Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134807355
Author: Marieb
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 26RQ
What class of lever system do the following activities describe? (a) The soleus muscle plantar flexes the foot, (b) The triceps brachii is strained while doing pushups.
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What class of lever is described by the following activities: (1) the soleus plantar flexing the foot; (2) the deltoid abducting the arm; (3) the triceps brachii extending the forearm during push-ups?
Three orders of levers are recognized: I. Fulcrum (pivot) between power and weight. II. Weight between power and fulcrum. III. Power between fulcrum and weight. What order of lever is involved in the action of the gastrocnemius muscle of the frog? Of man? Of the triceps in the fore limb? Of the biceps in the fore limb?
What is an example of multiple lever types in the body during the same movement?
Chapter 10 Solutions
Human Anatomy & Physiology (11th Edition)
Ch. 10 - Prob. 1RQCh. 10 - 2. The arrangement of muscle fibers in which the...Ch. 10 - 3. Match the muscle names in column B to the...Ch. 10 - 4. The prime mover of inspiration is the (a)...Ch. 10 - 5. The arm muscle that both flexes the elbow and...Ch. 10 - 6. The chewing muscles that protract the mandible...Ch. 10 - 7. Muscles that depress the hyoid bone and larynx...Ch. 10 - 8. Intrinsic muscles of the back that promote...Ch. 10 - Prob. 9RQCh. 10 - Aprime mover of thigh flexion is the (a)rectus...
Ch. 10 - The prime mover of thigh extension against...Ch. 10 - Prob. 12RQCh. 10 - Prob. 13RQCh. 10 - 17. Name four criteria used in naming muscles, and...Ch. 10 - 18. Differentiate between the arrangement of...Ch. 10 - 20. Which muscles act to propel food down the...Ch. 10 - Prob. 15RQCh. 10 - Prob. 19RQCh. 10 - Prob. 20RQCh. 10 - As Kendra's coach watched her sail over the high...Ch. 10 - 24. (a) Name two forearm muscles that are powerful...Ch. 10 - Prob. 21RQCh. 10 - Prob. 24RQCh. 10 - Prob. 22RQCh. 10 - 3. Mr. Ahmadi, an out-of-shape 45-year-old man,...Ch. 10 - What class of lever system do the following...Ch. 10 - 45-Year-Old Female with Motor Nerve Damage
In...Ch. 10 - 45-Year-Old Female with Motor Nerve Damage
In...Ch. 10 - 45-Year-Old Female with Motor Nerve Damage In...Ch. 10 - 45-Year-Old Female with Motor Nerve Damage In...Ch. 10 - 45-Year-Old Female with Motor Nerve Damage In...Ch. 10 - 45-Year-Old Female with Motor Nerve Damage
In...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- You are trying to jump from a crouched position (knee fully flexed), 1) list all of the muscles at the knee and hip that would move you from this position to in the air. 2) using the principle of active insufficiency please also outline the timing of the muscle force for the knee and the hip (i.e. what muscles provide the most force early in the movement, when the knee and hip are both more flexed, and what muscles provide the most force later in the movement, when the hip and knee are both more extended)arrow_forwardWhat benefit is provided by a lever that operates at a mechanical advantage?arrow_forwardDifferentiate between the arrangement of elements (load, fulcrum, and effort) in first-, second-, and third-class levers.arrow_forward
- Which of the three lever systems involved in muscle mechanics would be the fastest lever—first-, second-, or third-class?arrow_forwardWhat are two factors which allow the gastrocnemius and soleus muscles to generate greater plantar flexion torque than all the other muscles capable of plantarflexion?arrow_forwardIf your biceps brachii muscle attaches to your forearm 2 inches below your elbow, the distance from the elbow to the palm of your hand is 18 inches, and you lift a 20 pound weight, how much pull must your muscle exert to achieve elbow flexion? If your biceps brachii muscle attaches to your forearm 2 inches below your elbow, the distance from the elbow to the palm of your hand is 18 inches, and you lift a 20 pound weight, how much pull must your muscle exert to achieve elbow flexion? hhharrow_forward
- Define a lever.arrow_forwardWhat type of lever is the vastus medialis? Support your answer with a free body diagram. The vasti muscles are used both for sit-to-stand AND stand-to-sit movements. Which of these two tasks represents a concentric contraction and which represents an eccentric contraction? Which muscle (vastus lateralis or medialis) do you think is more important for doing a slow, controlled stand-to-sit transition? If you witnessed your grandfather "plopping" (doing an uncontrolled sit) into a chair, would you recommend giving him eccentric or concentric strengthening exercises for his vasti muscles? Justify your answer.arrow_forwardWhy can you lift a larger load when your elbow is slightly flexed and your biceps muscle is at an intermediate length than you can when your elbow is fully extended?arrow_forward
- What difference does foot plant or no foot plant make to the functions of the gluteus medius and tensor fascia lata muscles?arrow_forwardName the three types of lever systems and indicate the arrangement of effort, fulcrum, and load in each. Also note the advantages of each type of lever system.arrow_forwardWhere are the effort, fulcrum, and resistance in the act of dorsiflexion? What class of lever does the foot act as during dorsiflexion? Would you expect it to have a mechanical advantage greater or less than 1.0? Why?arrow_forward
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