Immunity

Question 1

What are parasites

Answer 1

are organisms that live in or an a host and gain nutrients and protection from the host organisms

Question 2

What are examples of human pathogens?

Answer 2

viruses, bacteria, protoctists, fungi, worms, prions

Question 3

What are 3 types of defences against infectious diseases?

Answer 3

mechanical- tissues provide physical barriers that pathogens cannot pass through unaided
chemical- substances secreted by the body provide inhospitable environments for pathogens
cellular- cells secrete hormone like chemicals to alert the body to the presence of pathogens

Question 4

What is immune response?

Answer 4

is how your body recognizes and defends itself against bacteria, viruses, and substances that appear foreign and harmful

Question 5

What is inflammation?

Answer 5

where histamine stimulates a range of non specific defences

Question 6

What are phagocytes?

Answer 6

a cell (as a white blood cell) that takes in and breaks down foreign material (as bacteria) and waste.

Question 7

What is humoral immune response?

Answer 7

involves the production of antibodies by b cells

Question 8

What are cell mediated immune response?

Answer 8

does not involve b cells and antibodies, it involves cytotoxic T cells