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Oscar Quiroz Period 5 Muscular - Coggle Diagram
Oscar Quiroz
Period 5
Muscular
Skeletal muscles
The skeletal muscles of the muscular system are the attachments,because the muscles can attach to the bone in two places which are the origin and the insertion that are the movable bone and the immovable bone and the levels of the skeletal muscle are the muscles(organs) and there are hundreds of thousands, the fascicle is the disease bundle of muscle, the muscle fiber cell is the fiber that is elongated multinucleate cell.
Sacromere
The Sacromere is the smallest contractile unit of the muscle fibers and they are individual sacromeres aligned end to end along the myofibrill.
3 types of muscles and functions
The 3 types of muscles are the skeletal, cardiac and smooth, and there main functions are that the skeletal is the muscle attached to the bone, allows movement and supports the body, the cardiac is the muscle that generates heat and the smooth is the unitary muscle of the walls of the hollow organs.
Major functions of the muscular system
The major functions of the muscular system are to generate heat,maintain posture, produce movement such as walking, jogging.
Neuromuscular junction
The events of the Neuromuscluar Junction is that when the AP arrives in the axon terminal, then the voltage gated calcium channels open, allowing calcium to enter the motor neuron and as the calcium enters, it causes the release of ACh in the neurotransmitter in the synaptic cleft.The ACh diffuses across the ACh receptors on the sacrolemma then the ACh binds the receptors, open the gates, allowing Na+ resulting end plate so then Acetylcholines degrades ACh.
Muscle coverings
The muscle coverings of the bones is the epimysium, perimysium, and endomysium and what each does is that the epimysium is the dense irregular connective tissue surrounding the entire muscle, the perimysium is fibrous connective tissue surrounding fascicles that are also known as muscle fibers and the endomysium is the arelor connective tissue that surrouns each muscle fiber.
Sliding filament theory
The sliding filament theory is contraction, because its the activation of the cross bridges that generate force.The contraction ends the cross bridges when it becomes inactive.The thin filaments slide past the thick filaments which causes action and myosin to overlap.
Action potential in a muscle fiber
The muscle action in the muscle fiber is that for the muscle contraction when the myosin head attaches itself to the actin thin filament site, it pivots and pulls the thin filament toward the M line following that is when ATP attaches to the myosin head the cross bridge detaches itself from the myosin head and then the energy from the hydeolysis of the ATP cocks the myosin back into it's original position.
Disorders associated
The disorders associated in the neuromuscluar junction was myasthenia gravis was a disease that was caused by drooping upper eyelids,difficulty swallowing,talking and generalized muscle weakness.
Another disorder was the rigor mortis and it occurs after 3-4 hours of death,muscles begin to stiffen, ATP is needed for cross bridges detachment and it results in the myosin head staying bound to actin which causes state of contraction.