chapter 6 muscular system

Overview of Muscles

• Definition of Muscles:

  • Muscles are the motors that create active movements and help stabilize the skeleton.

  • Bones function as levers, muscles provide the force, and joints act as the axis.

Muscle Contraction Mechanism

• Role of the Central Nervous System:

  • Muscle contraction is initiated by the central nervous system (CNS).

  • Analogy of Sensory Feedback:

    • Touching something hot sends a sensory impulse to the brain, resulting in a contraction of the muscle to withdraw your hand.

  • Involves sensory and motor responses through the motor neurons.

Study of Kinesiology

• Complexity of Human Body:

  • The human body is not a simple machine; it is intricate and complex.