quiz 13 Flashcards
Name 4 ways in which the spread of diseases can be reduced or prevented
Hand-washing,safer sex practices,vaccination and eradication of vectors
Why are placebos used in drugs trials
To avoid bias
What kind of microbe causes athletes foot?
A microscopic fungus
How does HIV lead to aids?
When the body’s immune system becomes so badly damaged it can no longer deal with other infections or cancers
What is a communicable disease?
A disease which can be passed on to others
How do some bacteria damage the cells in our body?
They release small chemicals called toxins
What is the aim of antriretroviral drugs?
To stop the virus from replicating inside cells
What are the symptoms of tobacco mosaic virus?
A distinctive mosaic pattern of discolouration on the leaves which affects the growth of the plant due to lack of photosynthesis
How do antibiotics work?
Preventing the bacteria cell wall from forming or preventing DNA from being replicated
What are the symptoms of malaria?
Fever,shaking and liver damage
Which drug was first made from yew trees?
Aspirin
Many modern drugs are based on chemicals found in plants or micro-organisms. True or false?
True
What are the painkillers used for?
Painkillers and other medicines are used to treat symptoms of disease but do not kill pathogens
What is an antibiotic?
A drug that kills bacteria(but not other types of pathogen)
What are antigens?
small protein molecules on the outside of pathogen cells
