Immune System

Question 1

Two types of specific defense?

Answer 1

• Humoral

- Cell mediated

Question 2

What is considered humoral immunity?

Answer 2

-B Lymphocytes:

• memory cells- remember antigen, speed up secondary response
• plasma cells- make and release antibodies which induce antigen phagocytosis (IgG, IgA, IgM, IgD, IgE)
• active and passive immunity

Question 3

Active immunity?

Answer 3

antibodies are produced during an immune response

Question 4

Passive immunity?

Answer 4

antibodies are produced by one organism are transferred to another organism

Question 5

Cell mediated?

Answer 5

-T Lymphocytes:

• cytotoxic T cells- destroy cells directly
• helper T cells- activate B and T cells and macrophages by secreting lymphokines
• suppressor T cells- regulate B and T cells to decrease anti antigen activity
• memory cells

Question 6

Nonspecific immune response?

Answer 6

-includes skin, passages lined with cilia, macrophages, inflammatory response, interferons (proteins that help prevent spread of virus)

Question 7

Lymphatic system?

Answer 7

• lymph vessels meet at the thoracic duct in the upper chest and neck, draining into the left subclavian vein and cardio system
• vessels carry lymph (excess interstitial fluid) and lacteals collect fats by absorbing chylomicrons in small intestine

Question 8

Lymph nodes?

Answer 8

are swellings along the vessels with phagocytotic cells (leukocytes), they remove foreign particles from lymph