Weight Loss Weight Loss Metabolism 2

Question 1

What is 'metabolic flexibility' and why is it considered a health goal in weight management?

Accepted Answer

The ability to efficiently switch between burning carbohydrates and fats as fuel

Answer

Metabolic flexibility is the capacity to readily switch fuel sources—using carbohydrates or fats depending on availability and demand—which supports efficient energy use and healthy body composition.

Question 2

What happens to resting metabolic rate during prolonged caloric restriction, and why is it a challenge for weight loss maintenance?

Accepted Answer

It decreases through adaptive thermogenesis, reducing total calorie burn

Answer

Prolonged caloric restriction triggers adaptive thermogenesis—the body reduces metabolic rate and energy expenditure to conserve resources, which slows weight loss over time.

Question 3

Which metabolic process converts excess carbohydrates and protein into fat for storage when caloric intake exceeds expenditure?

Accepted Answer

De novo lipogenesis

Answer

De novo lipogenesis is the metabolic pathway that synthesizes fatty acids from excess acetyl-CoA derived from surplus carbohydrates or protein, contributing to fat mass gain.

Question 4

What is the role of brown adipose tissue (BAT) in metabolism and weight management?

Accepted Answer

BAT burns calories to generate heat, potentially aiding weight management

Answer

Brown adipose tissue contains a high density of mitochondria and burns calories through thermogenesis (heat production), and activating BAT is an emerging target for obesity treatment.

Question 5

How does the gut microbiome influence metabolism and body weight according to emerging research?

Accepted Answer

Gut bacteria affect calorie extraction from food, inflammation, and hormonal signals that regulate appetite

Answer

The composition of gut bacteria influences how many calories are extracted from food, systemic inflammation levels, and the production of hormones like GLP-1 that regulate appetite and metabolism.

Weight Loss Practice Test

Weight Loss Practice Test

Weight Loss Weight Loss Metabolism 2