Muscular

• A Band - Actin / Myosin
• I Band - Actin
• H zone - Myosin
• Z disc - Boundary of sarcomere
• M line - Myosin
• T tubules - helps to spread the axon potential
• Depolarization - Negative to Positive
• Repolarization - Positive to Negative
• Sarcomere - basic unit of muscle.
• Cardiac - Walls of the heart
• Smooth - Walls of hollow organs (other than the heart)
• Skeletal - Attached to bones or, for some facial muscles, to skin
• Skeletal - Single, very long, cylindrical, with very obvious striations
• Cardiac - Branching chains of cells; uninucleate, striations; intercalated discs
• Smooth - Single, fusiform, uninucleate; no striations
• Smooth - Involuntary; nervous system controls; hormones, chemicals, stretch
• Cardiac - Involuntary; internal heart pacemaker; nervous system controls; hormones
• Skeletal - Voluntary; via nervous system controls
• Skeletal - The speed of contraction is Slow to fast and Rhythmic contraction is No
• Cardiac - The speed of contraction is Slow and Rhythmic contraction is Yes
• Smooth - The speed of contraction is very slow and Rhythmic contraction is Yes in some
• Epimysium - wraps entire muscle
• Muscle Function

  • Body movement
  • Maintenance of posture
  • Respiration
  • Production of body heat
  • Communication
  • Constriction of organs and vessels
  • Heart Beat
  • Stabilize Joints
• Myofibril or fibril - complex organelle composed of bundles of myofillaments
• Actin - Thin myofillament
• Myosin - thick filamment
• Irritability - to receive and respond to a stimulus
• Contractility - to forcibly shorten when adequately stimulated
• Extensibility - ability to muscle fibers to stretch