[24] Fasting and Thermogenesis

Question 1

What is the relationship between fasting and thermogenesis?

Answer 1

Fasting triggers adaptive thermogenesis to conserve energy.

Question 2

What is adaptive thermogenesis?

Answer 2

A process where the body adjusts its metabolic rate in response to changes in energy intake or temperature.

Question 3

How does fasting affect thermogenesis?

Answer 3

Fasting may decrease thermogenesis to conserve energy.

Question 4

What is the role of brown adipose tissue (BAT) in fasting-induced thermogenesis?

Answer 4

During fasting, BAT activity decreases, reducing heat production.

Question 5

What is BAT?

Answer 5

BAT stands for Brown Adipose Tissue.

Question 6

How do hormones influence thermogenesis during fasting?

Answer 6

Levels of hormones such as thyroid hormones and leptin that stimulate thermogenesis decrease during fasting.

Question 7

How does the body compensate for the reduced energy intake during fasting?

Answer 7

By decreasing the metabolic rate and conserving energy, including reductions in thermogenesis.

Question 8

Can fasting impact the thermic effect of food (TEF)?

Answer 8

Yes, fasting can reduce TEF, contributing to a lower metabolic rate.

Question 9

What is TEF?

Answer 9

TEF stands for Thermic Effect of Food.

Question 10

What is the Thermic Effect of Food (TEF)?

Answer 10

It’s the increase in metabolic rate after ingestion of a meal.

Question 11

Does fasting affect shivering and non-shivering thermogenesis differently?

Answer 11

Yes, both can decrease during fasting, but non-shivering thermogenesis, primarily driven by BAT, is often more affected.

Question 12

What happens to thermogenesis when fasting ends and refeeding begins?

Answer 12

Thermogenesis typically increases during refeeding, contributing to the postprandial increase in metabolic rate.

Question 13

Can fasting lead to long-term changes in thermogenesis?

Answer 13

Prolonged fasting can result in a persistent reduction in thermogenesis, contributing to energy conservation.

Question 14

How does fasting influence thermogenesis in terms of weight loss?

Answer 14

The decrease in thermogenesis during fasting can slow down weight loss as the body conserves energy.

Question 15

What impact does fasting have on cold-induced thermogenesis?

Answer 15

Fasting may decrease the capacity for cold-induced thermogenesis due to reduced BAT activity.

Question 16

What role does leptin play in fasting and thermogenesis?

Answer 16

Leptin levels decrease during fasting, leading to reduced thermogenesis.

Question 17

What is leptin?

Answer 17

Leptin is a hormone that regulates energy balance by inhibiting hunger.

Question 18

How does intermittent fasting affect thermogenesis?

Answer 18

Intermittent fasting can lead to temporary reductions in thermogenesis during fasting periods.

Question 19

How does fasting influence thermogenesis in muscle tissue?

Answer 19

Fasting may decrease thermogenesis in muscle tissue as part of overall energy conservation.

Question 20

What effect does fasting-induced thermogenesis have on the overall metabolic rate?

Answer 20

It decreases the overall metabolic rate to conserve energy.