PNB 2265 Exam 3 Questions with Correct Answers.

PNB 2265 Exam 3
Questions with Correct
Answers.

,innate immune system

a collection of nonspecific barriers and cellular responses that serve as an inborn first and second line of
defense against pathogens

-genetically determined




adaptive immune system

a kind of immunity in which antibodies respond to a particular antigen to differentiate self from non-self

-exposure required




colony stimulating factors

stimulate growth and differentiation of immature leukocytes in bone marrow




interleukins

proteins that stimulate the growth of B and T lymphocytes




what cells are differentiated in the bone marrow?

B cells, NK cells




what cells are differentiated in the thymus?

T cells

, interferons

Antiviral proteins secreted by T cells that help slow the spread of disease




alpha interferons

produced by leukocytes, stimulate NK cells




beta interferons

secreted by fibroblasts, slow inflammation




gamma interferons

secreted by T and NK cells, stimulate macrophage activity




classical pathway

begins when the inactive complement protein c1 binds to antibodies bound to antigen




alternative pathway

begins when the complement protein c3b binds to the surface of a microbe