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Active Transport – Transport Across Cell Membranes

by Georgina Cornwall, PhD
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    About the Lecture

    The lecture Active Transport – Transport Across Cell Membranes by Georgina Cornwall, PhD is from the course Cellular Structure.


    Included Quiz Questions

    1. …the molecules against their concentration gradients by using energy
    2. …the water molecules against a concentration gradient by using energy
    3. …the water molecules down the concentration gradient by using energy
    4. …the molecules down the concentration gradient by using energy
    5. …the molecules against their concentration gradient without using any energy
    1. Na+/Glucose Cotransporter ---- Primary active transport
    2. Symport membrane transport ---- Na+/ Glucose Cotransporter
    3. Antiport ---- Na+/K+ Pump
    4. Uniporter ---- Moves a single substance in a single direction
    5. Active transport across membrane ---- Utilize energy
    1. To facilitate the active transport of glucose across the cell membrane via Na+/Glucose cotransporter
    2. To flavor the energy drinks
    3. To facilitate the quick breakdown of the glucose
    4. To promote the rapid release of energy via enzymatic breakdown of glucose
    5. To slow down the leakage of K⁺ ions from the exterior to the interior of the cell
    1. Na+/Glucose cotransporter is an example of the primary active transport system for nutrient absorption in the intestine
    2. Na⁺/Glucose cotransporter is a symport membrane transport system
    3. Na⁺/Glucose symporter utilizes the energy driven from a downhill sodium ion gradient
    4. Na+/Glucose pump is a secondary active transport system as it is dependent on the functioning of the Na+/K+ pump
    5. Na+/Glucose cotransporter pumps in the glucose and Na+ ions from external fluid to the cytoplasm of the cell
    1. It is a secondary active transport mechanism that transports, 3 sodium atoms out of the cell for every 2 potassium atoms in pumps in
    2. It is a primary active transport mechanism that transports, 3 sodium atoms out of the cell for every 2 potassium atoms in pumps in
    3. Creates both an electrical and chemical gradient across the cell membrane
    4. Can be used to drive secondary active transport, in which the gradient generated is used to transport another molecule against its concentration.

    Author of lecture Active Transport – Transport Across Cell Membranes

     Georgina Cornwall, PhD

    Georgina Cornwall, PhD


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