Pretty sure it would be the nerves attatched to the heart valve
controll is your awser you vary a factor to measure the results
This is what I found on the internet: Ethanol The alcohol which is produced<span> as a result of fermentation of sugars by </span>yeast<span>. fermentation A term for respiration in the absence of oxygen. </span>glucose<span> A simple sugar made by the body from food, which is used by </span>cells<span> to make energy in respiration. lactic acid A toxic chemical </span>produced<span> during anaerobic respiration.</span>
