Blood Glucose Homeostasis Flashcards
What is hypoglycemia and hyperglycemia?
Low and high sugar
True or false: blood sugar/ glucose regulates many pathways in our body
True
Why do we want glucose to be in a normal range in our body?
It keeps our body in homeostasis. Glucose provides energy to our cells.
Why do they look for sugar concentration at doctors office?
To see if you’re at risk for diabetes.
What is the normal glucose concentration in blood? (In mmol )
5 mmol
Why is glucose in the blood so important to think about?
- muscles use glucose during exercise
- when glucose gets to cells, it produces ATP
- our brains cannot function without glucose.
- glucose is critical for muscle and the muscle uses a ton of it.
How do we get glucose in our bloodstream?
We consume carbohydrates, and if we don’t, our liver can make glucose from protein
What muscle is constantly burning glucose?
The brain. it doesn’t burn fat or protein.
What will happen to your brain with no glucose?
Groggy and tired first. Then we get weak, loss of consciousness and then death.
What is the brains emergency fuel?
Ketones. But prefers glucose. Won’t consume anything else.
Every muscle except the brain requires what hormone to get to the muscle cells?
Insulin.
What does a PET scan do?
Uses isotopes to measure glucose uptake into the cell.
Where does the most glucose uptake occur in the body during exercise?
The part you are using most (ex. Sprinters will be legs).
What is the amount of glucose in the blood stream before a meal vs. After a meal?
Before: 4 grams. After: 7.3 grams.
How many litres of blood does the average adult have?
4.5L of blood
