Definitions

Question 0

Lymph Nodes

Answer 0

Bean shaped structure

Filters foreign pathogens by trapping them in fibres

Question 1

MHC

Answer 1

Major Histocompatibility Complex
Has both self and non-self antigens on it
Expressed on surface of cells

Question 2

Leukocytes

Answer 2

General term for white blood cells

Question 3

Lymphocytes

Answer 3

WBC produced by Primary lymphoid tissue and exist in blood and lymph

Question 4

What do all the cells in the 2nd line of defense respond to and how?

Answer 4

ANTIGENS by membrane receptors

Question 5

Phagocytes

Answer 5

Engulf and digest foreign material, damaged cells and debris
Chemically attracted to damaged region/infection site
Have receptors on their surface

Question 6

Macrophage

Answer 6

Phgocytic Lymphocyte that is non-specific and is the cell that gobbles and presents T cells with an antigen

Question 7

Eosiniphils

Answer 7

Their enzymes make holes in pathogens

Question 8

Basophils and Mast Cells

Answer 8

Produce histamines which make blood vessels dialiate and permeate, allowing other cells to reach infected tissue (causes swelling)

Question 9

Cytotoxic

Answer 9

Kill cells by releasing cytoplasmic proteins to induce apoptosis (apoptosis = normal death)

Question 10

NK cells

Answer 10

Natural killer cells
Mature in bone marrow (not B or T cell though)
Cytotoxic - kills cells by relasing cytoplasmic proteins that induce apoptosis
Initiated by interferons

Question 11

Interferon

Answer 11

A natural protein produced in response to viral entry that has the ability to disable viral replication