Rising sarcoplasmic calcium levels results in contraction in both smooth muscle fibers and skeletal muscle fibers.True or FalseTrueFalse

Answered: Rising sarcoplasmic calcium levels…

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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Question

Rising sarcoplasmic calcium levels results in contraction in both smooth muscle fibers and skeletal muscle fibers.
True or False
True
False

Expert Solution

Introduction

Muscle is a soft tissue that contains protein filaments that help in the contraction and provide motion. There are three type of muscles cardiac, smooth and skeletal.

Smooth muscle have non-striated fibers and are located in walls of hollow visceral organs and are also under involuntary control.

While Skeletal muscle fibers occur in muscles which are found attached to the skeleton. They are striated in appearance and are under voluntary control.

The Sarcoplasmic reticulum (SR) is a membrane-bound structure found within muscle cells whose main function is to store calcium ions (Ca²⁺).

While these are most abundant in the skeletal muscle than the smooth muscle.