Biology 10A Flashcards
What can affect specialised exchange surfaces
Thin walls- short diffusion distance
Good blood supply- maintain concentration gradient
Large surface area
Definition of diffusion
Movement of particles from an area of high concentration to an area of low concentration (passive process)
What is osmosis
Movement of water molecules from a dilute solution to a concentrated solution across a partially permeable membrane (passive process)
Control variable in potato required practical
Type of potato , surface area of potato ,no skin , blot potato
What is active transport
Movement of particles from an area of low concentration to an area of high concentration
What does active transport require
Requires energy through a partially permeable membrane
Cells that use lots of active transport will have lots of?
Mitochondria to provide the energy for it
What is the chemical equation for respiration ?
C6H12o6 + 6o2 = 6co2 + 6h20
Word equation for respiration
Glucose + oxygen = carbon dioxide + water dioxide
