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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.
In what ways can modern agriculture threaten the survival of species? Modern agriculture destroys the natural vegetation (e.g. woodland, hedgerows) on a site, which means a nat
Determine the Basic Seven Food Groups - Nutritions? These basic seven food groups are: 1) Cereals and cereal products 2) Pulses (also meat and meat products) 3) Milk and m
Consistently overwatering a potted tomato pla nt will eventually kill it. Using the map, suggest why waterlogged soil results in plant death. O2 cannot reach respiring root cells.
Some relatively simple eukaryotes, like the adder's tongue fern, may have many more chromosomes than a more complex eukaryote, like a mammal. What might this suggest about the size
A lipoprotein is a biochemical assembly which haves both lipids and proteins, bound to the proteins that allow fats to move by the water outside and inside cells. The proteins serv
what is radula?
Q. Explain Spoilage of Sweetened condensed milk? The sweetened condensed milk contains about 8% milk fat, 23% total milk solids and sweetened with the addition of a sweetener,
Q. What is yellow fever? The Yellow fever is a viral infection that occurs mainly in Central Africa and in the Amazon region of South America. It is prevented by vaccination an
How to increase in sodium conductance A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM. The neuron is healthy. At 2 AM, the ph
To show the direction of sprout growth in seeds Soak pumpkin or other large seeds overnight and fasten three of them on needles as shown in the diagram. Fasten single with the
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