15.1 drugs

Question 1

drugs

Answer 1

any substance taken into the body that modifies or affects chemical reactions in the body

Question 2

types of medicinal drugs

Answer 2

antibiotics

Question 3

antibiotics

Answer 3

any substances taken into the body, which kills bacteria but doesn’t affect human cells

• mainly made from fungi
• kills bacteria without affecting body tissue
  E.g Penicillin

Question 4

why doesn’t antibiotics work against viruses

Answer 4

viruses have no cell walls

Question 5

how antibiotics kill bacteria

Answer 5

1) ingest antibiotic
2) breaks down cell wall
3) stops bacteria from reproducing

Question 6

antibiotic resistance

Answer 6

• overtime, bacteria can become resistant to certain antibiotics
  (example of natural selection)
• in large population of bacteria, some may not be affected by antibiotic
• these survive & reproduce , creating more bacteria that are not affected

Question 7

what is resistant to most antibiotics

Answer 7

MRSA - methicillin resistant staphylococcus aureus

Question 8

how to minimise development of antibiotic resistance

Answer 8

1. avoid unnecessary use of antibiotics
2. always complete full course of prescribed antibiotics
3. develop new antibiotics to fight bacterial infections