How does glucose function work

[Samurai Drive]

Hey,

Years of peating and I still couldn't explain how glucose process works and when stress kicks in to cover low glucose.

So... liver glycogen feeds blood glucose until emptied, around 70 grams sugar. Then cortisol and adrenaline is releases to break down protien for glucose and free fatty acids released???

What a bout muscel glycogen, would we not use this first before stress kicks in??

If anyone could post there picture of what happens, would be grateful.

 

[qminati]

when your blood sugar from your last meal begins to drop and you begin to run out of your glycogen stores in your liver, your cells send out a message for help, adrenaline answers the message by releasing fats from storage to be used as energy. This process is stressful and not as efficient for energy production. The longer this occurs the more stressed your body becomes and cortisol needs to take over by converting protein from your muscles and organs and feeding your cells with all the sugar it needs.

 

[Jonk]

"
A lowered metabolic rate and energy production is a common feature of aging and most degenerative diseases. From the beginning of an animal's life, sugars are the primary source of energy, and with maturation and aging there is a shift toward replacing sugar oxidation with fat oxidation. Old people are able to metabolize fat at the same rate as younger people, but their overall metabolic rate is lower, because they are unable to oxidize sugar at the same high rate as young people. Fat people have a similar selectively reduced ability to oxidize sugar.

Stress and starvation lead to a relative reliance on the fats stored in the tissues, and the mobilization of these as circulating free fatty acids contributes to a slowing of metabolism and a shift away from the use of glucose for energy. This is adaptive in the short term, since relatively little glucose is stored in the tissues (as glycogen), and the proteins making up the body would be rapidly consumed for energy, if it were not for the reduced energy demands resulting from the effects of the free fatty acids.

One of the points at which fatty acids suppress the use of glucose is at the point at which it is converted into fructose, in the process of glycolysis. When fructose is available, it can by-pass this barrier to the use of glucose, and continue to provide pyruvic acid for continuing oxidative metabolism, and if the mitochondria themselves aren't providing sufficient energy, it can leave the cell as lactate, allowing continuing glycolytic energy production. In the brain, this can sustain life in an emergency."

Glucose and sucrose for diabetes.

Since the first doctor noticed, hundreds of years ago, that the urine of a diabetic patient tasted sweet, it has been common to call the condition the sugar disease, or sugar diabetes, and since nothing was known about physiological chemistry, it was commonly believed that eating too much sugar...

raypeat.com

 

[Samurai Drive]

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[Samurai Drive]

@qminati @Jonk
Yeah thanks guys but that doesn't address my confusion
Why would we go straight to fats and break down protien once our liver glycogen runs out and not then access the muscle glycogen which is a good 500 grams of glucose.

This matters as then we have a large resource of glucose before entering ffa and protien breakdown which is to be avoided.