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CCTC Study Guide Questions with All Correct Answers What types of cells are considered APC's - Answer- Dendritic Cells, Monocytes and Macrophages APC's are known as scavengers-why? - Answer- they engulf debris of dead cells especially in apoptotic cell death which cells engulf foreign c...

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  • October 3, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
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  • cctc
  • cctc study guide
  • cctc study guide questions with all correct answer
  • what types of cells are considered apcs

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CCTC Study Guide Questions with
All Correct Answers

What types of cells are considered APC's - Answer- Dendritic Cells, Monocytes and
Macrophages

APC's are known as scavengers-why? - Answer- they engulf debris of dead cells
especially in apoptotic cell death

which cells engulf foreign cells and express them on cell surface? - Answer-
macrophages

What activates APC's - Answer- if they eat a foreign antigen

Direct Pathway for APC always comes from the:
a. donor
b. recipient - Answer- A. Donor

Donor APC's are also known as - Answer- Passenger Leukocytes (along for the ride
with the donor organ)

Indirect Pathway for APC always comes from the:
a. recipient
b. donor - Answer- A. Recipient

How do Recipient APC's function - Answer- they can absorb and present foreign donor
antigens and present them to CD4 T helper cells

which cells are key to recognizing foreign proteins - Answer- Lymphocytes

How do lymphocytes function - Answer- they mount a response to foreign antigens

name the 3 t-cell sub-groups based - Answer- Helper = CD4
Cytotoxic = CD8
B Lymphocytes

t helper cells - CD4 - Answer- directly communicate with other cells and communicate
via cytokines

what are the two types of t helper cells - Answer- t helper 1 (with cellular response)

, t helper 2 ( with humoral response)

t helper 1's bind with... - Answer- class two antigens

what order does the cellular response happen - Answer- t helper 1's bind, release IL2,
stimulates effector t-cells (aka CD8) or macrophage, once activated they attack donor
cells

what is the mechanism of the humoral response - Answer- t helper 2 secretes IL4, Il5,
Il6

what stimulates the proliferation of B lymphocytes - Answer- the secretion of IL4-IL6

B lymphocytes turn into what - Answer- plasma cells

Plasma cells produce what? - Answer- antibodies

Cytotoxic T cells are otherwise known as - Answer- CD8 cells

what are CD8 cells activated by - Answer- IL2 release

How do CD8 cells kill target cells - Answer- adhering to foreign antigens associated with
class 1 molecules

name a co receptor molecule on a cell membrane - Answer- CD8 cell

Where are B lymphocytes made? - Answer- bone marrow



3 a's in cellular immunity - Answer- antigen cells (macrophages), Alert helper T cells
that a foreign (non self) entity is present, Activate mechanism to destroy non self cells

what mechanism activates cellular immunity - Answer- determined by reticuloendothelial
system

Name the three Immune System Protection Mechanisms - Answer- surveillance,
defense and homeostasis

Surveillance - Answer- recognize antigens (foreign) on cell membranes and
microorganisms

Defence - Answer- destruction of foreign entities and specific targeting thru Humoral or
Cellular Mechanism

Homeostasis - Answer- Balance protection and destruction

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