1 / 21

The Muscular System

This overview covers the essential processes of skeletal muscle contraction, detailing the neuromuscular junction, the role of actin and myosin, and the mechanisms of excitation-contraction coupling. The sliding filament theory is explained, highlighting the interaction of thin and thick filaments. Additionally, it addresses muscle relaxation, the importance of ATP, and conditions such as polio, botulism, and myasthenia gravis, along with their symptoms and treatments. This comprehensive insight into the muscular system is vital for understanding muscle function and related disorders.

boris-ross
Télécharger la présentation

The Muscular System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Muscular System Part II Skeletal Muscle Contraction

  2. Introduction • Muscles receive… • Actin and myosin… • Sarcomeres… • Muscle fibers… • Pulls on…

  3. Fig. 9.8

  4. Neuromuscular Junction • Each skeletal muscle fiber ___________ connected to a neuron • Neurons (Motor Neurons) 1. 2. 3. • Neurotransmitters 1. 2. 3. 4.

  5. Neuromuscular Junction • Synapse 1. 2. • Ach receptors 1. 2.

  6. Fig. 9.8

  7. Fig. 9.9

  8. Fig. 9.8

  9. Stimulus for Contraction • Muscle impulse 1. 2.

  10. Excitation Contraction Coupling • Muscle impulse causes … • Ca2+ binds to … • Binding sites … • Actin can…

  11. Fig. 9.10

  12. The Sliding Filament Theory • Sarcomeres… • Thin and thick filaments … • Slide past one another 1. 2. 3.

  13. Fig. 9.11

  14. Fig. 9.11

  15. Cross-Bridge Cycling • Sarcomere shortening 1. 2. 3. • ATP is required 1. 2. • Cross- bridge binding repeats 1. 2.

  16. Fig. 9.10

  17. Relaxation • Nerve impulse… • Acetylcholinesterase 1. 2. • Calcium … • Myosin… • Tropomyosin … *ATP … • Rigor mortis

  18. Fig. 9.10

  19. Diseases of the Muscular System • Polio 1. 2. • Botulism 1. 2.

  20. Clin. App. 9.1: Myasthenia Gravis 1. 2. 3. Symptoms a. b. 4. Treatment a. b. c. d.

More Related