Ions, vitamins and minerals Flashcards
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What is diffusion?
What affects the rate of diffusion?
What is meant by the terms hpotonic, isotonic and hypertonic solution?
What are the 2 types of transports for solutes to cross from the lumen, across the epithelium, into the bllood?
What are the 3 ways solutes can cross membranes?
What are the two types of transport proteins involved in facilitated diffusion?
Which allow faster transport - channel or carrier proteins?
What is difference between a carrier and channel protein?
Carrier protein
Channel protein = aqueous pore that opens up
What are ion channels?
Aqueous channels
What are the different stimuli that can open channels?
Voltage gated - arrival of an action potential
ligand gated - in response to a molecule?
What are the 3 types of carrier mediated transport?
Uniport
Symport
Antiport
What are the 2 types of active transport? What are some examples of each?
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Summarise the diagram below:
idek what i missed
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Absorption of carbohydrates??
How are water and electrolytes reabsorbed in the GI tract?
Approximately how many L of water is absorbed a day in the small and large bowels?
Absorption of H2O powered by the absorption of ions
How is the osmosis gradient for the absorption of water formed?
Na+ transported from lumen into electrolyte
Makes something hypotonic
useless slides?
More waffle on osmosis gradient
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