Sugars and Sweeteners

How is fructose metabolism different from glucose metabolism?

• Fructose is metabolized primarily in muscle cells

• Fructose enters glycolysis after the phosphofructokinase step, bypassing key regulation

• Fructose generates more ATP than glucose

• Fructose is excreted unchanged

What is a key metabolic characteristic of artificial sweeteners like sucralose and aspartame?

• They are metabolized rapidly to produce glucose

• They provide significant calories and raise blood sugar

• They are poorly metabolized or not metabolized, contributing minimal calories

• They are broken down into ketone bodies

What is one metabolic advantage of consuming moderate amounts of natural sugars from fruits?

• They suppress all insulin release

• They bypass digestion

• They increase fat oxidation

• They supply fiber and micronutrients along with energy

What metabolic risk is associated with high consumption of added natural sugars (e.g., sucrose, high-fructose corn syrup)?

• Increased insulin sensitivity

• Decreased nutrient absorption

• Development of insulin resistance and fat accumulation

• Improved mitochondrial function

How do artificial sweeteners reduce calorie intake?

• By replacing high-calorie sugars with low- or zero-calorie alternatives

• By increasing insulin release

• By converting into ATP more efficiently

• By blocking glucose absorption in the gut

Which of the following is a potential concern with long-term consumption of artificial sweeteners?

• Enhanced glucose tolerance

• Disruption of gut microbiota and altered insulin response

• Improved pancreatic β-cell function

• Decreased fat storage

Aspartame is metabolized in the body into amino acids and contributes some calories.

• True
• False

What happens to excess glucose in the body when energy needs are already met?

• It is stored as glycogen or converted to fat

• It is exhaled as carbon dioxide

• It is broken down into amino acids

• It is converted to ketone bodies

Artificial sweeteners can sometimes affect gut microbiota, which may influence metabolic responses.

• True
• False

All forms of sugar, natural or artificial, are metabolized the same way in the human body.

• True
• False