Drugs

Question 1

What are drugs?

Answer 1

These are substances taken in the body to alter its chemical reactions

Question 2

List 2 types of drugs

Answer 2

-medicinal drugs which are prescribed by doctors
-non medicinal drugs which are taken in for recreational purposes

Question 3

Examples of non-medicinal drugs

Answer 3

-Stimulants such as ecstasy, cocaine & amphetamines give a short lived feeling of well-being
-Depressants such as cocaine & heroin slow response and coordination in the body
-Heroin gives a euphoric feeling

Question 4

What happens when someone is addicted to drugs?

Answer 4

If the body relies on drugs a person becomes addicted and wants a higher dosage regularly for the same effect

Question 5

Why does the body require more drug dosage?

Answer 5

This is because the body’s metabolism becomes used to the drug. The liver secretes enzymes to kill the drug so that the dose has to increase to have thesameeffect for the first time.

Question 6

What are antibiotics?

Answer 6

Chemicals made from micro organisms (fungi&bacteria) and are used to kill pathogens

Question 7

Penicillin

Answer 7

This is the first antibiotic discovered and produced by fungi in a fermenter

Question 8

How does penicillin work?

Answer 8

Inhibits cell wall formation in bacteria and destroy the cell wall causing contents to leak.
It also prevents substances from moving in and out the cell membrane.

Question 9

Why can’t antibiotics treat viral-diseases?

Answer 9

-viruses have hard protein coats and cannot be destroyed
-viruses are acellular, thus cannot carry out important metabolism without the cell host.
- Antibiotics only target a specific bacterial structure but not human cells

Question 10

Explain how Antibiotic Resistant Bacteria form

Answer 10

Misuse or overuse because of doctors

Question 11

What do you call the overuse of antibiotics?

Answer 11

Menicillin Resistant Staphylococcus