The excitability of different tissues varies widely. Some tissues are highly excitable whereas others are dull. While considering the excitability of a tissue two factors are to be considered: (a) The strength of the current used, and (b) The duration of the current flowing through the tissue. These two factors bear an inverse relation. The […]
Chronaxie and Rheobase of Various Tissues | Muscles | Humans | Biology
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Factors Affecting Excitability & Contractility | Muscles | Humans | Biology
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The following factors affect excitability and contractility and therefore alter in various ways, the nature of the simple muscle curve: Factor # 1. Strength and Duration of Stimuli: For stimulation to occur, two factors are necessary—a minimum strength and an adequate duration of the stimulus. Chronaxie, which includes both these factors is the measure of […]
Processes of Chemical Changes in Muscles | Humans | Biology
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Following chemical changes take place during contraction in the anaerobic and aerobic phases in human body. 1. Glycolysis and Oxidative Breakdown: This process involves many separate enzymes and different intermediates. The end products are pyruvic or lactic acid. The first step in the liberation of energy for contraction is the breakdown of glycogen in the […]
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