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Muscular System Isabella Vasquez P. 7 - Coggle Diagram
Muscular System Isabella Vasquez P. 7
Major functions of the muscular system
The major functions of the macular system mobility, stability, posture, circulation, respiration, digestion, urination, childbirth, vision, organ protection, and temperature regulation.
3 types of muscles & their functions
Skeletal muscle - it specializes tissue that is attached to bones and allows movement.
Smooth muscle - involuntary muscles - found in organs or organ system such as the digestive or respiratory system.
Cardiac muscle - involuntary muscle - those muscles form the walls of the heart and contracts to circulate the blood.
Names of all the skeletal muscles
temporalis (closes jaw)
Zygomaticus (raises lateral corners of mouth)
Orbicularis oris (closes lips)
Platysima (Tenses skin of neck)
Masseter (prime mover of jaw closure)
Orbicularis oculi (closes eyes)
Frontalis (raises the eyebrows)
pectoralis major, intercostal, rectus abdominis, external oblique, illiopsoas, sartorius, pectineus, vastus lateralis, fibularis longus, soleus, gluteus maximus, triceps brachii, biceps brachii , deltoid
Sarcomere
Is the basic contractile unit of muscle fiber. Sarcomere is composed of two main protein filaments actin - myosin which are the active structures responsible for muscular contraction.
Neuromuscular junction
The neuromuscular junction is a specialized synapse between a motor neuron nerve terminal and it's muscle fiber that are responsible for converting electrical impulses generated by the motor neuron into electrical activity in the muscle fibers.
Sliding filament theory of muscle contraction
The sliding filament theory is the mechanism of muscle contraction based on muscle proteins that slide past each other to generate movement. The sliding filament theory is a widely accepted explanation of the mechanism that underlies muscle contraction.
Action potential in a muscle fiber
An action potential is a special type of electrical signals that can travel along a cell membrane as a wave. Sodium ions enter the muscle fiber, and an action potential rapidly spreads along the entire membrane to initiate excitation contraction coupling.
Muscle coverings
each muscle is surrounded by a connective tissue sheath called the epimysium. Fascia, connective tissue outside the epimysium, surrounds and separates the muscles.