Magnification
Image size dived by actual size
Image size
Actual size times magnification
Actual size
Image size divided by magnification
I millimetre (mm)
1000 micrometers (um)
1 micrometer (um)
1000 nanometers (nm)
Alveoli
Site of gas exchange in the lungs
What are 3 substances that go in and out of a cell
Water
Oxygen
Carbon dioxide
Hypertonic
higher concentration of solute
Hypotonic
Lower concentration of solute
Active transport
the process of moving molecules across a partially permeable membrane from a region of lower concentration to a region of higher concentration, against the concentration gradient requiring energy
What does a plant cell have that an animal cell doesn’t (3)
Vacuole, chloroplast and cell wall
Diffusion concentration gradient
High to low
Osmosis concentration gradient
High to low
Active transport gradient
Low to high
Diffusion
Is the movement of particles from a high concentration to low concentration, form of passive transport as occurs naturally not needing any extra energy.
Which of the three transports doesn’t have a partially permeable membrane?
Diffusion
Osmosis
Is when water particles move from an area of high concentration to an area of low concentration across a gradient though a partially permeable membrane, it doesn’t require energy
Cell membrane
Controls the transport of substances into the cell
Mitochondria
Where energy is released
Ribosomes
Where proteins are made
Cell wall
To strengthen and support the cell
Nucleus
Contains all the cells DNA and controls what the cell does
On a microscope if the image is blurry what should you do?
Adjust the focus knob
1 cm is ? mm
10 mm
