White Blood Cells

Question 1

State types of white cells

Answer 1

.Neutrophils
.Lymphocytes
.T-Cells
.B-Cells

Question 2

What are the function of neutrophils?

Answer 2

Their role is to engulf and destroy pathogens in the process of phagocytosis.

Question 3

Where are neutrophils found?

Answer 3

In the blood stream

Question 4

How is phagocytosis carried out?

Answer 4

1) Phagocyte detects foreign antigens on the surface of a pathogen
2) Phagocyte engulfs the pathogen to form a vacuole
3) Lysosomes empty their contents into the vacuole
4) Lysosomes release lysozymes that hydrolyse protein + lipids to digest and destroy the pathogen

Question 5

How are neutrophils adapted to migrate from the bloodstream into tissues in response to infection?

Answer 5

• Have multi-lobed nucleus which enables them to squeeze through small gaps in dilated blood vessels by extravasation.
• Cell membrane is also flexible

Question 6

How are neutrophils adapted to respond to chemicals secreted by immune system and pathogens?

Answer 6

.They have special cell surface receptors which allows the neutrophil to respond to infections and migrate towards pathogens.