ANSC 1111 Lecture Notes - Lecture 11: Membrane Transport Protein, Extracellular Fluid, Fluid Compartments
Document Summary
Calcium and magnesium are the two most important macrominerals involved in muscle contraction. The three most important macrominerals involved in bone structure are calcium, phosphorus, and magnesium. If sodium potassium atpase wasn"t in the cell, k would want to exit the cell. When sodium and amino acids enter the cell, atp is not required. When potassium enters the cell and sodium leaves the cell, atp is needed since there is already a high concentration of k in the cell. Sodium potassium atpase is important so that other molecules can be carried across the cell. If we do not have these minerals in high amounts, we will not have active transport and therefore we will not be able to get the nutrients we need in our cells. Extracellular fluid (plasma and interstitial fluid) is primarily composed of sodium and chloride. The intracellular fluid is primarily composed of potassium. 3 na out of cell/2k into the cell.
