3 Infection and Response - Pathogens Flashcards Preview

AQA Biology Paper 1 11-1A > 3 Infection and Response - Pathogens > Flashcards

Flashcards in 3 Infection and Response - Pathogens Deck (36)
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1

What are communicable diseases?

Diseases caused by pathogens that can be transmitted from one individual to another

2

Define 'pathogens'.

Microorganisms that cause diseases

3

Define 'health'.

State of physical and mental well-being

4

Suggest three factors that affect health.

Diet/Stress/life situations (eg. Hygiene)/pathogens/immune system

5

State the four types of pathogens.

Bacteria, viruses, protists, fungi

6

How do bacteria make you ill?

Reproduce rapidly and damage cells + Produce toxins

7

How do viruses make you ill?

Produce inside body cells, causing damage

8

How can pathogens be spread?

By air/droplet infection, direct contact, water

9

State one method to prevent the spread of disease.

Isolation; Maintain good hygiene; Destroy vectors; Vaccination

10

Name a viral disease that leads to blindness and brain damage.

Measles

11

How can measles spread?

Droplet infection

12

Name the pathogen that causes AIDS.

HIV (Human immunodefiency virus)

13

How can AIDS be spread?

Sexual contact; Exchange of bodily fluids (shared needles, blood transfusion)

14

How can AIDS be treated?

Antiretrovial drugs to control (not cure) it

15

Name a viral disease in plants.

Tobacco mosaic virus

16

Describe the appearance of a plant infected with tobacco mosaic virus.

Mosaic pattern of discoloration on leaves

17

How does tobacco mosaic virus affect the plants?

Destroy chloroplasts, so reduce photosynthesis

18

How can tobacco mosaic virus be spread?

Direct contact/Vectors

19

Viral diseases can be cured by antibiotics. True or false?

FALSE

20

Where can Salmonella bacteria be found?

Raw meat, chickens, eggs

21

State one symptom of Salmonella poisoning.

Fever/Abdominal cramps/diarrhoea/vomiting

22

Which pathogen causes gonorrhoea?

Bacteria

23

How does gonorrhoea spread?

Sexual contact

24

State a symptom of gonorrhoea.

Yellow/green discharge from penis/vagina; pain on urination

25

State a long-term effect of gonorrhoea.

Long-term pelvic pain, infertility, ectopic pregnancies

26

How can the spread of gonorrhoea be stopped?

Use condom; Limit sexual partners

27

How can we use Agrobacterium tumefaciens in plants?

They cause galls --> genetic manipulation

28

How can bacterial diseases be treated?

Antibiotics

29

Name a fungal disease in humans.

Athlete's foot

30

Which pathogen causes rose black spot?

Fungi