Muscular system composition?
Muscle tissue, vessels, nerves, connective tissue.
Muscle tissue — function?
Contract to produce movement.
Three muscle types?
Skeletal, cardiac, smooth.
Smooth muscle — location?
Walls of hollow organs.
Cardiac muscle — shape?
Rectangular with one nucleus.
Skeletal muscle — structure?
Long fibers in fascicles, connective tissue.
Muscle contraction — mechanism?
Sliding filaments of actin and myosin.
Contraction control — process?
Nerve impulses, acetylcholine, calcium.
Muscle pulls on bones via?
Tendons.
Muscle tone — maintained by?
Partial involuntary contractions.
Muscular atony — effect?
Floppy, loss of muscle elasticity.
Muscular atrophy — cause?
Wasting of muscle fibers.
Myalgia — meaning?
Muscle pain or aches.
Fibromyalgia — symptoms?
Widespread pain, fatigue, sleep issues.
Cramp — type of?
Prolonged involuntary muscle spasm.
Fibrositis — inflammation of?
Fibrous connective tissue.
Myositis — involves?
Inflammation of muscle fibers.
Sprain — injury to?
Ligament.
Strain — caused by?
Overstretching or overuse of muscle.
Tetanus — also called?
Lockjaw, caused by bacterial toxin.
Test your knowledge with 10 questions on Muscular System Fundamentals.
1. What is the primary role of cardiac muscle in the cardiovascular system?
2. Who is credited with discovering the nodes of Ranvier, which are important in nerve conduction affecting muscular disorders?
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