Exercise Physiology | L-Norvaline Functions and Catabolism

The video tutorial discusses norvaline, an amino acid not typically found in proteins, and its role as a supplement. It explains norvaline's catabolic pathway, similar to branched-chain amino acids, and its conversion to butyryl CoA for energy production. The tutorial also highlights norvaline's ability to increase nitric oxide levels by inhibiting arginase, thus enhancing blood flow during exercise. This dual function makes norvaline valuable for both energy production and as an ergogenic aid.

What is Norvaline primarily known as?

• A proteinogenic amino acid

• An isomer of valine

• A type of carbohydrate

• A vitamin supplement

What is the initial step in the catabolic pathway of Norvaline?

• Direct entry into the TCA cycle

• Reaction with a transaminase

• Conversion to acetyl CoA

• Oxidation in the cytoplasm

Which molecule is produced from Norvaline after it undergoes beta oxidation?

• Glucose

• Lactic acid

• Pyruvate

• Acetyl CoA

How does Norvaline affect the urea cycle?

• It increases the production of ornithine

• It enhances the conversion of ammonia to urea

• It inhibits the enzyme arginase

• It decreases nitric oxide production

What is the primary benefit of increased nitric oxide production during exercise?

• Reduced muscle fatigue

• Increased fat oxidation

• Improved blood flow to muscles

• Enhanced protein synthesis

What is the major reason for taking Norvaline as a supplement?

• To increase protein synthesis

• To boost immune function

• To enhance nitric oxide production

• To improve carbohydrate metabolism

Which enzyme does Norvaline inhibit to conserve arginine?

• Arginase

• Nitric oxide synthase

• Transaminase

• Dehydrogenase