Please enable JavaScript.
Coggle requires JavaScript to display documents.
Eduardo Aguiar Period 5 Muscular System - Coggle Diagram
Eduardo Aguiar Period 5 Muscular System
Names of all the Skeletal Muscles
pectinus
pectoralis major
palmaris longus
pronator teres
orbicularis oculi
iliopsoas
orbicularis oris
masseter
rectus abdominis
serratus anterior
sternocleidomastoid
sternohyoid
frontalis(epicranius frontal belly)
temporalis
flexor Carpi ulnaris
tensor fasciae latae
deltoid
trapezius
brachialis
triceps brachii
bicep brachii
zygomaticus
brachioradialis
adductor longus
external obliques
fibularis longus
tibialis anterior
extensor digitorum longus
soleus
gastrocnemius
sartorius
gracilis
rectus femoris
iliotibial tract
vastus medialis
vastus lateralis
types of muscles and their functions
Cardiac Muscle
: situated in the vicinity of the heart; involuntary movement; accountable for the heart's contractility and, consequently, the pumping activity
Skeletal Muscle
: located in and surrounding bones; contracts to move voluntarily maintain the proper alignment and posture of the body, control body temperature, store nutrients, and stabilize joints
Smooth Muscle:
found in hollow organs; involuntary movement; maintain blood pressure and flow
Neuromuscular Junction:
location where motor neuron meets with muscle fiber:
Nerve Terminal
Mitochondrion
Axon*
Synaptic Vesicle
Muscle fibers
ACh receptors
Action Potential in a Muscle Fiber
: The action potential resulting from the depolarization of muscle cells' endplate membrane raises the concentration of calcium ions in muscle plasma.
Major Functions of the Muscular System
Generate heat with contraction
Help maintain posture and body position
Stabilizes Joints
Responsible for movement: locomotion and manipulation
sarcomere
*A Band
: darker regions
*H Zone
: lighter region in middle of A Band. the m line bisects H zone vertically
I Band
: light regions, Z disc: coin shaped sheet of light I band
*Myofilaments
: myosin(thick), Actin(thin)
Sliding Filament Theory of Muscle Contraction
: Myosin filaments move along actin filaments with cross bridges using the energy from ATP. Actin filaments are drawn closer together as a result.
Muscle Coverings (connective tissue coverings)
Perimysium
: a continuous layer of collagenous connective tissue, also creates muscle fascicles by separating the Skeletal muscle tissues
Endomysium
: a delicate network of connective tissue, surrounding individual muscle fibers and contains the vessels and nerves that supply the muscle fibers
Epimysium
: a thick connective tissue layer, composed of coarse collagen fibers in the prteoglycan matrix
Disorders associated with the Muscular System
Fibromyalgia
: muscle pain; unknown cause; muscle pain; a massage can cure some
Myotosis
: an inflammation of the muscle; due to an infection; causes muscle weakness; cured by antibiotics
Muscular Dystrophy
: atrophy and muscle; genetics; weakness; loss of strength; no cure
Cerebral Palsy
: static paralysis causing muscle weakness; caused by a brain injury or just randomly; mild to severe effects of paralysis; no cure
Myasthenia Gravis
: a neurpmuscular disorder which blocks neurotransmitters; age is a cause; causes muscle weakness; no cure