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GCSE AQA Biology > The spread of diseases > Flashcards

The spread of diseases Flashcards

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1
Q

What is Measles spread by?

A

Inhalation of droplets produced by infected people

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2
Q

What are the symptoms of Measles?

A
  • fever
  • Red skin rash
  • complications can be fatal
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3
Q

What is HIV Spread by?

A
  • Sexual contact
  • Enchange of body fluids (e.g Blood)
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4
Q

What are the symptoms of HIV?

A
  • Flu like symtoms at first
  • Virus attacks the bodies immmune system
  • Leads to vulnerability to AIDS
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5
Q

What is TMV (Tobaco mosaic virus) Spread by?

A
  • Direct contact of plants with infected plant material
  • Aminal and plant vectors
  • Soil
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6
Q

What are the symtoms of TMV?

A
  • Mosaic pattern of discolouration on the leaves
  • Reduces plants ability to photosynthesise
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7
Q

What is salmonella spread by?

A

Bacteria in or on food that is being eaten

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8
Q

How is Gonorrhoea spread?

A

Direct sexual contact (STD)

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9
Q

What are the symptoms of Salmonella?

A
  • Fever
  • Abdominal cramps
  • Vomitting
  • Diarhoea
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10
Q

What are the symptoms of gonorroea?

A
  • Thick yellow or green discharge
  • Pain when urinating
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11
Q

What are the ways of controlling Bacteria spread?

A
  • Higiene
  • Isolation
  • Controlling vectors
  • Vaccination
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12
Q

What is Rose Black Spot spread by?

A

Water and wind

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13
Q

What are the symptoms of Rose Black Spot?

A
  • Purple or black spots on leaves which turn yellow
  • Reduces plants ability to synthesise
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14
Q

How can you prevent Rose Black Spot?

A
  • Fungicides
  • Affected Leaves removed and destroyed
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15
Q

How is Malaria spread?

A

Mosquitos feed on the blood of people infected and spread it to new people

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16
Q

What are the symptoms of Malaria?

A
  • Recurrent episodes of fever
  • Can be fatal
17
Q

How can you treat and prevent Malaria?

A
  • Prevent mosquito breeding
  • Mosquito nets to prevent bites
  • Anti-malarial medicine
18
Q

What are the signs that a plant is diseased?

A
  • Stunted growth
  • Spots on leaves
  • Areas of rot or decay
  • Growths
  • Malformed stems or leaves
  • Discolouration
  • Pest infestation
19
Q

What are some examples of a physical barrier?

A
  • cellulose cell walls - provide a barrier to infection
  • Tough waxy cuticle on leaves
  • Bark on trees - a layer of dead cells that can fall off
20
Q

What are some examples of a chemical barrier?

A
  • Many plants produce anti-bacterial chemicals
  • Poison production stops animals eating plants
21
Q

What are some examples of mechanical adaptations?

A
  • Thorns and hairs stop animals eating plants
  • Leaves that droop or curl when touched scare herbivores or dislodge insects
  • Some plants mimic the appearance of unhealthy or poisonous plants to deter insects or herbivores
22
Q

What can Aphids do to plants?

A

Suck sap from the stems of plants, This results in
* Reduced rate of growth
* Wilting
* Discolouration of leaves

GCSE AQA Biology (14 decks)

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