What occurs during the postabsorptive state?

What occurs during the postabsorptive state?

The postabsorptive state, or the fasting state, occurs when the food has been digested, absorbed, and stored. Glucose levels in the blood begin to drop as it is absorbed and used by the cells. In response to the decrease in glucose, insulin levels also drop. Glycogen and triglyceride storage slows.

What does the liver do in absorptive state?

During the absorptive state, anabolic processes use glucose in a variety of ways. In the liver, glucose is converted to glycogen or fat, which store energy for future use. Fat is also stored in adipose tissue and glycogen in muscle tissue.

Which of the following is secreted during the postabsorptive state?

glucagon
During the fasting or postabsorptive state, glucagon is secreted.

What is the Postabsorptive period?

The postabsorptive state consists of a 6-h period that follows the postprandial period. During this time interval, glucose concentrations remain within a normal range in nondiabetic individuals through the breakdown of the glycogen (glycogenolysis) stored during the postprandial period.

Which of the following is not a postabsorptive state reaction?

The correct answer is b). Lipogenesis does not occur during the postabsorptive state.

What is the primary hormone of the postabsorptive state?

insulin
(4). Hormones: Postabsorptive state is largely caused by lack of insulin; also utilizes glucagon, but stress hormones (cortisol and epinephrine) can fill in for glucagon. Glucagon mainly affects liver.

What is the difference between absorptive and Postabsorptive States?

The key difference between absorptive and postabsorptive state is that absorptive state is the state that digests foods and absorbs nutrients into our bloodstream while the postabsorptive state is the state in which the nutrient absorption does not occur, and the body relies on the energy reserves for energy.

How is the postabsorptive state controlled and initiated?

The postabsorptive state is controlled by the interaction of the sympathetic nervous system and several hormones, especially glucagon. The trigger for initiating postabsorptive events is damping of insulin release, which occurs as blood glucose levels begin to drop.

Which of the following molecules Cannot be used for gluconeogenesis?

Fatty acids and ketogenic amino acids cannot be used to synthesize glucose. The transition reaction is a one-way reaction, meaning that acetyl-CoA cannot be converted back to pyruvate. As a result, fatty acids can’t be used to synthesize glucose, because beta-oxidation produces acetyl-CoA.

What happens during the postabsorptive state quizlet?

sustains a normal blood glucose level is the major challenge during the postabsorptive state. when blood glucose levels drop after a meal, the hormones glucagon and cortisol are released. the breakdown of lipids, stimulated by epinephrine and norepinephrine also result in increased glucose production.

How is the postabsorptive state controlled?

What happens to glycogen in The postabsorptive state?

Figure 24.5.2 – Postabsorptive State: During the postabsorptive state, the body must rely on stored glycogen for energy, breaking down glycogen in the cells and releasing it to cell (muscle) or the body (liver). When the body is deprived of nourishment for an extended period of time, it goes into “survival mode.”

What happens when glucagon is released from the liver?

Glucagon acts upon the liver cells, where it inhibits the synthesis of glycogen and stimulates the breakdown of stored glycogen back into glucose. This glucose is released from the liver to be used by the peripheral tissues and the brain. As a result, blood glucose levels begin to rise.

How are glucose and tag released from the liver?

In the fasted state or during exercise, fuel substrates (e.g. glucose and TAG) are released from the liver into the circulation and metabolized by muscle, adipose tissue, and other extrahepatic tissues. Adipose tissue produces and releases nonesterified fatty acids (NEFAs) and glycerol via lipolysis.

How are glycolysis and gluconeogenesis regulated in the liver?

Gluconeogenesis is regulated by gluconeogenic enzymes. Gluconeogenic enzymes are regulated by posttranslational modifications and/or allosteric regulation. Most liver enzymes, which regulate glycolysis, gluconeogenesis, the TCA cycle, the urea cycle, and fatty acid and glycogen metabolism, are acetylated (292).