MCAT Biology › Other Metabolic Pathways
The body attempts to maintain a steady concentration of glucose in the blood, promoting consistent brain function and red blood cell survival. When glucose levels fall, however, the body breaks down glycogen to replenish stores for a short period of time before new glucose molecules are made through the process of gluconeogenesis.
In which organ does gluconeogenesis occur?
Which of the following is not an adequate alternative energy source for humans?
Which of the following cannot be directly converted to acetyl-CoA?
When the body is unable to renew its glucose stores through glycogenolysis and gluconeogenesis, it makes ketone bodies derived from beta-oxidation of free fatty acids. Which of the following is not a ketone body utilized by the brain during periods of starvation?
The process of glycolysis is used by all cells of the body to turn glucose into ATP for cellular energy. When stores of glucose are low, however, the body can break down a form of stored glucose in the liver to increase glucose reserves.
What molecule is broken down by a phosphorylase in the liver to yield glucose-1-phosphate?