Complicated question.
It's somewhat dependent on the available food. In a perfect world (ie: one where every type of nutrient is available in abundance), our bodies prefer glucose, as do most fauna.
Plants are a little different -- they don't "break down" in the way you're thinking, although they do use carbon dioxide in the air and water from the ground to produce ATP, as well as glucose, which we use as an energy source. Think of plants and animals as inversions of each other -- we break down glucose and put out carbon dioxide, and they break down carbon dioxide and put out glucose.
We can also burn practically anything for energy to make ATP. Energy from the breaking of chemical bonds is used (to create the MOST ATP, but this isn't the only way to make it) to create an electrical charge across a membrane to drive the formation of ATP. This can include the breakdown of protein and fats, as well as carbohydrates (simple and complex sugars) that aren't glucose.
My authority? University student at The University of Western Ontario (London, ON, Canada), honours specialization in cell & developmental Biology and major in genetics.
The monosaccharide glucose, which is not a macromolecule, is most commonly broken down to make ATP in the process of cellular respiration. However, starch (in plants) and glycogen (animal starch) macromolecules are composed of millions of glucose molecules bonded together, and when the cells start to run out of glucose molecules, the starch or glycogen is broken down to release more glucose molecules that can then be broken down to make more ATP.
Carbohydrate, lipids, or proteins can be broken down to make ATP. Carbohydrates are the molecules most commonly broken down to make ATP.
Most large insoluble molecules get broken down in the digestive system to small (simpler) soluble molecules.
most neurotransmitters are not actually broken down, rather they are actively transported back into their pre release vesicles (this is called reuptake). Some neurotransmitters are broken down by a specific enzyme into non active parts i.e acetylcholine broken down by acetylcholinestarase
Nucleic Acid
Yes. In order for the body to use food, the food must be broken down into it's most basic elements. Complex carbohydrates are broken into simple carbohydrates, proteins are broken down into amino acids and fats are broken down into fatty acids. Some of this break down takes place because of the acids in your stomach, but enzymes in the stomach and mouth are required to further dismantle food into usable nutreints.
Carbohydrate, lipids, or proteins can be broken down to make ATP. Carbohydrates are the molecules most commonly broken down to make ATP.
Carbohydrate, lipids, or proteins can be broken down to make ATP. Carbohydrates are the molecules most commonly broken down to make ATP.
Most large insoluble molecules get broken down in the digestive system to small (simpler) soluble molecules.
cool
Most trimmers,can be partially broken down for cleaning and repair.
Broken wrists and broken arms and broken legs. but i think most people will at one time or another experience a broken heart.
Steak and most meats contain mostly protein and fat. The protein is broken down to amino acids and the fat is broken down to fatty acids and glycerine.
Steak and most meats contain mostly protein and fat. The protein is broken down to amino acids and the fat is broken down to fatty acids and glycerine.
most neurotransmitters are not actually broken down, rather they are actively transported back into their pre release vesicles (this is called reuptake). Some neurotransmitters are broken down by a specific enzyme into non active parts i.e acetylcholine broken down by acetylcholinestarase
When cell needs energy then the first molecule which is used is Glucose . If glucose level is low then Glycogen is broken down to get glucose . If glycogen is also in less amount then fats are broken down to get energy . Even then energy is needed then at last body Proteins are used up .
proteins
In humans, food is most broken down in the stomach where enzymes, bacteria and acids break the food into simpler parts. The food is then passed to the intestines, where the nutrients are absorbed.