extra

Question 1

Runner quiz question why do runners slow down

Answer 1

When exercising at high intensity, the cells’ energy demands will exceed what the available levels of O2 can supply aerobically

Hence the body will begin breaking down glucose anaerobically to maximise ATP production

This will result in an increase in the production of lactic acid, which leads to muscle fatigue

When the individual stops exercising, oxygen levels will increase and lactate will be converted back to pyruvate

Question 2

Why do leaves turn diff colors in fall

Answer 2

Chlorophyll a and b molecules denature and therefore accessory pigments of differing colors take over and there colors begin to be presented on the leaf. and that there is less sunlight

Question 3

what are three main purposes of Cellular respiration

Answer 3

break bonds between six carbon atoms of glucose resulting in six Co2 molecules

2) move H atoms electrons from glucose to Oxygen, forming 6 water molecules

3) trap most energy possible released in form of ATP