MasteringA&P with Pearson eText -- ValuePack Access Card -- for Anatomy & Physiology
6th Edition
ISBN: 9780134283388
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 19SAQ
What does it mean when we say that a lever operates at a mechanical disadvantage and what benefits does such a lever system provide?
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Chapter 10 Solutions
MasteringA&P with Pearson eText -- ValuePack Access Card -- for Anatomy & Physiology
Ch. 10.1 - The term prime mover is used in the business world...Ch. 10.2 - What criteria are used in naming each of the...Ch. 10.3 - Prob. 3CYUCh. 10.4 - Which of the three lever systems involved in...Ch. 10.4 - What benefit is provided by a lever that operates...Ch. 10.5 - Prob. 6CYUCh. 10.5 - What muscles would you contract to make a sad...Ch. 10.5 - How can the deltoid muscles both extend and flex...Ch. 10.5 - Which of the thenar muscles does not have an...Ch. 10.5 - Prob. 10CYU
Ch. 10 - A muscle that assists an agonist by causing a like...Ch. 10 - The arrangement of muscle fibers in which the...Ch. 10 - Match the muscle names in column B to the facial...Ch. 10 - The prime mover of inspiration is the (a)...Ch. 10 - The arm muscle that both flexes the elbow and...Ch. 10 - The chewing muscles that protract the mandible and...Ch. 10 - Muscles that depress the hyoid bone and larynx...Ch. 10 - Intrinsic muscles of the back that promote...Ch. 10 - Several muscles act to move and/or stabilize the...Ch. 10 - The quadriceps include all but (a)...Ch. 10 - A prime mover of hip flexion is the (a) rectus...Ch. 10 - The prime mover of hip extension against...Ch. 10 - Muscles that cause plantar flexion include all but...Ch. 10 - In walking, which two lower limb muscles keep the...Ch. 10 - Prob. 15MCCh. 10 - Which of the following is large, deep muscle that...Ch. 10 - Name four criteria used in naming muscles, and...Ch. 10 - Differentiate between the arrangement of elements...Ch. 10 - What does it mean when we say that a lever...Ch. 10 - Which muscles act to propel food down the length...Ch. 10 - Name and describe the action of muscles used to...Ch. 10 - (a) Name the four muscle pairs that act in unison...Ch. 10 - List all six possible movements that can occur at...Ch. 10 - (a) Name two forearm muscles that are powerful...Ch. 10 - Name the muscles usually grouped together as the...Ch. 10 - Name three thigh muscles that help you keep your...Ch. 10 - (a) Name three muscles or muscle groups used as...Ch. 10 - Name two muscles in each of the following...Ch. 10 - In Chapters 7 and 8, you were introduced to Kayla...Ch. 10 - Prob. 2CCSCh. 10 - Prob. 3CCSCh. 10 - Prob. 4CCS
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- What 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_forwardGive a part of the body that uses the 2nd class lever system and; Explain how does the type of the lever system employed by the muscle influence the force it can generate and the load it can overcome?arrow_forwardDiscuss the functions of the different types of levers found in our body. How do these different types of levers make our body more useful. Explain each type of lever, the position of the fulcrum, load, and applied force and give an example of each.arrow_forward
- 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? 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_forwardHow does speed of muscle action affect the following relationships; force-velocity and force-power?arrow_forwardDefine a lever.arrow_forward
- 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?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_forwardConsider the movements of plantar flexion and dorsiflexion. Propose a reason why there are far more (and stronger) muscles involved in plantar flexion?arrow_forward
- Compare and contrast first-, second-, and third-class leversarrow_forwardConsider only the effect of the brachioradialis muscle for these questions: If a weight is held in the hand and the forearm is flexed, whattype of lever system is in action? If the weight is placed on the forearm? Which system can lift more weight, and how far?arrow_forwardAccording to the free-body diagram, which forces act on both teams and rope before motion begins and in which directions?arrow_forward
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