1. With age, the collagen-containing connective tissue coverings of skeletal muscles increase and the number of muscle fibers decreases. Is meat from an older or a younger animal more tender? Explain. 2. Weight training increases muscle fiber size by increasing the number of myofibrils. Explain. 3. The diaphragm is a muscle that controls inspiration. Is control of the diaphragm voluntary, involuntary, or both? Explain.

1. With age, the collagen-containing connective tissue coverings of skeletal muscles increase and the number of muscle fibers decreases. Is meat from an older or a younger animal more tender? Explain. 2. Weight training increases muscle fiber size by increasing the number of myofibrils. Explain. 3. The diaphragm is a muscle that controls inspiration. Is control of the diaphragm voluntary, involuntary, or both? Explain.

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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Similar questions

Explain questions no 2 only
A fatigued muscle lacks sufficient oxygen for the aerobic respiration to supply needed ATP. The accumulation of Select one: a. acetic acid occurs and contractions occur with less strength b. lactic acid (lactate) occurs and muscle cramps may set in c. pyruvate occurs and muscle cramps set in d. ethyl alcohol occurs and less frequent contractions occur
2. Compare and contrast the characteristics of skeletal, smooth and cardiac muscles and identify their locations in the body.
9. Explain the process that occurs to generate a muscle contraction. Name the four major stages and be able to describe the events that happen at each stage.
Predict the effect of the following on muscle contraction:A. Bitten by a black widowB. CurareC. Neostigmine
Muscle Fiber Contraction The process of muscle contraction involves which ion? a. Na+ b. K+ С. Са2+ d. Cl-
3. There are three types of skeletal muscles we discussed in class. a. List all 3 b. All of these skeletal muscle types utilize Ca²+ at some point during excitation, excitation contraction coupling, and contraction. Describe the role of Ca²+ in stimulation to skeletal muscle excitation to contraction. c. List at least 2 other features of skeletal muscle types that you can compare across all three types. OC
4B. Name the two major factors that influence the strength of a muscle contraction and list the effects they each have. Be sure to describe the different types of muscle contractions (e.g. twitch, tetanus) and what causes them.
The fewer muscle fibers present in a motor unit and the greater the number of motor units in a muscle as a whole: 1. the less likely these muscle fibers will fatigue. 2. the less likely an action potential will be generated in the muscle fibers of that motor unit. 3. the stronger the contractions of muscle fibers in that motor unit.
1. This term describes the resting state of a muscle. A. muscle tone B. none of the other choices are correct C. muscle atrophy D. motor unit
Which of the following statements relating to the developmental aspects of muscles is false? a. All muscle tissue types arise from myoblasts b. Skeletal muscles become amitotic while smooth muscles regenerate throughout life c. Sarcopenia begins by age 30 and is irreversible d. Body strength per unit muscle mass is the same in both sexes e. none of the above Which of the following structures is located in the head region of the thick filament myosin? a. actin binding site b. ATP binding site c. ATPase enzyme d. all of the above e. none of the above
Explain the role of tropomyosin in the muscle contraction process? How are the intercalated discs involved in the contraction of cardiac muscles?