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Anthony Jimenez Period.5 Muscular system - Coggle Diagram
Anthony Jimenez
Period.5
Muscular system
Sarcomere
(smallest contractile unit of muscle fiber)
Contains A band with half on an i band at each end.
Area between Z discs
Muscle disorders
Firomyalgia
Muscle pain
Myasthenia Gravis
Neuromuscular disorder
Muscular dystrophy
Muscle weakness and atrophy
Cerebral palsy
Spastic paralysis causing muscularf weakness
Myositis
Inflamation of muscle
Muscle coverings
Every muscle and muscle fiber is covered in connective tissue
Action potential in muscle fiber
(caused by change in electrical charge)
3 steps
Deplorization
Generation and propagation of an action potential(AP)
Repolarization
Muscle fibers cannot be stimulated for a specific amount of time, until repolariation is complete.
Generation of end plate potential
ACh released from motor neuron binds to ACh receptors on sarcolemma
Major functions of muscular tissue
4 major functions
Maintain posture and body position
Stabilize joints
Produce movement: Locomotion and manipulation
Generate heat as they contract
Neuromuscular junction
Has 6 events
calcium entry caues release of ACh
ACh diffuses across to ACh receptors
Voltage gated calcium channel opens
ACh binding to receptors, opens gates, allowing na+ to enter
AP arrives at axxon terminal
Acetlycholinesterase degrades ACh
Sliding filiament theory
of muscle contraction
That during contraction, thin filaments slide past thick filaments, causing actin and mysoin to overlap more.
-Neither thick nor thin filaments change length, just overlap more
3 types of muscles and their functions
Cardiac
located in the walls of the heart
Smooth
Urinary muscle in walls of
hollow visceral organs
Skeletal
Attached to bones or to skin
Skeletal muscles
Posterior
arm
Triceps brachii
Brachialis
forearm
Extensor carpi radialis longus
Flexor carpi ulnaris
racchioradialis
Extesor carpi ulnaris
Extensor digitorum
back
teres minor
Latissimus dorsi
teres major
Rhomboid major
Infraspinatus
thigh
Adductor magnus
Gracils
Biceps femoris
Semitendinosus
semimembranosus
Shoulder
Deltoid
leg
Soleus
Gastrocnemius
Fibularis longus
neck
Trapezius
head
Occipitalis
Anterior
arm
Biceps brachii
Brachialis
forearm
Brachioradialis
Flexor carpi radialis
Pronator teres
Palmaris longus
Thorax
pectoralis major
serratus anterior
Pectoralis minor
Intercostals
abdomen
Rectus abdominis
external oblique
internal oblique
Shoulder
Deltoid
thigh
vastus lateralis
vastus medialis
Rectus femoris
tensor fascia lata
sartorious
adductor longus
Gracilis
Neck
Stermohyoid
sternocleidomastoid
Platysma
Trapezius
leg
Gastrocnemius
Soleus
Facial
zygomaticus
orbicularis oris
obicularis oculi
masseter
Frontalis
Temporalis