Essentials of Human Anatomy & Physiology (12th Edition)

Published by Pearson
ISBN 10: 1292216239
ISBN 13: 978-1-29221-623-2

Chapter 3 - Cells and Tissues - Review Questions - Page 134: 31

Answer

Functions of muscle tissue are: 1. Movement 2. Maintenance of posture 3. Respiration 4. Heat generation 5. Communication 6. Constriction of organs and blood vessels 7. Pumping blood 8. Protection of internal organs

Work Step by Step

1. Movement: Our body's skeleton gives enough rigidity to our body that skeletal muscles can yank and pull on it, resulting in body movements such as walking, chewing, running, lifting, manipulating objects with our hands, and picking our noses. 2. Maintenance of posture: Without much conscious control, our muscles generate a constant contractile force that allows us to maintain an erect or seated position or posture. 3. Respiration: Our muscular system automatically drives the movement of air into and out of bodies. 4. Heat generation: Contraction of muscle tissue generates heat, which is essential for the maintenance of temperature homeostasis. For instance, if our core body temperature falls, we shiver to generate more heat. 5. Communication: Muscle tissue allows us to talk, gesture, write, and convey our emotional state by doing such things as smiling or frowning. 6. Constriction of organs and blood vessels: Nutrients move through our digestive tract, urine is passed out of the body, and secretions are propelled out of glands by the contraction of smooth muscle. Constriction or relaxation of blood vessels regulates blood pressure and blood distribution throughout the body. 7. Pumping blood: Blood moves through the blood vessels because our heart tirelessly receives blood and delivers it to all body tissues and organs. 8. Protection of internal organs: Internal organs are fragile and sensitive, muscles protect them from outside dangerous.
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