BIOD27H3 Chapter 3: Chapter Notes for Chapter 3 of Human Physiology 5e
Document Summary
advantages: compartments separate biochemical processes that might otherwise conflict with one another; barriers allow contents within compartments to differ from adjacent ones. disadvantages: barriers can make it difficult to move needed materials from one compartment to another. functionally, the body has three fluid compartments: intracellular fluid, plasma, interstitial fluid (plasma, interstitial = extracellular fluid) Biological membranes all membranes have a uniform thickness of about 8 nm two meanings of membranes: 1. membrane lipids form a bar rier between the cytoplasm and. Extracellular fluid: 3 main types of lipids in membrane: phospholipid: glycerol backbone with two fatty acid chains and a phosphate group. sphingolipid: fatty acid tails, phospholipid or glycolipid head, slightly longer than phospholipid. cholesterol: helps make membranes impermeable to small water- soluble molecules and keeps membranes flexible. membrane proteins may be loosely or tightly bound to the.
