Anatomy & Physiology
5th Edition
ISBN: 9780321861580
Author: Marieb, Elaine N.
Publisher: Pearson College Div
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Textbook Question
Chapter 9, Problem 8RQ
Characteristics of isometric contractions include all but (a) shortening, (b) increased muscle tension throughout the contraction phase, (c) absence of shortening, (d) used in resistance training.
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The three key ions in muscular contractions are ....
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D) sodium, potassium, calcium
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O d) amount of time required to
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a) Describe how the isolated muscle behaved as it was stretched progressively.
b) What effect does stretching the muscle have on contraction strength? Is this effect linear?
c) What stretch resulted in the highest contraction force? What happens to the muscle at the highest stretch levels?
Chapter 9 Solutions
Anatomy & Physiology
Ch. 9 - When describing muscle, what does striated mean?Ch. 9 - Prob. 2CYUCh. 9 - How does the term epimysium relate to the role and...Ch. 9 - Which myofilaments have binding sites for calcium?...Ch. 9 - Which region or organelle-cytosol, mitochondrion,...Ch. 9 - What are the three structural components of a...Ch. 9 - What is the final trigger for contraction? What is...Ch. 9 - What prevents the filaments from sliding back to...Ch. 9 - What would happen if a muscle fiber suddenly ran...Ch. 9 - What is a motor unit?
Ch. 9 - What is happening in the muscle during the latent...Ch. 9 - Prob. 12CYUCh. 9 - When Eric returned from jogging, he was breathing...Ch. 9 - List two factors that influence contractile force...Ch. 9 - Prob. 15CYUCh. 9 - How do aerobic and resistance exercise differ in...Ch. 9 - Compare the structures of skeletal and smooth...Ch. 9 - Calcium is the trigger for contraction of all...Ch. 9 - How does the stress-relaxation response suit the...Ch. 9 - The connective tissue covering that encloses the...Ch. 9 - Prob. 2RQCh. 9 - Prob. 3RQCh. 9 - Prob. 4RQCh. 9 - Prob. 5RQCh. 9 - Contraction elicited by a single brief stimulus is...Ch. 9 - A smooth, sustained contraction resulting from...Ch. 9 - Characteristics of isometric contractions include...Ch. 9 - During muscle contraction, ATP is provided by (a)...Ch. 9 - The neurotransmitter released by somatic motor...Ch. 9 - The ions that enter the skeletal muscle cell...Ch. 9 - Myoglobin has a special function in muscle tissue....Ch. 9 - 13. Aerobic exercise results in all of the...Ch. 9 - The smooth muscle type found in the walls of...Ch. 9 - Name and describe the four special functional...Ch. 9 - Distinguish between (a) direct and indirect muscle...Ch. 9 - (a) Describe the structure of a sarcomere and...Ch. 9 - What is the importance of acetylcholinesterase in...Ch. 9 - Explain how a slight (but smooth) contraction...Ch. 9 - Explain what is meant by the term...Ch. 9 - Define and draw a motor unit.Ch. 9 - Describe the three distinct types of skeletal...Ch. 9 - True or false: Most muscles contain a predominance...Ch. 9 - Describe some cause(s) of muscle fatigue and...Ch. 9 - Define EPOC.Ch. 9 - Smooth muscle has some unique properties, such as...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...
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- Select the best answer or answers from the choices given: Characteristics of isometric contractions include all but (a) shortening, (b) increased muscle tension throughout the contraction phase, (c) absence of shortening, (d) used in resistance training.arrow_forward(a) Describe the roles of ATP in the sliding filament mechanism of skeletal muscle contraction. (b) Describe the basic sequence of events that occurs as an action potential arrives at the neuromuscular junction and is transmitted to the muscle cell for contraction.arrow_forwardIdentify the nature and physiological significance of the series-elastic component of muscle contraction.arrow_forward
- Isometric exercise is best described as applying a force O a) with movement through a full and complete range of motion O b) while a muscle is lengthening and returning to a resting position c) without any change in length of the muscle O d) at a constant speedarrow_forwardWhich of the following is not true when comparing slow twitch red and fast twitch white muscle fibers? Question 2 options: a) Red contain more mitochondria than white b) Red contain more myoglobin than white c) Red contracts more slowly than white d) Red contain more glycogen stores than whitearrow_forwardWhat is the difference between a single cross-bridge power stroke and a single twitch of a skeletal muscle fiber?arrow_forward
- (a) Describe the structure of a sarcomere and indicate the relationship of the sarcomere to myofilaments. (b) Explain the sliding filament model of contraction using appropriately labeled diagrams of a relaxed and a contracted sarcomere.arrow_forwarda) What happened to the number of fibers contracting as you increased the voltage? b) In light of the "all or none" law of muscle contraction, how can you explain the graded response?arrow_forwardTo build individual muscle strength and muscle girth (i.e. bulk up), it is best to: O a) do resistance exercises for each muscle at least 6 days per week b) use medium resistance with medium number of repetitions O c) use heavy resistance with few repetitions for multiple sets d) use light resistance with many repetitionsarrow_forward
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