Nutrition Exam

Question 1

What does it mean to say fat burns in the flame of CHO?

Answer 1

Means that you need the “carbohydrate fireplace” in order to burn the “fat logs”.

• To burn fat, you must have an active Kreb’s cycle, which depends on the availability of oxaloacetate.
• This is not a problem while glycogen is present.
• When glycogen is depleted, you have
  gluconeogenesis (from glucogenic amino acid
  catabolism) to maintain blood glucose.
• Oxaloacetate is a gluconeogenic precursor, so if something ELSE isn’t doing this job, oxaloacetate will be used to make glucose and the Kreb’s cycle slows and can’t burn fat

Question 2

What blood homeostatic factors must we maintain

Answer 2

Must maintain:
1) blood glucose between 60-100mg/dL (< 60mg/dL you develop a coma and die)
2) blood pH near neutrality (related to amino group handling)

Question 3

What is blood glucose required for?