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Rigor mortis is due to a biochemical change in the muscles that occurs several hours after death, though the time of its onset after death depends on the ambient temperature. ... Without ATP, myosin molecules adhere to actin filaments and the muscles become rigid.

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Automaticity is the property of cardiac cells to generate spontaneous action potentials. Spontaneous activity is the result of diastolic depolarization caused by a net inward current during phase 4 of the action potential, which progressively brings the membrane potential to threshold.

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Tissue elasticity is the ability to stretch a muscle to reach its full range of movement without restriction. Different types of tissues can be found within the body including soft tissues and connective tissues. Tissues often become restrictive and inelastic resulting in an increase in muscle tightness and pain.

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Tissue extensibility relates to tissue flexibility, which is related to the strength and power that your muscles are able to generate. If you have healthy, extensible, flexible muscle, you are going to be able to perform much better than if your muscles are scarred down, hard, and inflexible.

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Excitability is the ability to respond to a stimulus, which may be delivered from a motor neuron or a hormone.

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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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Calcium affects muscles by regulating contractions. This includes regulating the heart beating because the heart is a muscle that pumps blood. Calcium is released when a nerve stimulates a muscle. Calcium also plays a role in the complex process of blood coagulation (blood clotting).

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Myosins are a superfamily of motor proteins best known for their roles in muscle contraction 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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Actin, protein that is an important contributor to the contractile property of muscle and other cells. It exists in two forms: G-actin (monomeric globular actin) and F-actin (polymeric fibrous actin), the form involved in muscle contraction. Muscle: Actin And Myosin.

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The sliding filament model describes the process used by muscles to contract. It is a cycle of repetitive events that causes actin and myosin myofilaments to slide over each other, contracting the sarcomere and generating tension in the muscle.

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Skeletal muscles comprise 30 to 40% of your total body mass. They're the muscles that connect to your bones and allow you to perform a wide range of movements and functions. Skeletal muscles are voluntary, meaning you control how and when they work

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Cardiac muscle tissue is one of the three types of muscle tissue in your body. ... Cardiac muscle tissue is only found in your heart, where it performs coordinated contractions that allow your heart to pump blood through your circulatory system.

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Tetany is a condition that causes involuntary muscle contractions and changes in your brain cells. Some people don't have any symptoms, but it can be life-threatening for others. Symptoms of tetany include: Muscle spasms

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Smooth muscle is found in the walls of hollow organs like your intestines and stomach. Smooth muscles are involved in many 'housekeeping' functions of the body. The muscular walls of your intestines contract to push food through your body.

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a state of sustained contraction of a muscle during which the muscle does not relax to its initial length or tension, induced by a rapid succession of stimuli.

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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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Muscle spasms are involuntary contractions of a muscle, typically harmless and temporary, but can be painful. Muscle spasms can have causes that aren't due to underlying disease. Examples include extreme fatigue from overexertion, not using the muscle enough, low magnesium, or low potassium.

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Muscle weakness is commonly due to lack of exercise, ageing, muscle injury or pregnancy. It can also occur with long-term conditions such as diabetes or heart disease. There are many other possible causes, which include stroke, multiple sclerosis, depression, fibromyalgia and chronic fatigue syndrome

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Muscles help with movement. Muscles of the body wall support the internal organs. They also cushion the body's internal organs. It helps with blood circulation and generating heat.

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Fascia is a thin casing of connective tissue that surrounds and holds every organ, blood vessel, bone, nerve fiber and muscle in place. The tissue does more than provide internal structure; fascia has nerves that make it almost as sensitive as skin. When stressed, it tightens up.

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A tendon is a fibrous connective tissue which attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure.