The Respiratory System: Structure and Function

Function supplies oxygen to cells and removes carbon dioxide defending the body against invasion of microorganisms control the body’s blood pH Components: Ventilation (breathing) > inhalation and exhalation; take in oxygen and dispose of carbon dioxide External Respiration > the exchange of gases between the alveoli and the blood Internal Respiration > exchange of gases…

Facilitated Diffusion & Active Transport

Facilitated Diffusion Allows diffusion of large, membrane insoluble compounds such as sugars (glucose) and amino acids Does not require energy (passive transport) Substance binds to membrane transport protein Molecules may enter the cell and leave the cell through the transport protein. Particles move from areas of high concentration to areas of low concentration; diffuse Active…

Enzymes: Structure and Function

Enzymes are specialized proteins that speed up chemical reactions (biological catalysts) Without enzymes, cellular chemical reactions could not occur fast enough to maintain life. Enzyme Activity: –      enzyme binds to the reactants, called the substrate(s), of a chemical reaction –      the substrate joins with the enzyme at the enzymes active site forming an enzyme-substrate complex…