Muscular System Project

The Muscular system

Hailey Phillips

miscroscopic anatomy

sliding filament theory

index

neuromuscular junction

muscle man

Multiple sclerosis

Microscopic anatomy

Sliding Filament Theory

* The first stage is muscle activation. In this stage, the motor nerve stimulates an impulse to pass down the neuron to the neuromuscular junction. The neuron stimulates the sacroplasmic reticulum to release a lot of calcium into the muscle cell.* The second stage is the contracting of the muscle. When calcium flow throught the muscle cell to bind with troponin to let actin and myosin to bind. Actin and myosin cross bridges bind using ATP for energy to contract. * Stage three is the recharging stage. In this stage is when the ATP is re-synthesized to allow actin and myosin to keep their binding state. * Finally, stage four is relaxation. This occurs when the nerve is no longer stimulated. After this, calcium gets pumped back into the sarcoplasmic reticulum to break the actin and myosin connection. Actin and myosin then return to their regular state causing muscle relaxation.

muscle man

neuromuscular junction

NMJ Video

This is my video where I explain the NMJ

multiple sclerosis under the microscope

conditioned vs deconditioned muscles

multiple sclerosis

Multiple slerosis is a disease of the central nervous system that interferes with messages within the brain and the body. MS causes the messages in the central nervous system to be altered or stopped entirely. People with MS experience muscle weakness due to the damage of their nerve fibers. These specific nerve fibers help to control the muscles so without the complete ability of the nerve fibers, it can be difficult to perform certain tasks. Also, overtime, people with multiple sclerosis experience the inability to use their muscles, causing them to be deconditioned.