What are our Body's Basic Energy Needs and Why?

What is ATP and where does it come from?
ATP is an abbreviation for adenosine triphosphate.

ATP comes from the food we eat.

ATP is one of the most important compounds that cells use to store and release enegry.
In other words ATP is the basic energy source used by all types fo cells.

Where does ATP come from or what is ATP made of?
ATP is made up of an adenosine molecule and 3 phosphates.
The phosphate groups are the key to ATP's ability to store and release energy.

Food indirectly gives us energy.
Food > ATP > Energy

The purpose of ATP is molecule that transfer energy from the breakdown of food molecules to cell processes.

Uses of ATP: building molecules and transporting of materials.

What is ADP?
An abbreviation for Adenosine diphosphate.
ADP is a lower energy molecule that can be converted into ATP.
ADP is ATP with one less phosphate.

What is Glycolysis?
Glycolysis is the first set or reactions in cellular respiration.
The word Glycolysis means "sugar-breaking."

Glycolysis occurs in the cytoplasm of a cell.

The Krebs cycle and electron transport chain take place inside the mitochondria and generate the majority of ATP during cellular respiration.

The cell is able to keep the Glycolysis running when there is no oxygen present (anaerobic) and this generates ATP to power cellular activity.

What is Cellular Respiration?
Cellular Respiration releases chemical energy from sugars and other carbon- based molecues to make ATP when oxygen is present
In other words Cellular Respiration is the process that releases energy from food in the presence of oxygen.

Takes place in the mitochondria of cells.

All cells undergo cellular respiration, but not all cells undergo Photosynthesis.

What is the cellular respiration equation and its stages?
The equation of cellular respiration is just the opposite of photosynthesis's equation:

O2 + C6H1206 -> CO2 +H2O + ENERGY
OXYGEN+ GLUCOSE - > CARBON DIOXIDE + WATER + ENERGY

There are three main stages of cellular respiration and they are- glycolysis, the Krebs cylce, andthe electron transport chain.

What is the relationship between Cellular Respiration and Photosynthesis?
Photosynthesis removes carbon dioxide from the atmosphere when cellular respiration put is back.
Photosynthesis releases oxygen into the atmosphere, and cellular respiration uses that oxygen to release energy from food.

Aerobic Process
Aerobic ("in air") processes are pathways of cellular respiration that require oxygen.
Some aerobic processes are the Krebs Cycle and electron transport chain.
                                                   Requires air ->>>



What is the Krebs Cycle?
A pyruvate is the process were we split glucose into 2 molecules.
Pyruvic acid is broken down into carbon dioxide in a series of energy- extracting reactions during the Krebs cylce.

The Krebs Cycle is also known as the Citric Acid Cycle because citric acid is the first compound formed during the reactions.

Anaerobic Process
An Anaerobic ('without air') Process is pathways of cellular respiration that does not require oxygen.

Examples would be Glycolysis, fermentation, and lactic acid.

Fermentation releases energy form food molecules by producing ATP in the absence of oxygen.