Answered: An explanation leading to the correct…

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

Hello, may I please get help with this physiology question? An explanation leading to the correct answer would be helpful! Scenario: Your friend Arnold S, who sometimes goes by "Dutch", has started lifting weights because he wants his muscles to get bigger. He's done a little bit of research, and he tells you that weight lifting is increasing the size of myofibrils. Arnie is getting huge, and so you are hesitant to correct him, but you know that what he's saying isn't quite right. The more likely explanation for Arnold's muscles getting bigger is...

he's getting more slow-
oxidative fibers
the myofibrils are
getting shorter
YES
he's attracting more water
into his cells without any
other changes
He's increasing the
diameter of his muscle
fibers

Expert Solution

Step 1: Introduction

Weightlifting is a popular and effective form of resistance training that plays a pivotal role in muscle growth and development. When individuals engage in weightlifting, they subject their muscles to controlled stress and resistance, which leads to a series of physiological changes within the muscle fibers. This process, known as muscle hypertrophy, involves an increase in the size and strength of the muscles. Understanding how weightlifting triggers muscle growth is essential for anyone looking to build and sculpt a more muscular physique.