MUSCLE PHYSIOLOGY

Detailed explanation-1: -Explanation: Oxygen serves as the terminal electron acceptor for the electron transport chain. Electrons are donated by NADH molecules and passed through several different proteins to generate the proton gradient in the intermembrane space.

Detailed explanation-2: -Both glycolysis and the citric acid cycle require NAD+ to accept electrons during their chemical reactions. In order for the cell to continue to generate any ATP, NADH must be converted back to NAD+ for use as an electron carrier.

Detailed explanation-3: -Oxygen is the electron acceptor in the electron transport chain. It accepts the electron produced by NADH taking place in the mitochondria.

Detailed explanation-4: -It is an electron carrier used to temporarily store energy during cellular respiration. This is found in two forms in cells: NAD+ is an oxidizing agent – it accepts electrons from other molecules and becomes reduced. This reaction forms NADH, which can then be used as a reducing agent to donate electrons.

Detailed explanation-5: -NAD+ is used by the cell to “pull” electrons off of compounds and to “carry” them to other locations within the cell; thus it is called an electron carrier.