Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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- The plasma membrane is a lipid bilayer structure consisting of a phospholipid bilayer with some integral proteins that are mostly glycoprotein.
- The membrane consists of a hydrophobic head made up of cholesterol facing towards the outer side just like two slices of bread in a sandwich and a hydrophilic tail present inwards like the filling between two slices of bread.
- The cell membrane is permeable to hydrophobic substances as the cell membrane is also hydrophobic at its periphery while for hydrophilic substances integral proteins or channel proteins are embedded in the membrane to facilitate their transport.
- The cytosol and extracellular fluid is majorly composed of water with other few substances such as fibers and proteins embedded in it.
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