Download 7.7 Strategies – Questions and answers Q1. Bk Ch7 S7.7 Q1 a

7.7 Strategies – Questions and answers
Q1.
Bk Ch7 S7.7 Q1
a
b
Describe the role of the Australian Quarantine and Inspection Service.
Explain how quarantine laws help control the spread of plant and animal diseases in Australia.
A1.
Bk Ch7 S7.7 A1
a
b
The role of the Australian Quarantine and Inspection Service (AQIS) is to protect Australian
plants and animals from exotic diseases that might be introduced from other countries.
Quarantine laws ensure that every person, animal, plant and object coming into Australia is
checked and/or quarantined to keep our country free from exotic diseases. AQIS inspectors are on
duty 24 hours a day at every main entry point for ships and aircraft in Australia. People as well as
cargo and mail are checked as they arrive. Imported animals are kept in quarantine for a period of
time before being released. Plant seeds are carefully checked. Goods such as cars and machinery
are checked and cleaned if necessary to ensure they are free of foreign soil and plant matter that
might harbour diseases.
Q2.
Bk Ch7 S7.7 Q2
Describe one example each of how public health programs help to control and prevent disease by
targeting the:
a
pathogen
b
host
c
environment.
A2.
Bk Ch7 S7.7 A2
a
b
c
Targeting the pathogen is a way of ensuring that infectious diseases do not occur in the first place.
Sterilisation procedures and strict guidelines in place for health workers aim to reduce the spread
of blood-borne infections such as HIV and hepatitis. Regulations requiring the isolation of
patients with certain diseases prevent the spread of those diseases. The introduction of laws
relating to notifiable diseases means appropriate authorities need to be notified in the case of
particular infectious diseases and those patients must also be isolated.
Targeting the host can also prevent or reduce the incidence of certain diseases. For example,
education campaigns aimed at increasing community awareness about the effect of smoking on
health may encourage smokers to quit; information about routine immunisation increases the
likelihood of children being immunised against potentially serious diseases.
Attention to the environment by government bodies increases safety standards for the community,
thereby reducing the risk of disease. For example, regulations about food handling along with
hygiene inspections for food outlets reduces the chances of food spoilage and therefore related ill
health; water treatment plants for domestic water supplies reduce the risk of pathogenic organisms
making their way into homes.
Q3.
Bk Ch7 S7.7 Q3
Explain how public education campaigns can be beneficial to the health of the community at large. Use
a specific example in your answer.
A3.
Bk Ch7 S7.7 A3
Public education campaigns can be beneficial to the health of the community at large because they can
alter the behaviour of members of the community in ways that improve their health. For example,
education campaigns targeting women and encouraging them to have regular pap tests for the early
diagnosis of cervical cancer have led to a decrease in the incidence of the disease in New South Wales.
7.7 Strategies QA
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Q4.
Bk Ch7 S7.7 Q4
Outline the advantages and disadvantages of using pesticides on food crops.
A4.
Bk Ch7 S7.7 A4
The use of pesticides on food crops is an effective way of controlling crop pests, so it reduces the
damage to crops and ensures a maximum yield. But target species can develop a resistance to the
pesticide that is used. When this happens the pesticide becomes less effective, so more concentrated
preparations need to be applied or new ones need to be developed.
Q5.
Bk Ch7 S7.7 Q5
Why are some plants and animals that are used for foods genetically engineered?
A5.
Bk Ch7 S7.7 A5
Some plants and animals that are used for foods are genetically engineered because by doing so the
crop yield or health of livestock is improved and this means that more food will be available for
humans.
7.7 Strategies QA
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