Human Anatomy & Physiology Plus Mastering A&P with Pearson eText -- Access Card Package (11th Edition) (What's New in Anatomy & Physiology)
11th Edition
ISBN: 9780134756363
Author: Elaine N. Marieb, Katja Hoehn
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 2CCS
Children with Muscular Disorders
You're doing a clinical rotation with Dr. Barr, a world-renowned specialist in children's muscle disorders. On your first day, you meet three patients with the same probable diagnosis—nemaline myopathy. Jodi, age 2, has a waddling walk and difficulty standing; Linda. 6 months, has pneumonia associated with problems swallowing; and Tom, 12, has progressive weakness with foot drop and difficulty walking.
“This kind of variation is not surprising.” says Dr. Barr. “A mutation in one of 11 different genes related to thin filaments can cause nemaline myopathy, so you’d expect to see it present in different ways.”
Dr. Barr has scheduled all three children for a muscle biopsy (surgical removal of a small piece of muscle tissue for examination). He explains to you. “We’re going to use these biopsies for two things. First, we're going to look for the characteristic histology of nemaline myopathy. Second, we're going to test for malignant hyperthermia. It's not associated with nemaline myopathy but is associated with a different myopathy that has a similar presentation.”
2. What does troponin do?
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Chapter 9 Solutions
Human Anatomy & Physiology Plus Mastering A&P with Pearson eText -- Access Card Package (11th Edition) (What's New in Anatomy & Physiology)
Ch. 9 - Prob. 1RQCh. 9 - 2. A fascicle is a (a) muscle, (b) bundle of...Ch. 9 - 3. Thick and thin myofilaments have different...Ch. 9 - 4. The function of the T tubules in muscle...Ch. 9 - 5. The sites where the motor nerve impulse is...Ch. 9 - 6. Contraction elicited by a single brief stimulus...Ch. 9 - 7. A smooth, sustained contraction resulting from...Ch. 9 - 8. Characteristics of isometric contractions...Ch. 9 - 9. During muscle contraction, ATP is provided by...Ch. 9 - 10. The neurotransmitter released by somatic motor...
Ch. 9 - 11. The ions that enter the skeletal muscle cell...Ch. 9 - 12. Myoglobin has a special function in muscle...Ch. 9 - 13. Aerobic exercise results in all of the...Ch. 9 - 14. The smooth muscle type found in the walls of...Ch. 9 - 15. Name and describe the four special functional...Ch. 9 - 16. Distinguish between (a) direct and indirect...Ch. 9 - 17. (a) Describe the structure of a sarcomere and...Ch. 9 - 18. What is the importance of acetylcholinesterase...Ch. 9 - 19. Explain how a slight (but smooth) contraction...Ch. 9 - 20. Explain what is meant by the term...Ch. 9 - 21. Define and draw a motor unit.
Ch. 9 - 23. True or false: Most muscles contain a...Ch. 9 - 24. Describe some cause(s) of muscle fatigue and...Ch. 9 - 26. Smooth muscle has some unique properties, such...Ch. 9 - 2. When a suicide victim was found, the coroner...Ch. 9 - 3. Muscle-relaxing drugs are administered to a...Ch. 9 - Children with Muscular Disorders You're doing a...Ch. 9 - Children with Muscular Disorders
You're doing a...Ch. 9 - Children with Muscular Disorders
You're doing a...Ch. 9 - Children with Muscular Disorders
You're doing a...Ch. 9 - Children with Muscular Disorders You're doing a...Ch. 9 - Children with Muscular Disorders You're doing a...Ch. 9 - Children with Muscular Disorders
You're doing a...
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- What are the side effects of Muscular dystrophies?arrow_forward3) Paula is a scientist who is developing a drug called Fremtol that will be used to treat muscle spasms. This drug acts on specific skeletal muscles to (1) block the release of Ca2+ ions from the sarcoplasmic reticulum, (2) inhibit the pivoting ability of the myosin heads of the thick filaments, and (3) block the production of ATP by the mitochondria in skeletal muscles. By using this drug, contraction of certain skeletal muscle fibers is reduced, which keeps those muscles from producing spasms. In the above scenario, Fremtol’s effect of blocking muscle mitochondrial ATP production would result in the inability of the muscle to make ATP from ___________. a. creatine phosphate b. anaerobic glycolysis c. aerobic respiration d. All of the above e. None of the abovearrow_forwardWhat event occurs immediately before the movement of tropomyosin? Initiation of the power stroke Cross bridge formation Active sites on actin are revealed Release of calcium from terminal cisternae Troponin changes shapearrow_forward
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