MBB 231 Lecture Notes - Lecture 8: Bicarbonate, Hemoglobin, Hydrophobe

• School: Simon Fraser University
• Department: Molec Biol & Biochem
• Course: MBB 231
• Professor: Ingrid Northwood

Document Summary

The plasma membrane is permeable to gases (co2 n2 o2) and other small uncharged polar molecules (h2o. Glycerol is slightly permeable therefore it can diffuse across the plasma membrane however it is slower than the. The diffusion rate across a phospholipid bilayer is dependant on the molecules: concentration, hydrophobicity, size. Simple diffusion: the movement of a solute from a region of higher concentration to lower concentration. Diffuses out of the hemoglobin (high concentration) and into the tissues (low concentration). Diffuses out of the tissues (high concentration) and is converted to bicarbonate by the enzyme. Carbonic anhydrase, and diffuses into the blood (low concentration). ] and low [co: high [o, o, bicarbonate ions is converted into co. Diffuses out of the lungs (high concentration) and into the hemoglobin of blood (low concentration). (high concentration) into the lungs (low concentration). by the movement of chloride ions and diffuses out of the blood.