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Three types of muscle | Circulatory system physiology | NCLEX-RN | Khan Academy

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Big Guns: The Muscular System - CrashCourse Biology #31

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stiffening of the joints and muscles of a body a few hours after death, usually lasting from one to four days.

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Automaticity is defined as the ability of heart cells to spontaneously depolarize and generate an action potential.

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Excitability is the ability to respond to a stimulus, which may be delivered from a motor neuron or a hormone. Extensibility is the ability of a muscle to be stretched or extended. Elasticity is the ability to a muscle to return to its original length when relaxed.

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Elasticity is the ability to recoil or bounce back to the muscle's original length after being stretched.

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Extensibility is the ability of a muscle to be stretched.

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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.

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Calcium's positive molecule is important to the transmission of nerve impulses to the muscle fiber via its neurotransmitter triggering release at the junction between the nerves. Inside the muscle, calcium facilitates the interaction between actin and myosin during contractions

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A superfamily of motor proteins is 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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a protein that forms (together with myosin) the contractile filaments of muscle cells, and is also involved in motion in other types of cell.

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

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a muscle which is connected to the skeleton to form part of the mechanical system which moves the limbs and other parts of the body.

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The primary function of the cardiac muscle is to regulate the functioning of the heart by the relaxation and contraction of the heart muscles. The cardiac muscles function as involuntary muscles. The cardiac muscles are also involved in the movement or locomotion.

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muscle tissue in which the contractile fibrils are not highly ordered, occurring in the gut and other internal organs and not under voluntary control.

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1. a condition marked by intermittent muscular spasms, caused by malfunction of the parathyroid glands and a consequent deficiency of calcium.

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the prolonged contraction of a muscle caused by rapidly repeated 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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a sudden involuntary muscular contraction or convulsive movement.

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Muscle fatigue is defined as a decrease in maximal force or power production in response to contractile activity.

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1)Skeletal muscles contract exerting forces on the tendons

2)Tendons then pull on the bones causing joint movement

3) Generating body heat

4) Movement of substances within the body

e.g. peristalsis

5) Postural muscles stabilize and maintain body positions

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a thin casing of connective tissue that surrounds and holds every organ, blood vessel, bone, nerve fiber, and muscle in place.

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a flexible but inelastic cord of strong fibrous collagen tissue attaching a muscle to a bone.