Muscle Physiology

Block II — Muscular Physiology

How it begins

Skeletal muscle represents approximately 40% of adult body mass and is responsible for all voluntary motility, posture, and heat generation. It is made up of multinucleated cells called muscle fibers (myocytes), which can measure several centimeters in length. Understanding how it works is essential for clinical practice: from anesthesiology to neurology,…

What it covers

1. Block II Muscular Physiology
2. · 3.1 Structure of the Sarcomere
3. · 3.2 Excitation-Contraction Coupling (EEC)
4. · 3.3 Sliding Filament Theory
5. · 3.4 Cross Bridges Cycle
6. · 3.5 Types of Muscle Fibers
7. · 3.6 Types of Muscle Contraction
8. · 3.7 Length-Stress Relationship
9. · 3.8 Force-Velocity Relationship
10. · 3.9 Summation and Tetanus
11. · 3.10 Sources of Muscle Energy
12. · 3.11 Muscle Fatigue
13. · 3.12 Motor Unit
14. · 4.1 Smooth Muscle: Structure
15. · 4.2 Excitation-Contraction Coupling in Smooth Muscle
16. · 4.3 Nervous and Hormonal Control of Smooth Muscle
17. · 4.4 Unitary Smooth Muscle vs. Multiunit
18. · 4.5 Myogenic Tone
19. · 4.6 Cardiac Muscle: Unique Properties
20. · 4.7 Excitation-Contraction Coupling in Cardiac Muscle
21. · 4.8 Frank-Starling Mechanism
22. · 4.9 Inotropic Regulation