Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Bruxism is a condition in which individuals clench and/or grind their teeth. It often occurs as they sleep, leading to jaw pain and damaged teeth. Which muscles contract during this nocturnal event? What are possible causes of bruxism?
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- Locate and list two different pairs of muscles that act as on the body as agonist/antagonist. (That is, in each pair, one muscle will produce a movement, such as flexion, that the other muscle will undo, and produce extension; abduction/adduction, etc. are other ways that muscle produce opposite actions on the same part of the body).Name two muscles that act as “fixators.” (What are fixators?) What joint or joints are they helping to stabilize?Why is the biceps brachii called a “bicep,” while the triceps brachii is called a “triceps?”What is the difference between a muscle with “longus” as part of its name and a muscle with “brevis” as a part of its name?arrow_forwardWhat are the origin, insertion, and nerve supply for Pronator teres muscle? origin: insertion: nerve supply:arrow_forwardCompare and contrast the Skeletal, Cardiac and Smooth muscles: Microscopic structure Mode of contractionarrow_forward
- A physically active 13-year-old boy is complaining of pain at the posterior heel below the attachment of the achilles tendon. What are the possible reasons for his pain and what is the most likely cause? Explain your reasoning. What is the anatomical significance of the location of his pain? Does his age make a difference in how he should be managed? Are there any risks in ignoring the problem? Are there other locations in the body in which similar conditions occur?arrow_forwardWhat are the consequences of long term inactivity of musclesarrow_forwardWhich 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 abovearrow_forward
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