Lymphatic and Immune Systems

Question 1

First, Second and Third Line of Defense

Answer 1

1st line of defense: Physical barriers (like skin) that stop the pathogens from entering
2nd line of defense: Non specific innate response
3rd line of defense: Acquired immunity

Question 2

What type of immunity are T cells responsible for?

Answer 2

Cell-Mediated Immunity:

- The target for destruction cells that are presenting a specific antigen

Question 3

What type of immunity are B cells responsible for?

Answer 3

Humoral Immunity:

- Activated B cells become plasma cells that produce antibodies

Question 4

Active Immunity

Answer 4

• Develops naturally after an individual is infected with a pathogen

Question 5

Passive immunity

Answer 5

• Individual is given prepared antibodies via an injection

- Temporary

Question 6

APC (antigen presenting cell)

Answer 6

• Help T cells recognize antigens

Question 7

Prions

Answer 7

• Infectious particles made strictly of proteins

- Cause a group of degenerative diseases of the nervous system

Question 8

Viruses

Answer 8

• Intracellular parasites, meaning they need to use a host cell to reproduce
• Not made of cells
• Composed of an outer capsid and inner core

Question 9

HIV/AIDS

Answer 9

• Originated in Africa
  Phases: Acute phase (asymptomatic, highly infections, CD4 T cells are at least 800 cells), Chronic Phase (impaired immune system, yeast infections of mouth or vagina, cervical dysplasia, prolonged diarrhea, thick sores on the tongue, swollen lymph nodes, fevers, fatigue, coughs, and diarrhea. CD4 T-cell count is between 499 and 200) AIDS (no cure, there is treatment, CD4 T-cell count has fallen below 200 cells/mm^3)