Answer to Question 1
Glucose provides muscles with an important energy source.
Under conditions of low oxygen availability, glycolysis
can metabolize glucose to provide a quick source of ATP.
Although glycolysis can rapidly generate small amounts
of ATP, the system is not sustainable. This is because the
end-product of glucose metabolism is pyruvate, which is
converted to lactic acid. The majority of lactic acid dissociates
into lactate and hydrogen ions. The accumulation of
hydrogen ions causes muscles to fatigue.
Answer to Question 2
A
The Z scheme, which depicts the energy of an electron as it moves from photosystem II to NADP+
Comparative substrate cycles in glycolysis/gluconeogenesis
World Total Energy Consumption by Fuel Type
Hydrogen burns to produce energy and water
Staying hydrated during physical activity
The flow of energy and the cycling of materials maintain nature’s organization