Leukocytosis-promoting factor, among other things, acts to encourage the movement of white blood cells to the site of an injury. Which hormone opposes this action?
A) epinephrine
B) insulin
C) TH
D) cortisol
D
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What cells are the precursors of macrophages?
A. B cells B. macrophages C. plasma cells D. T cells E. monocytes
The cell that participates in both the innate and adaptive defense by presenting antigens to activate helper T cells is the
A. B cell. B. T cell. C. macrophage. D. plasma cell. E. chondrocyte.
The best way to increase muscle endurance is through _______ .
a. chemical supplements b. a proper diet c. lots of rest d. aerobic training e. strength training
Why do most angiosperms have alternate phyllotaxy, with leaf emergence at an angle of 137.5° compared to leaves above and below?
A) To allow maximum exposure to light B) To promote a leaf area index above 8 C) To reduce shading of lower leaves D) To allow maximum exposure to light and to reduce shading of lower leaves