Co- transport 0.0 / 5 ? BiologyCellular processesASAQA Created by: aarafa11Created on: 19-01-18 10:39 How is the rate of movement increased in the ileum Microvilli icrease the surface area 1 of 19 What is a sodium - potassion pump eitheir amino acid/ glucose are drawn innto dell along with Na+, that has been actively transported out by the Na-K pump 2 of 19 How is the rate of movement increased increasing the concentration gradient | increasing the surface area | increasing the DENSITY of protein channels 3 of 19 Why is co transport used to described the transport of co- transport glucose & Na+ ions move into the cell coupled together 4 of 19 What is passive movement in co-transport Sodium ions and glucose move INTO of the epithelial cell 5 of 19 What is active movement in co-transport Sodium ions are moved out of the epithelial cell 6 of 19 Whats the 1st step in co-transport Na+ are ACTIVELY TRANSPORTED out of epithelial cell into the blood using CARRIER PROTEIN | maintains a high conc of Na+ in the lumen of intrstine 7 of 19 Whats the 2nd step in co-transport Na+ is FACILIATED DIFFUSED into the epithilial cell down the conc grad by a different carrier protein 8 of 19 Whats the 3rd step in co-transport Simultaneously, AA. glucose is carried into the cell with the Na+ 9 of 19 Whats the 4th step in co-transport Glucose/ AA is FACILIATED DUFFUSED into the blood plasma using a different carrier protein 10 of 19 What causes diarrhoea Damage to the epithelial cell lining in intestine | loss of microvilli due to toxins | excessive secreteion of water due to toxins 11 of 19 Why is drinking water inaffective for diarrhoea water is not absorbed int he intestines --> water is lost from the cells | it doesnt replace the electrolytes that are being lost 12 of 19 What does a rehydration solution do finds an alternative pathway for Na+ ions to be absorbes --> using different carrier proteins 13 of 19 What is needed in a rehydration solution water, soduim ions, glucose, potassium and other elctrolytes 14 of 19 Why is WATER needed in the rehydration solution to rehydrate the tissues 15 of 19 Why is Na+ needed in the rehydration solution replace the Na+ that were lost from the epithelium | optimise use of the alternative sodium-glucose carrier protein 16 of 19 Why is GLUCOSE needed in the rehydration solution to stimulate the uptake of Na+ from the intestine | provide energy 17 of 19 Why is K+ needed in the rehydration solution replace the K+ | stimulate appetite 18 of 19 Why is OTHER ELECTROLYES needed in the rehydration solution Cl- and CITRATE IONS | help preven electrolyte imbalance and metabolic acidosis 19 of 19
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