IB Biology 6.3 Defense Against Infectious Disease

Select all physical barriers making up 1st line of defence

• phagocytes

• mucous

• skin

• cilia

Hair-like structures lining trachea and moving pathogens out of the tract

• cilia

• phagocytes

• pneumocytes

• mucous

Enzyme found in mucous, tears and saliva which destroys bacterial cell walls

• lysosase

• bacterialwallase

• lysozyme

• lysosome

Damaged cells release chemicals which

• cause platelets to stick to damaged area

• convert prothrombin to thrombin

• convert fibrinogen to fibrin

• cause fibrin to form a mesh

platelets

• cause platelets to stick to damaged area

• form a mesh of fibres

• convert fibrinogen to fibrin

• release clotting factors which are involved in producing thrombin

Thrombin is formed from

• prethrombin

• prothrombin

• post thrombin

• fibrinogen

fibrinogen is

• soluble

• insoluble

fibrin is

• soluble

• insoluble

A blood clot is made up of (select all)

• fibrin

• platelets

• blood cells

• fibrinogen

The formation of a blood clot within a blood vessel is known as

• emphysema

• thrombosis

• fibrillation

• coronation