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Q. What is rigor mortis?
Dead bodies are at first limp. Many hours after death, skeletal muscles undergo a partial contraction that fixes the joints. This condition, called rigor mortis, may continue for 72 hours or more. When neurons signal living muscle fibres to contract, they do so with a neurotransmitter which is received at the surface of the muscle fiber. Signal makes the fiber open calcium ion channels and it is the calcium which causes the contraction. Muscle then removes the calcium in two ways: it stores some in its mitochondria and it pumps out the rest. When a body dies, stored calcium leaks and calcium pumps no longer function. Excess calcium causes the actin and myosin filaments of muscle fibers to remain linked, stiffening whole body until the muscles begin to decompose.
Characteristics of Metazoa The unicellular protozoans are highly versatile and successful organisms that show remarkable organization and division of labour within the confine
Define Contractile Protein - biological functions of protein? These proteins take part in contractile processes like muscle proteins also those found in other cells and tissues
Palliative Procedures i) This consists of enlarging the existing for a men ovale by putting a baloon through the defect (baloon septostomy) so that interatrial mixing of blo
Obesity a health hazard: The factors of obesity are complex. Obesity is due to over eating and excess of energy intake. The obese child when grows up will be a target
why do we get severe leg pains when the internal bone is cracked?
What are venous vessels, veins and venules? Venous vessels are each blood vessel that carries blood from the tissues to the heart. Veins and venules are venous vessels. Venules
Define Interaction of niacin with other Nutrients? You may recall reading earlier that trypotophan present in dietary proteins is converted to niacin. There is an interdepend
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