About This Chapter
Muscular System Physiology - Chapter Summary
Within the human body are bones, fluids, organs, and tissues, all working together to perform various functions vital to life. These lessons focus on muscle physiology, and our instructors will analyze different types of tissues, their functions, and how they help the body perform movements.
You'll find that each lesson is short in length, but highly informative. Our instructors pack these lessons with the most important information you need, including major terms, definitions, and explanations of key concepts. Go through every lesson of the chapter to gain a deeper understanding of this topic, or pick and choose specific lessons that you need to review. After you have a stronger grasp on muscle physiology, you will possess the skills to:
- Describe the smooth, cardiac, and skeletal muscle tissues
- Identify the functions of the major skeletal muscle
- Analyze layers and connective tissue in the organization of skeletal muscle
- Check out the sliding filaments and sarcomere in muscular contraction
- Define excitation-contraction coupling, cross-bridge formation, and related concepts
- Examine the physiology, structure, and function of the neuromuscular junction
- Learn about relationships between length and tension
- Point out muscle tension, wave summation, and muscle twitch
- Offer examples about muscle tension caused by motor unit summation
- Review isotonic and isometric contraction
- Show ATP synthesis within muscle metabolism
- Determine the functions and types of skeletal muscle fibers
1. Major Skeletal Muscle Functions
Did you know that skeletal muscle does more than just move our body parts? This lesson describes how skeletal muscles are used for movement, posture, swallowing, defecation, urination and homeostasis.
2. How Muscular Contraction Causes Articulation: Definition & Types
Skeletal muscle contraction causes all types of movement. Movement at our joints is referred to as articulation. All articulation is described in reference to the anatomical position, and most articulations are identified in opposite pairs. This lesson identifies and describes the major articulations of the human body.
3. The Sarcomere and Sliding Filaments in Muscular Contraction: Definition and Structures
Did you know that a sarcomere is the fundamental functional unit of striated muscle? This lesson describes the thick and thin filaments of a sarcomere and how they interact with each other to cause sarcomere shortening and muscular contraction.
4. Muscular Contraction: Cross-Bridge Formation
Did you know that muscles contract as a result of cross-bridge formation between actin and myosin? This lesson describes the stages of cross-bridge cycling and how this results in sarcomere shortening and muscular contraction.
5. The Neuromuscular Junction: Function, Structure & Physiology
A neuromuscular junction is a synapse between a motor neuron and skeletal muscle. This lesson describes the events of synaptic transmission leading to contraction of skeletal muscle. Myasthenia gravis is described as a neuromuscular disease.
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Other chapters within the Biology 105: Anatomy & Physiology course
- Anatomy and Physiology Overview
- Chemical and Cellular Biology
- Tissue Biology
- Integumentary System
- Skeletal System
- Muscular System Anatomy
- Introduction to the Human Nervous System
- The Central Nervous System in the Human Body
- The Peripheral Nervous System
- The Five Senses
- The Endocrine System
- The Human Cardiovascular System - Blood & Heart
- The Human Cardiovascular System - Vessels & Circulation
- The Lymphatic System & Immunity
- Human Respiratory System
- Digestive System
- Urinary System
- Male and Female Reproductive Systems
- Studying for Biology 105