Drugs

Question 1

how does skin protect the human body?

Answer 1

• protective layer, consists of dead cells
• difficult for pathogens to penetrate
• sebum/oil kills bacteria

Question 2

how does cilia protect the human body?

Answer 2

• waft pathogens to mouth to cough out
• or stomach to be digested/destroyed by stomach acid

Question 3

how does stomach acid protect the human body?

Answer 3

PH1 kills most ingested pathogens

Question 4

how does tear glands protect the human body?

Answer 4

• antimicrobial properties in tears

Question 5

how does the nose protect human body?

Answer 5

• nasal hairs and sticky mucus and cilia prevent pathogens entering nostrils

Question 6

how does the trachea/bronchus protect the human body?

Answer 6

• lined with mucus to trap dust and pathogens, cilia move the mucus up to be swallowed

Question 7

what do phagocytes do?

Answer 7

• engulf and destroy pathogens

Question 8

what do lymphocytes do?

Answer 8

• memory cells
• make specific antibodies to attach to and destroy antigen on pathogen
• release antitoxins, neutralise toxins from bacteria