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  • IMAT 2011 Q58 Biology

  • Nicolas Sanchez

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    June 21, 2021 at 12:35 am
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    Which answer correctly identifies roles of the brain and the pancreas in the normal physiological regulation of the concentration of glucose in the blood?

  • Ari Horesh

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    June 22, 2021 at 11:05 am
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    Tricky question. But if you have study the following material, you sure know that The pancreas maintains the body’s blood glucose (sugar) balance. Primary hormones of the pancreas include insulin and glucagon, and both regulate blood glucose. The Brain does not have a rule in this type of pathway.

    The Answer Is D

    “…..A small proportion (1-2 percent) of the pancreas is made up of other types of cells called islets of Langerhans. These cells sit in tiny groups, like small islands, scattered throughout the tissue of the pancreas. The islets of Langerhans contain alpha cells which secrete glucagon and beta cells which secrete insulin.

    Insulin and glucagon are hormones that work to regulate the level of sugar (glucose) in the body to keep it within a healthy range. Unlike the acinar cells, the islets of Langerhans do not have ducts and secrete insulin and glucagon directly into the bloodstream.

    Depending on what you’ve eaten, how much exercise your muscles are doing, and how active your body cells are, the amount of glucose in your bloodstream and cells varies. These 2 hormones have the job of keeping tight control of the amount of glucose in your blood so that it doesn’t rise or fall outside of healthy limits…..” (mydr.com.au)

    • Bobby Sundstrom

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      August 5, 2021 at 2:08 pm
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      I’m a little confused about this question as well. Your explanation talks about the fact that the pancreas secretes the hormones that regulate blood glucose concentration. But how does the pancreas DETECT changes in blood glucose concentration?

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