Pearson eText Biology: Science for Life -- Instant Access (Pearson+)
Pearson eText Biology: Science for Life -- Instant Access (Pearson+)
6th Edition
ISBN: 9780135214084
Author: Colleen Belk, Virginia Maier
Publisher: PEARSON+
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Chapter 3, Problem 7LTB
Summary Introduction

Introduction:

The cell membrane or plasma membrane is a biological membrane. It separates the internal cellular substances from its outside environment. It is a double layer membrane. It is selectively permeable that means it allows only some of the molecules to enter and exit.

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A substance moving across a membrane against a concentration gradient is moving by:   active transport   facilitated diffusion   passive transport   osmosis
Differentiate the following: simple diffusion; facilitated diffusion Facilitated diffusion, active transport Endocytosis; exocytosis(in terms of purpose, substance transported, direction of motion of the vesicle) Bulk flow; cytoplasmic streaming
The movement of a substance across a membrane, from low to high concentrations of that substance (requiring the expenditure of energy, often in the form of ATP hydrolysis), is always categorized as: active transport facilitated diffusion simple diffusion passive transport osmosis
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license