diabetestalk.net

Where Is Glucose Stored In The Cell?

Share on facebook

Glucose Flashcards | Quizlet

In the cytosol of many tissues, eg. liver, muscle, kidney. Glucose attracts water, glycogen doesn't attract AS MUCH water. Glycogen storage that can be accessed for other tissues? Storage in the liver and kidney. (Muscle cell glycogen cannot be used for other cells). Liver v Muscle amount of glycogen storage Liver up to 10%, muscles 1-2%. This is due to space limits in cardiac muscles. Do glycogen synthesis and degradation occur at the same time? Describe structure of glycogen, and 2 bonds - Is similar to starch, but can pack more densely (space efficency). - Protein is middle is glycogenin = has two binding ends that allow the glucose molecules to attach to it. of which end if glucose added and taken away from the glycogen polymer the Non-reducing end. (reducing end is bound to the glycogenin) 1) Glucose enter throuh cell membrane through glucose transporter. 2) Hexokinase/Glucokinase (liver and kidney only) phosphorlyate the glucose (ATP-->ADP) -->Glucose 6-phosphate so glucose can't go back through the transporter. 3) Glucose 6-phosphate is converted to Glucose 1-phosphate 5) UDPG is added to glycogenin by Glycogen synthase Glucose release mediated by light or hormones (eg. adr Continue reading >>

Share on facebook

Popular Questions

  1. MinaGhobrial

    1. The problem statement, all variables and given/known data
    Why does the human body spend two high energy phosphate bonds to store glucose as glycogen in muscle and liver, and not just as glucose? What is the advantage in using energy to polymerize the glucose molecule?
    2. Relevant equations
    3. The attempt at a solution
    Why is glucose stored as glycogen in muscle and liver, and not just as glucose?
    Below are some theories I proposed please correct me if I am wrong.
    Glycogen is insoluble thus, storing it as glycogen will not upset the osmotic pressure rather than glucose which is soluble in water and if it is stored as glucose it will disturb the osmotic pressure(hypertonic) that will cause the cell to lyse.
    Glycogen is a polymerized form of sugar with alpha 1,4 and alpha 1,6 that enables that can be degraded efficiently rather than free floating glucose. with that in mind wouldn't it be as efficient if glucose is stored in the liver and shipped to the desired destination if it is possible to store it in the cell without disturbing the osmotic pressure?
    Glucose is unstable and forms a ring which maturate with a predominance of beta anomers which is favored structure but also, the cell would have a alpha glucose that is unable to undergo glycolysis and it wouldn't be accessible when it is needed for breakdown.

  2. SasQuach

    MinaGhobrial said: ↑

    1. The problem statement, all variables and given/known data
    Why does the human body spend two high energy phosphate bonds to store glucose as glycogen in muscle and liver, and not just as glucose? What is the advantage in using energy to polymerize the glucose molecule?
    2. Relevant equations
    3. The attempt at a solution
    Why is glucose stored as glycogen in muscle and liver, and not just as glucose?
    Below are some theories I proposed please correct me if I am wrong.
    Glycogen is insoluble thus, storing it as glycogen will not upset the osmotic pressure rather than glucose which is soluble in water and if it is stored as glucose it will disturb the osmotic pressure(hypertonic) that will cause the cell to lyse. This is the primary reason.

    Glycogen is a polymerized form of sugar with alpha 1,4 and alpha 1,6 that enables that can be degraded efficiently rather than free floating glucose. with that in mind wouldn't it be as efficient if glucose is stored in the liver and shipped to the desired destination if it is possible to store it in the cell without disturbing the osmotic pressure?
    Glucose is unstable and forms a ring which maturate with a predominance of beta anomers which is favored structure but also, the cell would have an alpha glucose that is unable to undergo glycolysis and it wouldn't be accessible when it is needed for breakdown. Unstable is a relative term but Glucose is pretty damn stable. You can store glucose for years on your shelf without any degradation.

  3. -> Continue reading
read more close

Related Articles

Popular Articles

More in ketosis