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a postmortem change resulting in the stiffening of the body muscles due to chemical changes in their myofibrils

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the ability to spontaneously depolarize and generate an action potential

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the ability to respond to a stimulus via generation of an electrical pulse which causes contraction of muscle cells

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the ability to stretch a muscle to reach its full range of movement without restriction

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the ability for muscle cells to be stretched or extended

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-the ability of muscle cells to shorten

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-enables the interaction between actin and myosin during contractions

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-generates force that produces muscle cell contractions that allows muscle movement
-works with actin

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-actin filaments are aligned and myosin proteins generate forces on the filaments to support muscle contraction (muscle cells)
-active in muscular contraction, cellular movement, and maintenance of cell shape
-works with myosin

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-the mechanism of muscle contraction based on muscle proteins that slide past each other to generate movement
-is the most widely accepted explanation of muscle contractions

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-Voluntary muscles
-attaches to the bones and make body motions possible
-Striated, tubular, multinucleated fibers
-attached to the skeleton

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Cardiac Muscle (Heart Muscle or Myocardium)

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Cardiac Muscle (Heart Muscle or Myocardium)

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-Involuntary muscles
-cause the mechanical motion of pumping blood throughout the rest of the body
-forms the muscular walls of the heart

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-Involuntary muscles
-located in the walls of internal organs
-narrow, tapered, and rod- shape
(digestive tract, blood vessels, and ducts leading to glands)

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-caused by the involuntary contraction of muscles that usually results from low calcium levels in the blood
-symptoms: numbness around the mouth, muscle cramps, and paresthesias affecting the hands and fee

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-An infection caused by the bacteria called Clostridium Tetani
-This bacteria produces a toxin which causes the body to have painful muscle contractions and could lead to death

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Clonic Spasm- alternating involuntary muscular contraction and relaxation in quick succession

Tonic Spasm- brief, stiff, and painful muscle contractions that last a decent period of time

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Sudden, violent, involuntary contraction of one or more muscles

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A symptom that causes your muscles to not perform as well over time which can be caused by exhaustion after strenuous activity or exercise

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-Muscles hold the body erect
-Make movement possible
-Move food through the digestive system
-Muscle movement aids the flow of blood through veins
-Muscle actions moves fluid through the ducts and tubes associated with other body systems
-Generate body heat

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A thin casing or sheet of connective tissue that covers, supports, and separates muscles or groups of muscles in order to allow movement

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A sheet of fibrous connective tissue that connects muscle to bone
(This is an Achilles tendon which connects the calf muscle to the heel bone)