Bio - 15.1

Question 1

drugs - definition

Answer 1

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

Question 2

medicinal drugs - overview

Answer 2

• helps us stay healthy
• kills bacteria
• overtime becomes useless bec bacteria is resistance
• happens bec of natural selection

Question 3

antibiotic - definition

Answer 3

substance that is taken into the body that kills bacteria but does not affect human cells / viruses

Question 4

antibiotic - overview

Answer 4

• made from fungi
• kills bacteria without affecting body tissue
• doesn’t work on virus bec there isn’t a cell wall

Question 5

how antibiotic resistance happens

Answer 5

1. lots of germs, few are drug resistant
2. antibiotics kill bacteria, and some good cells as well
3. drug resistant bacteria are now allowed to take over
4. the drug resistant bacteria either shares / reproduces which causes more problems

Question 6

development of resistance

Answer 6

1. random mutations occur in the genes of individual bacterial cells
2. some mutations protect the bacterial cell from the effects of the antibiotic
3. bacteria without the mutation die / cannot reproduce when the antibiotic is present
4. resistant bacteria can reproduce with less competition from normal bacterial strains

Question 7

how to prevent msra

Answer 7

• avoid unnecessary use of antibiotic
• always complete full course