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

Define counter stain - staining technique, Define Counter Stain - Staining ...

Define Counter Stain - Staining Technique? Finally, the smear is counter stained with a simple basic dye different in colour from crystal violet. Safranin is the most commonly

What are the hydrophobic molecules, Q. What are the hydrophobic molecules (...

Q. What are the hydrophobic molecules (or hydrophobic molecular regions)? What are the hydrophilic molecules? How can they be characterized in relation to their polarity? Hydro

Investigations process of constrictive pericarditis, Q. Investigations proc...

Q. Investigations process of constrictive pericarditis? Electrocardiogram Low voltage complexes can occur. Left atrial enlargement may be seen. Atrial fibrillation occu

Biochemical methods of detecting tumors, Based on your knowledge of neoplas...

Based on your knowledge of neoplasia, discuss biochemical methods of detecting tumors, and imaging characteristics (in your particular imaging modality) that suggest malignancy. Ex

Agro industrial-enrichment of soil, Enrichment of soil Indirect provis...

Enrichment of soil Indirect provision of minerals to grazing livestock includes mineral fertilization of  pasture and altering soil pH, however this may not be always feasible

HIV VIRUS, what is the structure of hiv virus?

what is the structure of hiv virus?

What is packaging, Q. What is packaging? What is packaging? Packaging...

Q. What is packaging? What is packaging? Packaging means a coordinated system of preparation of goods (in this case, foods) for shipment, distribution, storage and

What is the plant transpiration, What is the plant transpiration? What are ...

What is the plant transpiration? What are the two major types of plant transpiration process? Which of them is more important in volume? The Plant Transpiration is the loss of

Class of subphylum uniramia - symphyla, Class of Subphylum Uniramia - Symph...

Class of Subphylum Uniramia - Symphyla Symphyla is yet other small myriapodous group that includes around 160 described species. These are also soil living forms and live in l

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