1 During endurance exercise protein can contribute up to 15

1. During endurance exercise, protein can contribute up to 15% of energy needs, especially when muscle glycogen stores are depleted. Which of the following amino acids is most likely to be metabolized for energy?

a) phenylalanine

b) tyrocine

c) leucine

d) methionine

2. Blood glucose levels are maintained by

a) adequate hydrogen

b) muscle glycogen

c) liver glucogen

d) brain glycogen

Solution

Answers :

1 . C . leucine - During endurance exercise, leucine is most likely to be metabolised for energy. The whole body protein breakdown can be observed with the leucine during exercise.Whole body leucine pool may decrease with the exercise due to increased oxidation of leucine by muscle contracting. After exercise the protein breakdown can be observed with the phenylalanine tracer.

2 . C . liver glycogen. It serves as a pool to maintain the blood glucose levels.