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Rigor Mortis and Muscle Contraction | Muscular System

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Cardiac Electro Physiology Part II [ PacemakerPotential Automaticity CardiacContraction ]

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Jump Rope | Anatomical Analysis + Active Muscles

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Extensibility is the ability of a muscle to be streched. For example, let's reconsider our elbow flexing motion we discussed earlier. In order to be able to flex the elbow, the elbow extensor muscles must extend in order to allow flexion to occur. Lack of extensibility is known as spasticity.

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Contractility is the ability of muscle cells to forcefully shorten. Contractility allows muscle tissue to pull on its attachment points and shorten with force. ( muscles can only pull, never push.)

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When calcium binds to troponin, the troponin changes shape, removing tropomyosin from the binding sites. The sarcoplasmic reticulum stores calcium ions, which it releases when a muscle cell is stimulated.

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Myosins is best known as roles in muscle contractions and in a wide range of other motility processes in eukaryotes. They are ATP-dependent and responsible for actin based motility.

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a protein that forms the contractile filaments of muscle cells. It's also involved in motion in other types of cell.

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The sliding filament theory is the mechanism of muscle contraction based on muscle proteins that slide past each other to generate movement. The sliding filament theory is a short explanation of the mechanism that underlies muscle contraction.

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A process in which force is generated within involuntary skeletal muscle tissue, resulting in a change in muscle geometry. Involuntary skeletal muscle is skeletal muscle that is not under conscious control.

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Cardiac muscle cells are located in the walls of the heart, appear striped (striated), and are under involuntary controlunder involuntary control.

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Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations.

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Tetany is a disorder of increased neuronal excitability usually associated with hypocalcemia.

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A serious bacterial infection that causes painful muscle spasms and can lead to death.

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Clonic spasms refer to alternating involuntary muscular contraction and relaxation in quick succession. Tonic spasms are rigid muscle contractions that last a period of time.

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Involuntary contractions of a muscle, typically harmless and temporary, but can be painful.

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Muscle fatigue is the decline in ability of muscles to generate force. It can be a result of vigorous exercise but abnormal fatigue may be caused by barriers to or interference with the different stages of muscle contraction.

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5 Basic Functions of The Muscular System 

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5 Basic Functions of The Muscular System 

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1. Movement. Skeletal muscles pull on the bones causing movements at the joints.
2. Support. Muscles of the body wall support the internal organs.
3. Protection
4. Heat generation
5. Blood circulation

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fascia has nerves that make it almost as sensitive as skin. When stressed, it tightens up.

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A tendon is a cord of strong, flexible tissue. Tendons connect your muscles to your bones. They help prevent muscle injury by absorbing some of the impact your muscles take when you run, jump or do other movements.