Science-Biology
active transport
movement of molecules from a place of low to high concentration requiring energy
diffusion
where substances move from high to low concentration without requiring energy from the cell
cell membrane
the place where active transport and diffusion take place around the cytoplasm
mitochondria
responsible for cellular respiration and providing the energy for active transport
root hair cells
long hair like things on roots to collect water and mineral ions
chloroplasts
the green pigment used for absorbing light energy for photosynthesis
osmosis
net movement of water molecules across partiall permeable membrane from higher to lower water concentration
solute
molecules like sugars or salts dissolved in water
pure water
water with no solute
light microscope
small easy to use cheap but limited zoom
elctron microscope
large expensive hard to use but has a very clear zoom and view
specialized cells
cells with specific roles and structures
stem cells
cells that can repeatedly divide by mitosis and turn into specialised cells
mitosis
the process of cell division resulting in two identical daughter cells
phloem cells
specialised plant cells involved in transporting sugars produced by photosynthesis
xylem cells
specialised plant cells involved in transporting water and minerals
magnification equation
magnification =image size/object size
nanometer
smallest unit of length 1000x smaller than a micrometer
micrometer
1000x smaller than a millimeter
millimeter
1000th smaller than a meter
organisms
living things
cells
the building blocks of life
eukaryotic cell
cell type with a true nucleus and membrane
prokaryotic cell
cell type without a true nucleus or membrane
pathogens
organisms that can cause disease
when a stem cell specialises to make a new gill this process is known ad
differentiation
to grow a new gill the stem cells multiply by
mitosis