Human Physiology: An Integrated Approach (7th Edition)
Human Physiology: An Integrated Approach (7th Edition)
7th Edition
ISBN: 9780321981226
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 21, Problem 9CC
Summary Introduction

To determine: The reason for tonic contraction in some sphincters of the digestive system.

Introduction: Majority of the gastrointestinal tract is made up of continuous smooth muscles. These muscles have some group of cells which are connected electrically with the help of gap junctions. These cells create contracting segments. Different types of contractions can be seen in different regions of the tract. The contractions which sustain for a few minutes or several hours are known as tonic contractions.

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