Answer:
Because oxygen is the combustion fuel and glucose is the substrate needed for synthesis of energy as ATPs during cellular respiration.Therefore Guillermo lacks enough energy as ATPs in her body cells, especially skeletal muscles cells to complete the task of ascending the s steps.
For all the mitochondrial in cells(sites of energy production) to receive needed glucose,and other metabolites needed for energy synthesis; an efficient transport system is needed, so that these materials are available immediately, in required amount. This system is called circulatory system.
And for the the supply of combustion fuel (oxygen) needed for the completion of the ATP synthesis mechanisms; respiratory systems which convey oxygen from the external environments to the circulatory system through breathing mechanisms, for distribution is needed.
Thus the doctor needs to test both the circulatory and respiratory systems.
Explanation:
Isomers is the correct input
Amylase is the enzyme found in saliva an starts to digest food from in the mouth. Starch is a polysaccharide found in foods such as bread, yam, potatoes. This molecule is the carbohydrate component of foods and is the main source of energy as food. At the moloecular level, the enzyme amylase breaks the bond that forms maltose into two individual glucose molecules.
The structures of amino acids are shown in figure (1)
When they form tripeptide it will be like Figure (2)
The structure of tripeptide at pH = 7 will be figure (3)