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

How to measure a quality of water sample, various parameters which are used...

various parameters which are used in water quality measurement

Explain beginning and the end of the third interphase period, Q. What are t...

Q. What are the events that mark the beginning and the end of the third interphase period? What happens in the cell in this period? The third interphase period is the G2, It be

Deficiency diseases-selenium and vitamin e deficiency, Selenium and vitamin...

Selenium and vitamin E deficiency Selenium is an essential micro-mineral required for various physiological functions and for immunity against a variety of diseases. It is an i

What is the general chemical equation of photosynthesis, What is the genera...

What is the general chemical equation of photosynthesis? Why doesn't that equation clearly show the real origin of the molecular oxygen liberated? The general equation of photo

Describe the factors that affect cardiac, Describe the factors that affect ...

Describe the factors that affect cardiac output in a female athlete who is speed skating toward the finish line in an Olympic race.

Single vessel disease, Single Vessel Disease (SVD) :  They do well on medi...

Single Vessel Disease (SVD) :  They do well on medical treatment or with angioplasty. However if proximal LAD is significantly blocked and LIMA can be used as a conduit, surgery g

Describe ps with atrial right to left shunt in details, Describe PS With At...

Describe PS With Atrial Right To Left shunt in details? This group of patients has cyanosis due to light to left shunt at atrial level. The diminution in PA pressure and PBF ma

Define points to remember regarding to food processing, Define Points to Re...

Define Points to Remember regarding to Food Processing? 1. Conversion of raw materials and ingredients into acceptable consumer products is referred to food processing, which c

What is gastrulation, Q. What is gastrulation? How during gastrulation are ...

Q. What is gastrulation? How during gastrulation are the first two germ layers formed? What are these germ layers? Gastrulation is the process through which a portion of the bl

Which are the phases of the menstrual cycle, Which are the phases of the me...

Which are the phases of the menstrual cycle? The menstrual cycle is separated into two main phases: the follicular (or menstrual) phase and the luteal (or secretory) phase.

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