KAAP309 Lecture Notes - Lecture 3: Glycogen, Adenosine Monophosphate, Ribosome

• School: University of Delaware
• Department: Kinesiology & Appl Physiology
• Course: KAAP309
• Professor: Rose William

Document Summary

3 basic parts of a human cell: plasma membrane = flexible outer boundary, cytoplasm = intracellular fluid containing organelles, nucleus = control center. Biomolecular layer of lipids and proteins in a constantly changing fluid mosaic: fluid mosaic model. Plays a dynamic role in cellular activity. Separates intracellular fluid from extracellular fluid: interstitial fluid = ecf that surrounds cells. Integral proteins: firmly inserted into the membrane (most are transmembrane, functions: b. i. Receptors: peripheral proteins, loosely attached to integral proteins b. Include filaments on intracellular surface and glycoproteins on extracellular surface: functions: c. i. Provide support on intracellular surface c. v. form part of glycocalyx. 3 types: tight junction = impermeable, desmosome = anchoring junctions that binds to adjacent cells, gap junction = communication. Passive: no atp required, substance moves down concentration gradient. Active: atp required, only in living cell membranes. Determinants of whether or not a substance can passively permeate a membrane: lipid solubility of a substance, channels of appropriate size, carrier proteins.