Glucose Regulation

Got a few questions regarding blood sugar regulation for anyone who can help me out.

  1. When are glucoreceptors located in the body? I’ve read around and I’ve got mixed reports, such as the liver, stomach, small intestine, hypothalamus. Are all these correct?

  2. If there are receptors in the hypothalamus, is this also the control center that sets the appropriate blood glucose level and decides whether to decrease blood glucose or not?

  3. My essay format isn’t great. Is it necessary to include references for every piece of information you inlude, even if you collect information from various books and sources, where references aren’t provided?

Many thanks.