Study

For exam study, not clinical practice. Always follow your clinical instructors and current guidelines.

PHS-101 route
Unit 6 · Lesson 3 of 3 12 min

Mechanics and Energetics of Muscle Contraction

How a muscle grades its strength, where it gets its energy, and why the heart can never cramp up.

What this unit covers

Unit 6: Muscle Physiology

  1. 1 The Neuromuscular Junction and the Motor UnitA single puff of acetylcholine turns a nerve's message into a muscle's movement. · 10 min
  2. 2 Sliding Filament TheoryMuscles shorten without a single filament getting shorter. The trick is sliding. · 12 min
  3. 3 Mechanics and Energetics of Muscle ContractionHow a muscle grades its strength, where it gets its energy, and why the heart can never cramp up. · 12 min