BIOLOGY Practical 3,7,8,9 Flashcards
independent varible
the varible that you change in an experiment
dependent varible
the varible that you measure as you collect results
osmosis
the net movement of water molecules down the concentration gradient through a particaly permeable membrane
diffusion
net movement of particles down the concentration gradient as a result of random movement
active transport
movement of molecules from a lower concentration to a higher concentration by using energy
xylem
a plant tissue made up of dead, empty cells joined end to end. transports water and mineral ions to help support the plant
phloem
a plant tissue made up of living cells joined end to end, transports substances made by the plant like sucrose and amino acids
lignin
hard strong waterproof substance forms walls of xylem cells
what part does water vapor leave the plant from
Stoma
what are the befits of humans having a double circulatory
it pressurizes the blood more than a single circulatory sytem meaning it can travel farther
water potential gradient
a difference in water potentail between 2 areas
transpiration
loss of water vapor from leaves
transpiration pull
a force produced by the loss of water vapor from a leaf,which reduces the pressure at the top of xylem vessels
pulmonary veins
the veins that carry oxygenated blood from the lungs to the left atreum of the heart
atria
the thin-walled chambers at the top of the heart wich receive blood
