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Transport in cells - Coggle Diagram
Transport in cells
Active transport
requires energy from respiration
movement of particles from a region of low conc to high conc
up a concentration gradient
eg. mineral ions in plant roots
essential for healthy growth
Exchange surfaces
high SA
so more of a substance can diffuse at once
good transport system / ventilation - blood
maintain conc gradient
thin walls
short diffusion distance
examples
Intestines
villi & microvilli
high SA
Good network of capillaries in villi
Blood moves substances away from intestines
very small villi
short diffusion distance from lumen to blood stream
Fish gills
lamellae - folds for large SA
lamellae very thin - short diffusion distance
counter-current (not needed for test)
Lungs
alveoli - air sacs - huge SA
alveoli & capillaries only 1 cell thick - short diffusion distance
excellent network of capillaries around alveoli
leaves in plants
flat - large SA
very thin - short diffustion distance
stomata - open & close to allow CO2 into and O2 out of leaf
Roots in plants
root hair cell - large SA
short distance from root hair cell to vascular bundle
Lots of mitochondria - for active transport
Osmosis
down a concentration gradient
movement of water from high conc to low conc
across a partially permeable membrane
Diffusion
NET movement of particles from an area of HIGH CONC to an area of LOW CONC DOWN a conentration gradient
into of out of cells