What are the three types of channel proteins, and whatsignal causes each to open or close?

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
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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What are the three types of channel proteins, and what
signal causes each to open or close?

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Plasma membrane is a lipid bi layer which is flexible and has a tough barrier which contains cytoplasm of the cell. It is selectively permeable. Also called a cell membrane, it is described effectively by the fluid mosaic model given by singer & Nicolson in 1972. The lipid bi layer is made up of phospholipids, cholesterol & glycolipids, proteins & carbohydrates.

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