EXAM 2 BIO 202: RIO BIO 202, 2025/2026 WITH CORRECT/ACCURATE ANSWERS

EXAM 2 BIO 202: RIO BIO 202,
2025/2026 WITH CORRECT/ACCURATE
ANSWERS
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Two Types of Defense - CORRECT ANSWERS- -innate

-adaptive



Innate Defense - CORRECT ANSWERS- - comprised of Surface
Barriers (1st line-skin, mucous membrane) and Internal Defenses
(2nd line-phagocytes, fever, NK cells, Antimicrobial proteins,
Inflammation)



Adaptive Defense - CORRECT ANSWERS- -a. 3rd line defense,
Humoral Immunity (B cells) and Cellular Immunity (T cells)



Antigen - CORRECT ANSWERS- -produces mobilization and
activation of immune response



Two Types of Antigens - CORRECT ANSWERS- - Complete

-incomplete



Complete Antigen - CORRECT ANSWERS- -possess
Immunogenicity (ability to stimulate lymphocyte/antibody) and
Reactivity (ability to react with lymphocyte/ antibody)

, Incomplete Antigen - CORRECT ANSWERS- -aka Haptens, possess
reactivity not immunogenicity unless attached to protein carrier



T-Cells - CORRECT ANSWERS- -originate in 'T'hymus, receptors
are NOT antibodies

-possess Positive Selection (MHC restriction process) and
Negative Selection (prevents reaction to self-antigens)



B-Cells - CORRECT ANSWERS- -originate in 'B'one Marrow

-receptors are membrane-bound antibodies

-clonal deletion (apoptosis) and receptor editing (change self-
reactive antigen receptor)



Humoral Immunity - CORRECT ANSWERS- -Humoral Immune
Response occurs when an invading antigen encounters a naïve B
cell lymphocyte and antibodies are produced to counteract the
invader

-clonal selection

- Primary Immune Response

-Secondary Immune Response



Clonal Selection - CORRECT ANSWERS- multiplication of B cell
into an army of cells with antigen-specific receptors