Immune system

Question 1

What are microbes

Answer 1

Viruses
Bacteria
Fungi
Protozoa

Question 2

What are the two types of lymphoid organs

Answer 2

Primary lymphoid organs
- production of white blood cells
These are the thymus and bone marrow
Secondary lymphoid organs
- Sites where the immune responses are initiated
These are the the tonsils, spleen and lymph nodes

Question 3

Thymus

Answer 3

School for white blood cells called T cells

Question 4

Spleen

Answer 4

Site of initiation for immune responses against blood bourne pathogens

Question 5

Lymph nodes

Answer 5

Filter lymph fluid from blood and tissue

Question 6

three layer of immune system defence

Answer 6

1. chemical and physical barriers
2. innate
3. adaptive

Question 7

What are the physical barriers of the immune system

Answer 7

The skin
- epidermis - dead cells, keratin, and phagocytic immune cells
- dermis - thick layer of connective tissue, collagen, and blood vessels

Question 8

What are the chemical barriers of the immune system

Answer 8

Antimicrobial peptides
Lysozyme - breaks down bacterial cells walls
Sebum - Low pH
Salt - Hypertonic

Question 9

Features of mucous membranes

Answer 9

1-2 layers
Epithelium - tightly packed live cells, constantly being renewed
Line the parts of the body that lead to the outside

Question 10

What are the chemical defences of mucosal surfaces

Answer 10

Stomach - low pH
Gall bladder - bile
Intestine - digestove enzymes
mucus
defensins
lysozyme

Question 11

Innate vs adaptive immunity