After 1 day fasting

Question

After 1 day fasting

BlackTom AI · Accepted Answer

Restating the question: After 1 day fasting

Option a: body proteins will provide some glucose
- This statement is correct. During the early fasting period, the body begins gluconeogenesis, and amino acids from body proteins contribute to hepatic glucose production to maintain blood glucose when dietary glucose is unavailable.

Option b: all of these
- This is not correct because not all the listed statements are true. The claim rests on the validity of each component; since one or more components are inaccurate, the blanket option cannot be correct.

Option c: these fatty acids will provide some glucose
- This is false. Fatty acids cannot be converted into glucose in humans. They are oxidized for energy or used to form acetyl-CoA and ketone bodies, but they do not directly supply glucose through gluconeogenesis.

Option d: glycogen stores will be used to maintain blood glucose levels
- This statement is partially true for very early fasting, when liver glycogen is broken down to release glucose. However, after about 24 hours of fasting, hepatic glycogen stores are largely depleted, and gluconeogenesis from amino acids (and other substrates) becomes the primary source of glucose. Therefore, as a general statement about “after 1 day fasting,” relying on glycogen stores to maintain glucose is not the dominant or reliable mechanism.

In summary, option a correctly identifies that amino acids from body proteins contribute to gluconeogenesis and glucose production during the fasting state after about a day, while options b, c, and d fail for the reasons outlined above. The key misconception in option c is the idea that fatty acids can be converted to glucose, which does not occur in human metabolism; option d overstates the role of glycogen stores after a day of fasting; option b collapses if any single component is false.

After 1 day fasting

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