BIO Exam 2pt2

Question 1

How do T-cells recognize healthy cells from sick cells?

Answer 1

They bind to and analyze a protein marker found on all of your cells called the MHC.

Question 2

What is positive selection?

Answer 2

Ensures that all of your Tc, Th, cells recognize your MHC (recognize self tissue from foreign tissue.

Question 3

What is Negative selection?

Answer 3

Ensures your T-cells do not kill healthy body cells with normal healthy proteins displayed in your MHC

Question 4

What binds to MHC-2?

Answer 4

T helper Cells

Question 5

What is the primary signal between an APC and a T helper cell?

Answer 5

It is the T-cell receptor binding to the MHC 2/Antigen complex.

Question 6

FAB

Answer 6

antigen binding fragment antigen is going to bind here.

Question 7

FC

Answer 7

Crystalizing fragment

Question 8

After a bacterium is phagocytized by a neutrophil, where is it digested?

Answer 8

Phagolysosome

Question 9

what are the optimism (sticks bacteria to phagocytes) are in the body?

Answer 9

C3b, antibodies

Question 10

Antibodies that bind to a gram-negative cell most likely bind to which structure?

Answer 10

O-polysaccharide

Question 11

What is the role of Interferon?

Answer 11

Antiviral

Question 12

The T Cell Receptors (TCR) on T-helper cells bind to

Answer 12

The MHC II/antigen complex on antigen presenting cells

Question 13

Which of the following is specifically associated with parasites?

Answer 13

Eosinophils

Question 14

What biological signal causes B-cells cells to produce IL-2 receptors?

Answer 14

MHC antigen complex binds to BCR