https://youtu.be/wsK_tFe2Yrw
Metabolism, the sum of all chemical reactions within living cells, plays a pivotal role in sustenance. It involves numerous intricate chemical reactions, organized into pathways that convert one chemical to another. These reactions are categorized into catabolic, which break down compounds, and anabolic, which build up compounds.
Metabolism can be further classified into three main categories:
- Chemical reactions used for converting food into energy.
- The conversion of food into building blocks for items like proteins.
- Chemical reactions needed for waste elimination.
Enzymes are crucial to metabolism, as they accelerate chemical reactions. Substrates are the molecules upon which enzymes act, and the enzyme converts them into different molecules known as products. Almost all chemical reactions in cells require enzymes to occur at rates fast enough to sustain life.
Over 5,000 chemical reactions in plants, animals, and microbes are controlled by enzymes. The structures of animals, plants, and microbes are primarily composed of three basic classes of molecules: amino acids, carbohydrates, and lipids.
Many chemical reactions focus on creating these molecules during cell and tissue construction or breaking them down and using them as an energy source. These chemicals can also be combined to form DNA and protein
https://youtu.be/fgFwdpd-PAg
You may enjoy this video.
Homeostasis is the process by which an organism maintains a stable internal environment despite changes in the external environment. Homeostasis is essential for life, as it allows the body or a cell to function properly even in the face of changing conditions.