Which mature cells do not have a nucleus?
A. Columnar cells of small intestines
B. Columnar cells of upper respiratory tract
C. Sperm cells
D. Red blood cells
E. Macrophages (large, mobile white blood cells)
Answer: D
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The enhancement of sperm's ability to fertilize in the male and female reproductive tracts is known as:
a. activation b. capacitation c. synergistic response d. initiation e. ignition
With ____, the body fails to recognize and tolerate particular self-antigens
a. delayed hypersensitivity b. autoimmune disease c. immune-complex disease d. immediate hypersensitivity e. inflammation
The skin makes up what percentage of body weight?
A. 25% B. 50% C. 15% D. 10%
One of the most crucial factors in the development of fatigue appears to be a depletion of ATP
Indicate whether this statement is true or false.