Cell Biology
What is the function of the cell membrane?
Controls what enters and leaves the cell
Put these in order from smallest to largest....
Organ, organism, tissue, cell, organ system
Cell, tissue, organ, organ system, organism
What is the charge and mass of a proton?
Charge +1, mass 1
What type of elements form covalent bonds?
Non-metal elements
What is the store of energy in hot objects?
Thermal
What is active transport?
The movement of particles against the concentration gradient (low to high) - using energy
What organ system do alveoli belong to?
Respiratory system
Who discovered neutrons?
James Chadwick
How many electrons can bromine gain in an ionic bond?
1
What is the difference between renewable and non-renewable energy resources?
Renewable resources can be replenished, non-renewable resources are finite
State three organelles you would find in a plant cell but not in an animal cell.
Cell wall, vacuole, chloroplast
Which vessel carries deoxygenated blood to the lungs?
Pulmonary artery
Put the subatomic particles in order of discovery.
Electron, proton, neutron
How many covalent bond does each carbon atom form in a diamond?
4
Define specific heat capacity.
The energy required to raise the temperature by 1oC for 1kg of a substance.
What is the correct equation for calculating magnification?
Magnification = image size/real size
State three ways to treat coronary heart disease.
Statins (medication), stent, lifestyle changes e.g. eat less fat, more exercise
What do we call group 1,7 and 0 elements?
Group 1 - alkali metals
Group 7 - halogens
Group 0 - noble gases
What is an allotrope?
Different versions of the same element in the same state.
How do you calculate efficiency?
Efficiency = (useful ouput/total input) x 100
What is the difference between magnification and resolution?
Magnification is how enlarged/zoomed in the image is, resolution is the clarity of the image
What is the difference between embroynic and adult stem cells?
Embryonic stem cells can differentiate into any cell, adult stem cells are limited, they can only differentiate into a few cells
Why are metals good conductors of electricity and heat?
Delocalised electrons.
How can ionic compounds be made to conduct electricty?
Molten, or aqueous solution
Elastic potential store increases
Kinetic store increases
Chemical store decreases