chapter12a Muscles

chapter12a Muscles - Chapter 12a Muscles About this Chapter...

Info iconThis preview shows pages 1–18. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 12a Muscles About this Chapter Skeletal muscle Mechanics of body movement Smooth muscle Cardiac muscle Three Types of Muscle Figure 12-1a Nucleus Muscle fiber (cell) Striations (a) Skeletal muscle Three Types of Muscle Figure 12-1b Muscle fiber Nucleus Striations (b) Cardiac muscle Intercalated disk Three Types of Muscle Figure 12-1c Muscle fiber Nucleus (c) Smooth muscle Skeletal Muscle Usually attached to bones by tendons Origin : closest to the trunk Insertion : more distal Flexor : brings bones together Extensor : moves bones away Antagonistic muscle groups: flexor-extensor pairs Antagonistic Muscle Groups Figure 12-2a (a) Flexion Biceps muscle contracts (flexor) Triceps muscle relaxes Antagonistic Muscle Groups Figure 12-2b (b) Extension Triceps muscle contracts (extensor) Biceps muscle relaxes Organization of Skeletal Muscle Figure 12-3a (1 of 2) Skeletal muscle Muscle fascicle: bundle of fibers Muscle fiber Connective tissue Connective tissue Tendon Nerve and blood vessels Nucleus (a) Organization of Skeletal Muscle Figure 12-3a (2 of 2) Ultrastructure of Muscle Figure 12-3b-f T-tubules (c) (d) (b) Sarcoplasmic reticulum Sarcolemma Mitochondria Myofibril Myofibril Thick filament Thin filament A band Z disk Z disk (f) Z disk I band M line H zone Z disk Sarcomere Thin filaments Tropomyosin Troponin Actin chain G-actin molecule Myosin tail Myosin heads Myosin molecule Thick filaments Nucleus Hinge region (e) Titin Nebulin Titin M line Myosin crossbridges M line ULTRASTRUCTURE OF MUSCLE ANATOMY SUMMARY Figure 12-3b Ultrastructure of Muscle T-tubules Sarcoplasmic reticulum Sarcolemma Mitochondria Myofibril Thick filament Thin filament Nucleus ULTRASTRUCTURE OF MUSCLE (b) Figure 12-3c Ultrastructure of Muscle (c) Myofibril A band Z disk I band M line H zone Z disk Sarcomere Figure 12-3d Ultrastructure of Muscle (d) Z disk Z disk Titin M line Myosin crossbridges Figure 12-3e Ultrastructure of Muscle (e) Myosin tail Myosin heads Myosin molecule Thick filaments Hinge region M line Figure 12-3f Ultrastructure of Muscle (f) Thin filaments Tropomyosin Troponin Actin chain G-actin molecule Titin Nebulin Ultrastructure of Muscle Figure 12-3c-f (c) (d) Myofibril A band Z disk Z disk (f) Z disk I band...
View Full Document

Page1 / 45

chapter12a Muscles - Chapter 12a Muscles About this Chapter...

This preview shows document pages 1 - 18. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online