Glucose-Alanine Cycle | Cahill Cycle | Nitrogenous Waste Transport and Removal

The video explains the glucose alanine cycle, also known as the Kahill cycle, which facilitates the recycling of nitrogenous waste from skeletal muscle to the liver. In skeletal muscle, branched-chain amino acids are catabolized, leading to the formation of alanine, which transports nitrogenous waste to the liver. In the liver, alanine is converted to pyruvate, which can undergo gluconeogenesis to form glucose. The nitrogenous waste is processed through the urea cycle for excretion. The video also covers the role of glutamine in transporting nitrogenous waste to the liver.

What is another name for the glucose alanine cycle?

• Cori cycle

• Kahill cycle

• Krebs cycle

• Calvin cycle

Which enzyme is involved in the initial step of branching amino acid catabolism in skeletal muscle?

• Glutamate dehydrogenase

• Branch chain amino transferase

• Glutamine synthetase

• Alanine aminotransferase

What is the source of pyruvate in skeletal muscle?

• Glycogenolysis

• Gluconeogenesis

• Urea cycle

• Protein synthesis

Why does gluconeogenesis occur only in the liver and not in skeletal muscle?

• Liver lacks glutamine synthetase

• Skeletal muscle lacks alanine aminotransferase

• Skeletal muscle lacks glucose 6 phosphate dehydrogenase

• Liver lacks branch chain amino transferase

What enzyme is responsible for converting glutamine back to glutamate in the liver?

• Glutaminase

• Arginase

• Alanine aminotransferase

• Glutamate dehydrogenase

Which enzyme is required for the urea cycle to occur in the liver?

• Glutamine synthetase

• Arginase

• Glutamate dehydrogenase

• Alanine aminotransferase

How many ammonium groups can glutamine transport to the liver?

• One

• Four

• Two

• Three