Drugs + NS Flashcards
When does evolution occur?
When natural selection happens again and again
What are chromosomes?
Long strands of genetic information in the nucleus of cells
Explain the meaning of the word ‘drug’
Any chemical substance that changes the way in which the body works
Give an example of one medical drug
Morphine
What is the effect of a painkiller?
Blocks some nerve impulses so we feel less pain
Name the type of the drug which has the effect of increasing speed of reactions
Stimulant
Name the type of drug which has the effect slows down the activity of neurones in the brain
Depressants
Give an example for each of these three types of drugs:
Painkiller
Stimulant
Depressants
Morphine
Caffeine
Alcohol
Name one reason why Alcohol is such a popular drug (1)
It makes people happier and is addictive
Describe the short term and long term effects of alcohol (6)
Short term: Short breathing, blurred vision, vomiting
Long term: Brain damage, cirrhosis of the liver, blood clots in brain
What is the correct term for any organism that causes a disease?
Pathogen
When organisms of the same species breed they do what?
Fertile offspring
When organisms or different species breed they can produce fertile offspring called
Hybrids
What is carbon monoxide?
A gas that is poisonous because it reduces the amount of oxygen that red blood cells can carry.
What is cirrhosis of the liver?
Where the normal tissue is destroyed so the liver cannot function properly. This can lead to death
