BIOL 1103 1st Edition Lecture 8 Outline of Last Lecture II. History of the CellIII. Prokaryotes vs. EukaryotesIV. Cell Parts and NucleusOutline of Current Lecture V. Plasma membraneVI. Phospholipids and Hydrophilic and Hydrophobic partsVII. Diffusion and concentration gradientVIII. AquaporinsIX. Active and Passive TransportX. EndocytosisCurrent Lecture- Plasma membrane is a thin, fluid membrane that manages to be very flexible and yet is stable enough to stay together despite being continually remade due to constant movement- Phospholipids make up cell membraneo Composed of fatty acid chainso Has glycocalyx on cell surfaceo Hydrophobic molecules pass freely through membraneo Hydrophilic molecules do not- Diffusion is movement of molecules or ions from highest region of concentration to region of lower concentration- Concentration gradient is difference between highest and lowest concentration of solutewithin given medium- Aquaporins selectively conduct water molecules in and out of cell while preventing passage of ions and other solutes- Simple diffusion is type of passive transport where molecules move down their concentration gradient through phospholipid bilayer- Facilitated diffusion is also passive transport; passage is aided by concentration gradient and transport protein- Active transport is where molecules move through transport protein but expend energy - Endocytosis is taking things into cells; there are two methods of endocytosisThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o Phagocytosiso
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