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BIOL 133 Ch. 17 Genetics of Immunity with 100- correct answers 2025.
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BIOL 133 Ch. 17 Genetics of Immunity with 100- correct answers 2025.
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BIOL 133: Ch. 17 Genetics ofImmunity with 100% correct
answers 2025
When a B cell is activated by a T cell, the B cell proliferates into two types
of cells: ________ cells, which secrete antibodies, and memory cells, which
are involved in the secondary immune response - answer plasma
Interferons and interleukins are types of - answer cytokines
Identify the modes of action of complement proteins. - answer - They
dismantle viruses
- They puncture bacterial plasma membranes
Rank the steps that lead to the formation of plasma and memory cells in
the correct order. Start with the earliest on top. - answer - An antigen-
presenting macrophage activates a T cell
- The T cell contacts a B cell that has surface receptors that can bind the
type of foreign antigen the macrophage presents
- Once an activated T cell finds a B cell match, it releases cytokines that
stimulate the B cell to divide
- The B cell gives rise to two types of cells -- plasma and memory cells
What type of disease does interleukin-2 treat? - answer Kidney cancer
recurrence
What type of disease do colony-stimulating factors treat? - answer Boost
white blood cell levels in people with suppressed immune systems, such
as individuals with AIDS
Disease-causing microorganisms are known by what term? - answer
Pathogens
, Diverse immunity - answer Vanquishes many types of pathogens
Specific immunity - answer Distinguishes the cells and molecules that
cause disease from those that are harmless
Memory immunity - answer Responds faster to a subsequent encounter
with a foreign antigen than it did the first time
A major participant in innate immunity is the _______________ system, which
consists of plasma proteins that assist several other defenses. For
example, some of these plasma proteins dismantle viruses while others
attract phagocytes to an injury site. - answer complement
What are the two components of the adaptive immune response? - answer
humoral, cellular
Rank the different steps that occur during HIV infection in the correct
order. Start with the earliest on top. - answer - In macrophages and
helper T cells, the virus adheres with its surface protein, gp120, to two
coreceptors on the host cell surface, CD4 and CCR5
- Another glycoprotein, gp41, anchors gp120 molecules into the viral
envelope
- When the virus binds both coreceptors, virus and cell surface contort in a
way that enables viruses to enter the cell
- Once in the cell, reverse transcriptase copies the viral RNA into DNA
- The viral DNA then enters the nucleus and inserts into a chromosome,
and new viral particles are formed
The complement system triggers the release of histamine that ___________ -
answer dilates blood vessels, increasing fluid flow to the infected area
The viruses that causes AIDS is called ________ - answer HIV
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