Please enable JavaScript.
Coggle requires JavaScript to display documents.
Muscular System Gavin Arias Per.1 - Coggle Diagram
Muscular System Gavin Arias Per.1
Major Functions of the Muscular System
Circulation-circulates blood flow and heat throughout the body
Posture-maintains the body's posture
Movement-provides movement of the body
Sarcomere
Z line-boundary of the sarcomere
A band-center of sarcomere containing thick and thin filaments
Myosin-thick filament
I band-part of sarcomere containing thin filament
Actin-thin filament
H zone-center of A band where thin and thick filaments don't overlap
Action Potential in Muscle Fiber
Contraction-when the muscle activates; actin constricts, flexing the muscle
Relaxation-when the muscle relaxes; actin moves back to its resting position
Skeletal Muscles
Deltoid
Extensor carpi radialis
Brachioradialis
Extensor carpi ulnaris
Flexor carpi ulnaris
Gluteus maximus
Gluteus medius
Infraspinatus
Latissimus dorsi
Occipitalis
Rhomboid major
Sternocleidomastoid
Teres major
Trapezius
Tricep brachii
Bicep femoris
Adductor magnus
Gastrocnemius
Gracilis
Soleus
Disorders Associated with the Muscular System
Myasthenia Gravis-neuromuscular disorder that blocks neurotransmitters
Cerebral Palsy-spastic paralysis causing muscle weakness
Fibromyalgia-muscle pain
Myositis-inflammation of the muscle
Muscular Dystrophy-muscle weakness and atrophy
Neuromuscular Junction
Motor End Plate-the section of the motor neuron that sends signals into the muscle
Synaptic Cleft-the area of space between the motor end plate and the motor neuron
Motor Neuron Axon-the neuron that attaches to the motor end plate from the neuron to control the muscle's impulses
Synaptic Vesicles-pockets within the motor neuron containing acetylcholine
Muscle Fiber-contains the myofibril(sarcomere)
Muscle Coverings
Perimysium-muscle covering of eache fasicle
Endomysium-muscle covering of each muscle fiber
Epimysium-outermost muscle covering
Sliding Filament Theory
When the thin filament(actin) slides and overlaps each other on both sides causing a muscle contraction
3 Types of Muscles
Cardiac-found only in heart, branches, connected by intercalated disks, striated, and involuntary
Skeletal-makes up muscles found in bones, long and cylindrical, striated, many nuclei, and is voluntary
Smooth-spindle-shaped with 1 central nucleus, lacks striations, and is involuntary
Skeletal Muscles #2
Bicep brachii
Brachialis
Semimembranosus
External obliques
Semitendinosus
Frontalis
Fibularis longus
Iliopsoas
Masseter
Orbicularis oris
Orbicularis oculi
Palmaris longus
Pectinus
Pectoralis major
Pronator teres
Rectus abdominis
Serratus anterior
Sternocleidomastoid
Sternohyoid
Temporalis
Tensor fasciae latae
Zygomaticus