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Anatomy & Physiology - part 5

Một bệnh nhân đang gặp khó khăn trong việc di chuyển lưỡi của mình. Một bị chèn ép dây thần kinh sọ có thể gây ra vấn đề này. Những dây thần kinh này sẽ được Câu trả lời là: hypoglossal thần kinh 2. Một abducens thần kinh bị hư hỏng có thể gây ra vấn đề làm những gì hoạt động? | 148 CliffsStudySolver Anatomy Physiology Figure 8-4 Select muscles of the torso. Example Problems Use the description of the muscle location from Table 8-4 to identify the muscles on Figure 8-4. 1. Muscle a is the. answer sternocleidomastoid 2. Muscle b is the. answer pectoralis major Chapter 8 The Muscular System 149 3. Muscle c is the. answer rectus abdominis 4. Muscle d is the. answer external oblique 5. Muscle e is the. answer trapezius 6. Muscle f is the. answer latissimus dorsi 7. Muscle g is the. answer gluteus maximus Work Problems Identify the muscle being described. Use the muscles that are identified in Tables 8-1 through 8-4. 1. This muscle is located on the frontal bone. 2. This muscle is located in the center of the anterior antebrachium. 3. This muscle is located on the crus crural region . 4. This muscle is located on the sura sural region . 5. This muscle is located lateral to the gluteal cleft. 6. This is a rather large muscle located on the lateral side of the elbow and radius. 7. This muscle is located in the center of the anterior thigh. 8. When this muscle contracts it will cause the arm to move laterally. 9. This muscle is located inferior to the trapezius. 10. This muscle is located lateral to the rectus abdominis. Worked Solutions 1. frontalis 2. palmaris longus 3. tibialis anterior 150 CliffsStudySolver Anatomy Physiology 4. gastrocnemius 5. gluteus maximus 6. brachioradialis 7. rectus femoris 8. deltoid 9. latissimus dorsi 10. external oblique Muscle Structure In order to understand how muscles contract one must understand the structure of muscles. The following information starts with the macroscopic level of the muscle and ends with the microscopic level. Consider the biceps brachii as an example. The entire main body of the muscle is made of several muscle fasciculi. Each fasciculus is made of muscle fibers a muscle fiber is the same as a muscle cell . Each muscle fiber is made of myofibrils. The myofibrils are protein molecules actin