Basic Biomechanics
7th Edition
ISBN: 9780073522760
Author: Susan J Hall
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 7, Problem 4AP
ADDITIONAL PROBLEMS
4. Which muscles are most likely to serve as agonists to produce the movements identified in your answer to Problem 3?
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I. INSTRUCTION: Compute for the following given problem.
1. Emily can lift 21 kg (210 newtons force) using muscles that have a cross-sectional
area of 6 cm2. Use this formula to work out how many newtons per square
centimetre her muscles can pull with:
Formula: Force/Area
TRUE OR FALSE
1. The longer the time tension is exerted, the greater the muscular endurance. *
2. The greatest amount of torque is produced by maximum tension in a muscle that is oriented at a 90° angle to the bone, and anatomically attached as far from the joint center as possible. *
3.The greater the torque a muscle can produce, the greater the movement it will produce on the body’s levers. *
4. When the fibers of a pennate muscle shorten, they rotate about their tendon attachment or attachments, progressively decreasing the angle of pennation. *
5.The fast-twitch fibers have smaller diameter than the slow-twitch fibers. *
6.At maximum velocity, no cross-bridges can form, so no force is generated, resulting in the production of zero power. *
7.The smaller number of cross-bridges results in a larger amount of force. *…
Question 10. Why does the sarcomere length
appear to shorten (from Z line to Z line) when
a muscle contracts?
Chapter 7 Solutions
Basic Biomechanics
Ch. 7 - Construct a chart listing all muscles crossing the...Ch. 7 - Prob. 2IPCh. 7 - Prob. 3IPCh. 7 - INTRODUCTORY PROBLEMS 4. List the muscles that...Ch. 7 - INTRODUCTORY PROBLEMS 5. List the muscles used as...Ch. 7 - INTRODUCTORY PROBLEMS 6. Explain how the use of an...Ch. 7 - INTRODUCTORY PROBLEMS 7. Select a familiar...Ch. 7 - 8. Using the diagram in Sample Problem 7.1 as a...Ch. 7 - 10. Solve Sample Problem 7.2 with the addition of...Ch. 7 - Identify the sequence of movements that occur at...
Ch. 7 - Which muscles are most likely to serve as agonists...Ch. 7 - Prob. 3APCh. 7 - ADDITIONAL PROBLEMS 4. Which muscles are most...Ch. 7 - Prob. 5APCh. 7 - Prob. 6APCh. 7 - 8. How much tension (Fm) must be supplied by the...Ch. 7 - 9. What is the length of the moment arm between...Ch. 7 - Prob. 10AP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, bioengineering and related others by exploring similar questions and additional content below.Similar questions
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- 2. We discussed how muscle spindles allow for precision of movement as a muscle lengthens, and particular muscles which require more precise movements will contain more spindles. In addition to this precision control over muscle length, there are other differences between muscles which enable more precision in how much force is generated. Consider the two graphs below which depict force generated by two different muscles as additional motor units are recruited. Force Muscle A Load Force Muscle B Load a) Describe why the first steps for a low force contraction in both muscles are smaller than the later ones in the context of motor units and force production.arrow_forward33- a muscle contracts more forcefully if: a- its motor units contracted simultaneously. b- the amount of Ach released at the end plate is increased. c- the frequency of action potential in alpha motor units is decreased. d- A+Barrow_forwardWith the shoulder flexed at 30°, the moment arm of the deltoid muscle is 2.0 cm. Solve for the force exerted by the deltoid muscle at the glenohumeral joint give the following assumptions: The deltoid is the only active muscle at the glenohumeral joint The weight of the humerus is 48 N. The center of gravity of the humerus is located 30 cm from the shoulder center of rotation STATIC EQUILIBRIUM EQUATIONS CONSIDERING ONLY THE DELTOID MUSCLE Fo MA = 18 Cn COR B=55". 0-30° RaF 30 cm FG = 24 Narrow_forward
- Before testing a true 1-RM exercise, why should you allow your client to complete 3 trial repetitions first? Select 2 correct answer(s) To reduce risk of injury To ensure form is correct To fatigue the muscles to a "normal" functional strength To focus on the eccentric and concentric portions of the movementarrow_forward23. The diagram below represents an experimental set-up to demonstrate an aspect during muscle construction. fixed support String Kymograph- Frog muscle Pivot (a) State what would happen if a solution of ATP was added to the muscle. (b) Explain why it is necessary to use muscle from a freshly killed animal. (c) Name the part of the mammal represented by: (1) pivot. (ii) string. (iii) fixed support. 4. The apparatus below were used to investigate a certain physiological process in plants.arrow_forwardSolve the question.arrow_forward
- Assignment 11, Identify the longest muscles'in the body and outline the two major joints it crosses 2. In terms of ions and charges, with a well label diagram describe: • a, Polarization •b. Depolarization • C. Repolarizationarrow_forwardProblem 52 Correctly label the following movements.arrow_forwardGIVE 3 EXERCISES THAT CAN BE CONSIDERED AS A LOCOMOTOR MOVEMENT WITH ABDUCTION AND ADDUCTION MOVEMENT. WHY?arrow_forward
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