WEEK 6: DEFENDING THE BODY

Question 1

What is immunity?

Answer 1

-body’s ability to resist or eliminate potentially
harmful foreign materials or abnormal cells

Question 2

What is immunity?

Answer 2

-network of cells, tissues, and organs that work together to defend the body against attacks by “foreign” invaders.

Question 3

Outline the activities/ functions of the immune system.

Answer 3

*Removal of ‘worn-out‘ cells & tissues
*Defense against invading pathogens
*Identify & destroy abnormal or mutant cells
*Inappropriate responses-allergies; autoimmune

Question 4

Outline cells of the immune system.

Answer 4

5 WBC

Question 5

Outline the ‘Immune system – levels of defense’

Answer 5

*Physical barriers
*Innate immune system
*Adaptive immune system

Question 6

Differentiate Innate vs. Adaptive immune system.

Answer 6

INNATE
*Not antigen specific
*Exposure does not result in immunological memory
*There is immediate maximal response
*Antigen independent.

ADAPTIVE
*Antigen specific
*Memory cells and immunity established
*There is lag time between exposure and immune response
*Antigen dependent

Question 7

Outline innate immunity cells.

Answer 7

Neutrophils
Dendritic cells
Macrophages
Natural killer cells