Chapter 15: Drugs

Question 1

Define drug:

Answer 1

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

Question 2

How do antibiotics work?

Answer 2

they target bacterial infections by disrupting the formation of a cell wall and so bacteria can’t reproduce, this is also why they don’t affect human cells and viruses.

Question 3

What happens when bacteria is resistant to antibiotics?

Answer 3

you get superbugs that increase rapidly

eg. MRSA (methicillin- resistant staphylococcus aureus)

Question 4

What are some affects of excessive alcohol and heroin abuse?

Answer 4

• longer reaction time
• less self-control
• addiction with powerful withdrawal symptoms
• crime
• powerful depressants
• long-term use causes liver damage
• can cause infection (heroin needles)

Question 5

Causes of tobacco smoking:

Answer 5

• chronic obstructive pulmonary disease (emphysema causes weakened alveoli walls and chronic bronchitis which causes excess mucus to be produced.)
• coronary heart disease
• lung cancer