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Chapter-13 Structure and Functions of Cell Membrane

BOOK TITLE: Essentials of Nutrition and Biochemistry for Basic BSc Nursing

Author
1. Clement I
ISBN
9789385891526
DOI
10.5005/jp/books/18059_14
Edition
1/e
Publishing Year
2018
Pages
12
Author Affiliations
1. VSS College of Nursing, Bangalore, VSS College of Nursing, Bengaluru, Karnataka, India, VSS College of Nursing, Nagadevanahalli, Mysore Ring Road, Bengaluru, Karnataka, India, VSS College of Nursing, No. 78, Nagadevenahalli, Mysore Ring Road, Bengaluru, India, VSS College of Nursing Nagadevanahalli, Bengaluru, Karnataka, India, VSS College of Nursing, Nagadevanahalli, Bengaluru, Karnataka, India, VSS College of Nursing, Nagadevanahalli, Bengaluru (Karnataka), India, Columbia College of Nursing, Bengaluru, Karnataka, India
Chapter keywords
Cell membrane, semi-permeable membrane, cytoplasm, fluid mosaic model light junction, cytoskeleton, transport mechanism, acid-base balance, ph Buffer

Abstract

The cell membrane is a thin semi-permeable membrane that surrounds the cytoplasm of a cell, enclosing its contents. Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell, while keeping other substances out. The cell membrane is primarily composed of a mix of protein and lipids. This chapter covers the fluid mosaic model light junction, cytoskeleton, transport mechanisms, acid-base balance, and ph Buffers. The cytoskeleton provides support in a cell. It is a network of protein fibers supporting cell shape and anchoring organelles within the cell. The three main structural components of the cytoskeleton are microtubules (formed by tubulins), microfilaments (formed be actins) and intermediate filaments. The pH (or the amount of hydrogen ions (H+) in a solution) level of the blood is important in ensuring the proper functionality of biological systems. The optimal pH level of the blood is 7.4, which is maintained by three different types of buffer systems working in the body.

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