Microbiology

Helpfulness: 0
Set Details Share
created 8 years ago by kmaddy
143 views
book cover
Microbiology
Chapter 17
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

List characteristics of IgD.

monomer;0.2%, B cell surface, blood, lumph, stucture resembles that of IgG. has no-well-defined function.

2

List characteristics of IgE.

monomer, .0002%, bound to mast & basophil cells throughout body, blood, alleric rxn, possibly lysis of parasitic worms,when antigen- pollen cross-links w IgE antibodies attached to a mast cell or basophil that cell releases histamine and other chemical mediators "hay fever"

3

B lymphocytes come from?
T lymphocytes come from?

B cells - bone marrow (bursa of Fabricius)humoral immunity

T cells - thymus, cellular immunity

4

adaptive immunity has:

competent cells,
self-tolerant,
immunological tolerance

5

plasma cells are?

memory cells derive from?

antibody-producing secreting cells

B cells

6

Characteristics of T lymphocytes

Y shape proteins, binds to specific antigens & make it difficult for micrboes to spread, antibodies degenerate over time (half-life)

7

Who and when produces antibodies? p.482

B lymphocytes; when they are exposed to free or extracellular, antigens.

8

What is Bursa of Fabricius? p.477

an organ in chickens if removed at young age, they do not produce antibodies.

9

humoral immunity is?

describing immunity brought about by antibodies in body fluids; aka antibody-mediated immunity, mediated by B cells,

10

antigens? 478

proteins or large polysaccharides;lipds and nucleic acids are antigenic when combined w proteins and polysaccharides.

11

T lymphocytes or T cells change into what different armies of T cells

CD4 - (TH)helper T cells, make up immune system, bind to MHC class II molecules on B cells & APCs

CD8 - (Tc)cytotoxin T cells- find foreign antigens & kill the cell that wears it. binds to MHC class I molecules.

12

How are T cells classified?

by certain glycoproteins on their surface called clusters of differentiation, or CD

13

What cells does HIV affect?

virus destroys CD4 T cells

14

What is dendritic cells?

are important in activation of CD 4 T cells,

15

Where does Tcells & B cells derive from? 486

Both from stem cells.
bone marrow of adult- B cells
thymus - T cells
Both migrate to lyphoid tissue ie. spleen, lymph nodes

16

Tc cell-T cytotoxic cells can differentiate into an

effector cell called cytotoxic T lymphocyte (CTL)

17

T cytotoxic cells, despite their name are not capable of attcking any target cells as they emerge from the thymus; they are precursors to CTLs which do have this capability.

...

18

TH1 cells-
TH2 cells -
T helper cells or CD4

1-activate cells involved in cellular immunity
2-allergic rxn & parasitic infections
4-T cells are activated by MHC class II on APCs. After binding an APC, CD4T cells secrete cytokiines that activate other T cells & B cells.