A class-2 MHC molecule is used to present a foreign antigen to ________.
A. cytotoxic T cells
B. regulatory T cells
C. B lymphocyte
D. helper T cells
Answer: D
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Wrinkles in the skin can be caused by
A) collagen disorders. B) increasing age. C) changes in levels of hormones. D) the cumulative effects of ultraviolet radiation. E) All of the answers are correct.
Which of these does NOT increase the risk for cardiovascular disease?
A) menopause without estrogen replacement therapy B) having diabetes mellitus C) being a female over 30 but under 55 D) being a male over 30 but under 55 E) having a sister with coronary artery disease
Protection of vital organs and hematopoiesis are two functions commonly named for the ________ skeleton.
A. axial B. appendicular
The embryo will develop from the ________ of the blastocyst.
A. trophoblast B. embryonic disk C. inner cell mass D. amnion