Structure of the Immune System

Question 1

The immune system can be split into two immunities, what are they?

Answer 1

innate and adaptive

Question 2

Innate immunity

Answer 2

this is composed of defenses that are always active, but that cannot target a specific invader and cannot maintain immunologic memory; this is also called nonspecific immunity

Question 3

Adaptive immunity

Answer 3

this is composed of defenses that take time to activate, but that target a specific invader and can maintain immunologic memory; also called specific immunity

Question 4

the immune system is dispersed in the body, name some of the places

Answer 4

• bone marrow: immune cells come from here
• the spleen and lymph nodes: these are sites where immune responses can be mounted, and in which B-cells are activated
• the thymus: this is the site of T-cell maturation

Question 5

what are leukocytes?

Answer 5

white blood cells that are involved in immune defenses