What are the major muscles in the human body and their functions?
The major muscles in the human body include the biceps (arm flexion), triceps (arm extension), deltoids (shoulder movement), pectorals (chest movement), rectus abdominis (abdomen flexion), quadriceps (leg extension), hamstrings (leg flexion), gluteals (hip movement), and latissimus dorsi (back movement). These muscles facilitate movement, posture, and stability.
How do muscles work together to enable movement in the human body?
Muscles work together through coordinated contractions and relaxations, with agonist muscles creating movement while antagonist muscles oppose it, ensuring balance and control. Synergistic muscles assist the agonists, and stabilizers support body positioning, enabling efficient and smooth movement across joints.
What are the different types of muscle tissue found in the human body and their characteristics?
The human body has three types of muscle tissue: skeletal, cardiac, and smooth. Skeletal muscles are voluntary and striated, allowing movement by attaching to bones. Cardiac muscle, found in the heart, is involuntary and striated, facilitating heartbeat. Smooth muscle is involuntary and non-striated, controlling movements in hollow organs.
What are common disorders or diseases associated with the muscular system?
Common disorders or diseases associated with the muscular system include muscular dystrophy, myasthenia gravis, polymyositis, and tendonitis. Other conditions include fibromyalgia and muscle strains or sprains. These disorders can result in muscle weakness, pain, and limitations in movement. Proper diagnosis and treatment are essential for managing symptoms and improving quality of life.
How does exercise impact the muscular system and promote muscle growth?
Exercise impacts the muscular system by causing micro-tears in muscle fibers, which triggers repair and growth through protein synthesis. Resistance training and progressive overload stimulate hypertrophy, enhancing muscle size and strength. Additionally, exercise increases blood flow and nutrient delivery, supporting muscle recovery and development.