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This question is straight out of the physiology and anatomyy book clinical #7 pg. 219 lol if you look up rigor mortis itll give you a better answer but this is what i have hope it helps... when a body dies stored calcium leaks and calcium pumps no longer funtion, so the exessive calcium causes actin and myosin filaments of the muscle fibers to remain linked, which stiffens the whole body until the muscle begins to decompose
From wikipedia.org:
After death, respiration in organisms ceases to occur, depleting the corpse of oxygen used in the making of ATP. ATP is no longer provided to operate the SERCA pumps in the membrane of the sarcoplasmic reticulum, which pump calcium ions into the terminal cisternae.[1] This causes calcium ions to diffuse from the area of higher concentration (in the terminal cisternae and extracellular fluid) to an area of lower concentration (in the sarcomere), binding with troponin and allowing for crossbridging to occur between myosin and actin proteins. [2]Unlike normal muscle contractions, the body is unable to complete the cycle and release the coupling between the myosin and actin, creating a perpetual state of muscular contraction, until the breakdown of muscle tissue by digestive enzymes during decomposition.[1][3]
Muscle rigidity after death is termed "rigor mortis" and it is a result of of calcium leaking from dead muscle cells...this ion results in contraction of the muscle simply "by default," but since they are dead there is no further progression or uncontraction...the muscles remain contracted and therefore we see rigor in corpses.
What else can I help you with?
Rigor mortis occurs at death due to a lack of?
Rigor mortis occurs at death due to the lack of adenosine triphosphate (ATP) in the muscles, which is needed for muscle contraction. When ATP production ceases, the muscles become stiff and rigid, leading to the characteristic stiffening of the body after death.
How does heart attack affects organism?
Besides being a four chambered pump, the heart's muscles also need a blood supply. If the blood supply to the heart ceases, the heart will become traumatised and stop pumping (beating), so causing the body to collapse and die.
Use the word ceases in a sentence?
When the world dies, life Ceases. Who ceases the movement of animals?
Why do baseball becomes soft and this ceases to be bouncy after sometime?
When they get hit by the bat, the materials will become loose. After many times of this occurring, the ball will become soft.
Why baseball becomes soft and this ceases to be bouncy after sometime?
Being hit by a bat causes the materials to become loose and it has less bounce.
When was Never Ceases to Amaze Me created?
Never Ceases to Amaze Me was created in 1983.
What is a simile for the word ceases?
The flow of time ceases like a frozen river.
What is the meaning of when the reason of the law ceases the law ceases?
An example would be:It is illegal to shoot passenger pigeons.Passenger pigeons are extinct.Therefore, the law ceases to have any affect.
When a person dies rigor mortis sets in as atp synthesis ceases why does the lack of atp in muscle cells cause the muscles to become rigid?
The answer is that muscles use ATP to relax, allowing the next part of the contraction process to occur. After death, a lack of energy causes a failure of muscle relaxation on a microsopic level and so a stiffness. Rigor Mortis is caused by lack of ATP which causes tight binding of myosin 2 heads to actin. This doesn't last long, however, as the muscles quickly decompose and become soft again.
What is 'never ceases to'?
To "cease" is to stop, so "it never ceases to amaze me" means "it never stops amazing me".
Why does rigor mortis affect the muscles and not the limbs?
Rigor mortis affects the muscles throughout the body, including the limbs, due to biochemical changes that occur after death. When the body ceases to produce ATP, the energy molecule required for muscle relaxation, myosin heads remain attached to actin filaments, causing the muscles to stiffen. This process is not limited to limbs but affects all skeletal muscles, leading to a generalized rigidity. Thus, rigor mortis manifests in the muscles themselves, which include those in the limbs.
What is ceases?
to put an end to
