What is rigor mortis, Biology

Assignment Help:

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.


Related Discussions:- What is rigor mortis

Light harvesting in green plants, Sunlight is absorbed by chlorophyll molec...

Sunlight is absorbed by chlorophyll molecules.  Chlorophyll is a porphyrin in that nitrogen atoms are coordinated to a magnesium ion instance for it is a magnesium porphyrin.  This

Protozoan flagellates, discus the protozoan flagellates of less medical imp...

discus the protozoan flagellates of less medical importance ,outlining their development stages,normal habitants and morphological characteristics

Producers - biotic components, Producers - Biotic Components Producers...

Producers - Biotic Components Producers also called autotrophs are largely green plants that can make food from simple inorganic materials. Food refers to complex organic comp

Specify the term in detail - swim bladder, Specify the term in detail - Swi...

Specify the term in detail - Swim bladder. Found in bony fish, this gas-filled chamber is used to main neutral buoyancy. Oxygen in blood is added or removed as required. Swim b

Into which classes are mollusc divided, Into which classes are mollusc divi...

Into which classes are mollusc divided? What are some representing beings of each class? The phylum Mollusca is separated into five major classes: pelecypods, or bivalves (Pele

Bacteria, wine turns sour beause of the action of which bacteria? aerobic o...

wine turns sour beause of the action of which bacteria? aerobic or anerobic?

State about intra oral periapical radiographs, Intra Oral Periapical Radiog...

Intra Oral Periapical Radiographs These can either be taken conventionally or by the help of RVG (RADIO VISUO GRAPHY).  RVG offers certain benefits over conventional X-Rays suc

Winter stratification - thermal stratification, Winter Stratification - The...

Winter Stratification - Thermal stratification During extremes of winter the surface layer of the lake freezes or attains a temperature close to 0° Celsius. Under these condit

Phylum porifera, What are general characteristics of phylum porifera?

What are general characteristics of phylum porifera?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd