General Science Flashcards
Measles is a viral disease, what symptoms does it show?
Red skied rash and signs of fever
Name two serious infections (in the lungs and brain) which can be caused by measles
Pneumonia (lungs) and encephalitis (brain)
Which one type of pathogen can be treated with antibiotics?
Bacteria
What are protists?
A type of pathogen which is a single cell eukaryote
What is a vector?
An insect which carries the protist (parasite)
Where do parasites (protists) live?
On or inside the organism
What is the name of the process which involves white blood cells consuming and digesting a foreign cell?
Phagocytosis
How is the trachea and the bronchi adapted to defend against pathogens?
They create mucus to trap the pathogens and then waft the mucus to the throat with cilia (hair like structure)where it can swallowed
What has made gonorrhoea harder to treat?
A strain of resistant bacteria which can resist antibiotics (caused by the over use of antibiotics)
What steps can be taken to prevent the spread of disease?
Being hygienic, destroying vectors, isolating infected individuals, vaccination
What is the radius of an atom?
1 × 10^-10 (0.1 nanometers)
What is the relative mass and charge if the proton, neutron and electron?
Relative mass - proton: 1, neutron: 1, electron: very small
Charge - proton: +1, neutron: 0, electron: -1
How do you find the number of neutrons from an nuclear symbol?
Subtract the atomic number from the mass number
How do you find the number protons from the nuclear symbol?
Look at the atomic number
How do you find the total number of protons and neutrons from nuclear symbol?
Look at the mass number
