Health and Disease Flashcards
What is a disease?
Conditions that can cause ill health
What does communicable mean?
A disease that can spread from person to person (infectious)
What can communicable diseases be caused by?
Viruses, bacteria, parasites and fungi
What are some examples of communicable diseases?
- Common cold
- Malaria
- Meningitis
What does non-communicable mean?
No spread between people
What are some examples of non-communicable diseases?
- Asthma
- Coronary heart disease
- Diabetes
- Cancer
What is the role of the immune system?
Do defend and destroy pathogens
How does having a poor immune system affect us?
Means our body won’t be able to defend us from communicable diseases as well as normally
What does HPV stand for?
Human Papillomavirus
What are micro organisms?
A group of tiny organisms including,
bacteria, fungi, protists and viruses
What are pathogens?
Microorganisms that can cause disease
What are some ways that pathogens can spread?
- Through air
- Contaminated food or water
- Direct contact
How can you stop pathogens from spreading?
- Being hygienic
- Kill the vectors (organisms that transport pathogen)
- Vaccination
- Isolate or quarantine
How do viruses spread?
- They get inside another cell and then use it’s own machinery to make copies of itself
- Once it’s ready it bursts the cell and goes to colonise more cells
How much smaller is a virus than an animal cell?
10,000 times smaller
Can viruses reproduce themselves?
No they can’t, instead they take over other cells and make copies of themselves using the cells machinery
What is the main reason why viruses make us feel ill?
Because they’re bursting our cells, which damages our bodies
How is measles spread?
When a person coughs or sneezes
What are symptoms of measles?
- Red rash across body
- Fever
How can HIV be spread?
- Sexual contact
- Exchanging bodily fluids
What does HIV stand for?
Human Immunodeficiency Virus
What does HIV affect?
Our immune system
What are symptoms of HIV?
- Fever
- Tiredness
- Aches
(Then feel better) - Immune system becomes very weak
This means that they are more susceptible to unusual infections and cancer
What are AIDS?
When the immune system can’t cope anymore
Are viruses living orgnaisms?
No
What is the treatment for HIV / AIDS
Antiretroviral drugs
Can bacteria reproduce by themselves?
Yes (often inside our bodies)
What is salmonella?
Food poisoning most commonly contracted by eating chicken that had the disease before it died
What are some symptoms of salmonella?
- Fever
- Stomach cramps
- Diarrhoea
- Vomiting
How is gonorrhoea spread?
Through sexual contact
What are symptoms of gonorrhoea?
- Paint when urinating
- Thick yellow or green discharge
What is the best prevention for gonorrhoea?
- Avoiding unsafe sex
- Barrier methods of contraception (condoms)
What used to be the treatment for gonorrhoea?
Penicillin, but lots of gonorrhoea strings have become resistant to penicillin and we have to use much rarer types of antibiotics to treat gonorrhoea
What does multicellular mean?
Multiple cells