An autoimmune disease may develop when ______.
A) complement proteins are overactive
B) the immune system attacks self-molecules
C) cytokines activate B cells
D) HIV infects helper T cells
Correct Answer:
Verified
Q11: The outer layer of the heart wall
Q21: Helper T cells secrete _.
A) antibodies that
Q22: Sympathetic nerves release the neurotransmitter _, which
Q25: Blood that is poor in oxygen returns
Q26: The _ delivers blood from the organs
Q27: Active immunity typically develops from _.
A) exposure
Q28: When the body launches a nonspecific immune
Q29: When arterioles constrict, _.
A) blood pressure increases
B)
Q30: _ is not a characteristic of inflammation.
A)
Q51: In cell-mediated immunity, _ cells attack invading
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