Lecture 20: Introduction to Blood and Immune

Question 1

What are the parts of the immune system?

Answer 1

Innate Immune System (Always Active)
Adaptive Immune System (Activated by Exposure)

Question 2

What is the first line of defense?

Answer 2

External Barriers
Physical:
Skin, Gastrointestinal, Mucous Membrane, Urinary Tract

Chemical:
HCl in stomach, Lysozymes in sweat/tears, Lactic Acid in vagina.

Question 3

Is the first line of defense Innate or Adaptive?

Answer 3

Innate

Question 4

What is the second line of defense?

Answer 4

Internal Barriers:
Phagocytic Cells
Natural Killer Cells
Defensive Proteins
Inflammatory Response

Question 5

What do Macrophages generally do?

Answer 5

Recognizing the Pathogen
Activating the Innate Immune System