Answer:
Insulin Basics: How Insulin Helps Control Blood Glucose Levels. Insulin and glucagon are hormones secreted by islet cells within the pancreas. They are both secreted in response to blood sugar levels, but in opposite fashion! Insulin is normally secreted by the beta cells (a type of islet cell) of the pancreas.
They allow your me to look past the tissue of your mouth, such as your gums, and into the deeper areas of your teeth and jaw bone. That way I can look for signs of oral health issues that may be invisible with a visual examination alone.
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Answer:
Middle zone , outer zone & inner zone.