BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 26, Problem 5MCQ
Summary Introduction

Introduction:

Skeleton is a hard structure that protects the internal organs of a living organism. A system, composing bones, muscles, and other tissues that help in the movement and locomotion in an individual, is called a skeletal system.

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Which of the following is arranged in order from smallest tolargest?a. Motor unit < sarcomere < muscle cell < actin subunitb. Muscle cell < actin subunit < sarcomere < motor unitc. Actin subunit < sarcomere < muscle cell < motor unitd. Sarcomere < motor unit < actin subunit < muscle cell
Which of the following statements best describes the sliding filament mechanism of muscle contraction? a. Actin and myosin filaments do not shorten, but rather, slide past each other. b. Actin and myosin filaments shorten and slide past each other. c. As they slide past each other, actin filaments shorten, but myosin filaments do not shorten. d. As they slide past each other, myosin filaments shorten, but actin filaments do not shorten.
Which of the following sentences is NOT correct? A. White fibers make up fast-twitch muscle B. Muscle spindle is a type of receptor that detects muscle length C. Exocrine gland secretes its product directly into the bloodstream D. When an action potential is generated within a motor neuron, every muscle cell of the motor unit is stimulated to contract
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