during moderate exercise, a body gets most of its energy from?

Question

A) Carbohydrates
B) Glucose
C) Cellulose
D) Triglycerides

Answer 1

from the above:
a)carbohydrates

as first glucose is the substrate for respiration and energy released is used by the muscle cells in form of ATP molecules
as available glucose content decreases
the glycogen stored in body is converted into glucose by the liver and poured into the blood stream and again we recieve energy
during this process the oxygen which is available decreases and finally muscles start getting energy through anaerobic respiration and lactic acid is produced which accumulates and the muscles get fatigued and we get an oxygen debt which is later paid by rest and intake of food

Answer 2

The only answer you can definitively rule out is C, since most animals lack the capability to break down cellulose enzymatically.

The answer is tricky, since technically B is correct, glucose is the smallest unit of sugar able to enter a cell for ATP production, glucose is classified as a carbohydrate, so the answer could be A or B, depending on what knowledge your teacher is actually trying to get you to demonstrate here.

At some point in exercise on hand glucose reserves run out and the body has to switch to triglyceride, or fat as an energy source. So really at some point, even in moderate exercise, when glucose reserves run out you'll have to switch to D, trigycerides, though I suspect your teacher isn't looking for this answer.

Answer 3

Okay, most of you have it all wrong. First of all, glucose is a type of carbohydrate. By definition all sugars are carbohydrates. So A=B. Now it is true that during glycolysis glucose is used to produce ATP, however, the only stores of glucose are the liver and muscle and these stores are quickly depleted during excercise. Glucose stores (Glycogen) are depleted after about 15-30 min of excercise. So, guess what the body does once it runs out of glycogen? It switches over to using triglycerides (fat) and are then incorporated into the glycolysis cycle as glycerol and the Kreb cycle as ketones. So, during excercise most of the energy is really produced by D-triglycerides. That's why fat people tend to be sendentary and thin people tend to be more active.

Answer 4

I agree with Emerson that "The body gets its energy from all of these answers during various stages of excercise". However I can't decide between A and B (more towards B)

It is a trick question since you use all of these (except for cellulose). Actually glucose is a carbohydrate and it is stored in the form of glycogen in muscle and liver. However glycogen is broken down to glucose in order to be used as fuel...
Also how do you define moderate?
Sprinting which needs lots of energy in a short period of time is powered by ATP, phosphocreatine and anarobic glycolysis of glycogen.
Marathon also needs lots of energy but over a big period of time and in the beginning the main fuel is glycogen and later on lipids.

Answer 5

Glucose and triglycerides. The amount used of each depends on how long the exercise lasts. Carbohydrates and glucose both as answers are redundant and cellulose can not be broken down by humans.

Answer 6

The body gets its energy from all of these answers during various stages of excercise. If you were to choose one, I would go with Glucose.

Glucose is what enters into cellular respiration within the mitochondria to produce ATP. ATP is the energy that allows us to undergo biochemical interactions and motility.

When excerising, the first use up the fat in your blood stream. Then you use the glycogen fat storage of the liver (reserve) and then, lastly you start to burn superficial fascia.

Answer 7

b goes first than a