Summary

This document is a set of notes on cell membranes covering topics such as the fluid mosaic model, the structure and function of proteins, lipids, and carbohydrates in cell membranes.

Full Transcript

CELL MEMBRANE A membrane made up of two layers of phospholipids with embedded proteins that separates the inside of the cell from its environment. PARTS OF CELL FLUID MOSAIC MODEL SINGER & NICOLSON(1972) STRUCTURE AND FUNCTION OF THE CELL MEMBRANE INTENDED LEARNING OUTCOM...

CELL MEMBRANE A membrane made up of two layers of phospholipids with embedded proteins that separates the inside of the cell from its environment. PARTS OF CELL FLUID MOSAIC MODEL SINGER & NICOLSON(1972) STRUCTURE AND FUNCTION OF THE CELL MEMBRANE INTENDED LEARNING OUTCOMES (MELC) ________________________________ Describe the structural components of the cell membrane; and Relate the structure and composition of the cell membrane to its function. Design a fluid mosaic model showcasing components that makes the structure of a cell membrane. Identify the biomolecule found in cell membranes by unscrambling the letters I L P I SD This is a group of organic compound that are insoluble in water. Examples includes fats, waxes, oils, and hormones Identify the biomolecule found in cell membranes by unscrambling the letters L I P I DS This is a group of organic compound that are insoluble in water. Examples includes fats, waxes, oils, and hormones STRUCTURE - PHOSPOLIPID BILAYER AMPHIPATHIC PHOSPHATE GROUP Having both hydrophilic and Hydrophilic head hydrophobic parts FATTY ACIDS SEMI-PERMEABLE Hydrophobic head Pliable – Easily bent Allows substance to pass through but not others Identify the biomolecule found in cell membranes by unscrambling the letters ON P I RT ES These biomolecules are made up of building blocks of called amino acids joined by peptide bonds Identify the biomolecule found in cell membranes by unscrambling the letters PR O T E I NS These biomolecules are made up of building blocks of called amino acids joined by peptide bonds FLUID MOSAIC MODEL SINGER & NICOLSON(1972) STRUCTURE - PROTEINS INTEGRAL INTEGRAL Polytropic – Across PERIPHERAL Monotropic – One Side PERIPHERAL Attached but not embedded STRUCTURE - PROTEINS FUNCTIONS Receptor Channel Transmembrane Cell-Cell Recognition Enymatic Function Identify the biomolecule found in cell membranes by unscrambling the letters DA SOC T RA YB E HR A biomolecule made up of Carbon, Hydrogen, Oxygen. Sugar, starches, and fiber are some of its examples. Identify the biomolecule found in cell membranes by unscrambling the letters CA RBOH YD RA T E S A biomolecule made up of Carbon, Hydrogen, Oxygen. Sugar, starches, and fiber are some of its examples. STRUCTURE - CARBOHYDRATES Found in external surface Types Glycoproteins – attached to proteins Glycolipids – attached to lipids STRUCTURE - CARBOHYDRATES FUNCTIONS Forms distinctive cellular markers Cell-cell recognition Cell-pathogens interaction Identify the biomolecule found in the cell membrane by unscrambling the letters E LC S HOROE T L A type of lipid, a waxy substance found in cells. It is essential in the production of other biomolecules like hormones, steroids, and vitamin D. Identify the biomolecule found in cell membranes by unscrambling the letters C HO L E S T E R O L A type of lipid, a waxy substance found in cells. It is essential in the production of other biomolecules like hormones, steroids, and vitamin D. STRUCTURE - CARBOHYDRATES FUNCTIONS Regulates the fluidity of the membrane when temperature varies high temperature → decreases fluidity low temperature → increases fluidity FLUID MOSAIC MODEL SINGER & NICOLSON(1972) Phospholipid Bilayer Proteins Carbohydrates Cholesterol

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