C3.2

Question 1

What is zoonosis?

Answer 1

The ability of pathogens to transfer to humans and cause disease

Question 2

What is the primary defense against disease?

Answer 2

Skin, physical barrier, sebacious glands secret sebum which is slightly acidic killing many pathogens

Question 3

What are Mucous membranes?

Answer 3

softer type of skin, found in the vaginal area, foreskin, and lungs

Question 4

What does HIV stand for?

Answer 4

Human immunodeficiency virus

Question 5

Discribe how HIV works

Answer 5

attacks the immune system by targeting CD4 T cells, a type of white blood cell. The virus enters these cells, uses them to replicate, and ultimately destroys them, weakening the body’s ability to fight off infections and diseases through disabling the ability to produce antibodies

Question 6

How to find the % difference

Answer 6

% difference = difference between two numbers /average of the two numbers x100

Question 7

List the three types of disease causes

Answer 7

Genetic - hereditary
Enviornmental
Pathogenic

Question 8

What is a pathogen

Answer 8

a disease causing organism

Question 9

Discribe blood clotting

Answer 9

Platetets detect damadge to a blood vessel and collect there forming a temperary plug
Platelets release clotting factor
Prothrombin is converted to thrombin
Then thrombin converts fibrinogen (soluble) into fibrin which is insoluble
Starts the fibers forming, creating a scap which prevents bleeding more and pathogens from getting in