Bundle: Biology: The Unity and Diversity of Life, 14th + LMS Integrated for MindTap Biology, 1 term (6 months) Printed Access Card
Bundle: Biology: The Unity and Diversity of Life, 14th + LMS Integrated for MindTap Biology, 1 term (6 months) Printed Access Card
14th Edition
ISBN: 9781305774384
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 5, Problem 13SQ
Summary Introduction

Introduction: For large polar molecules and ions, there are special protein called transport protein through which they cross the lipid bilayer. Some transport proteins form pores. Others are gated that close in response to a stimulus. Active transport is a transport where protein pumps a solute across a cell membrane against the solutes concentration gradient which requires energy. Passive transport does not need energy for transport to occur. Facilitated diffusion is a type of passive transport in which solute follows its concentration gradient across a membrane by moving through a transport protein. Osmosis is an example of passive transport, a membrane-crossing mechanism that requires no energy input.

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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license