. 2. Unprotected sex is a risk factor for cervical cancer. 3. Uterine cancer mostly affects women under the age of 40. 4. Exposure to ultraviolet radiation is the primary cause of skin cancers.
All of the following are biological effects mediated by the products of mast cells except _____
a. chemotaxis of neutrophils, eosinophils, and effector T cells b. growth factor secretion c. smooth muscle contraction d. connective tissue remodeling e. All of the above are mediated by mast cells.
Which of the following exercise safety guidelines for strength training also applies to aerobic exercise?
A. Use proper lifting technique B. At the end of the workout, stretch for a few minutes. C. Don't lock your elbows and knee joints D. Exercise larger muscle groups before smaller muscle groups E. Avoid holding your breath while straining