Properties of receptors, Biology

Assignment Help:

Properties of Receptors

The receptors collect information concerning the change in the environment such as temperature, illumination etc. In lower animals, sensory perception is mediated by undifferentiated nerve endings. These are their sense organs. Though, the receptors or sense organs become more specialized and elaborate. Such type of elaborate sense organs are present even in Cnidaria, and they become much more complicated in higher animals. You have already seen that sensory receptors exchange one form of energy into another, electrical. So all receptors are transducers. Even one molecule of odour substance is frequently able of evoking a small electrical disturbance in a chemoreceptor. This local current is generally the result of amplification too, and is propagated along the axon of the sensory receptor. So the receptor is extremely sensitive to change in the environment. You have to also note that each sensory receptor responds to just only one kind of stimulus. For example, chemo-receptors will respond to only chemical stimuli, but not to mechanical or light stimuli. Another significant fact you have to bear in mind is that the frequency of nerve impulse increases with strength of the stimulus. In other words, information that is concerning intensity of the stimulus is transmitted by frequency code. Thus the code of information travels as impulse in axons of all receptors, be it mechanoreceptor, photoreceptor or chemoreceptor. But because each kind of receptor is sensitive to one type of stimulus only and because these axons carry impulses to specific regions of the central nervous system, brain correctly interprets the information reaching it. Depending on the type of stimulus, receptors may be divided into mechanoreceptors, chemo receptors and photoreceptors.


Related Discussions:- Properties of receptors

What is criminal law, What is criminal law? Criminal law: A crime ...

What is criminal law? Criminal law: A crime is an offence against society that accepted behaviours and is illegal by law. These all persons accused are prosecuted through

What is linkage, What is linkage? Two genes are said to be under linkag...

What is linkage? Two genes are said to be under linkage, or linked, when they reside in the same chromosome. For instance, the research of the human genome discovered that t

Explain adverse effects of amprenavir, Explain Adverse effects of Amprenavi...

Explain Adverse effects of Amprenavir  The most common adverse effects have been nausea, vomiting (especially in combination with zidovudine), perioral paresthesias and rash (J

What do you mean by digestive enzymes, Q. Besides the pancreatic juice in t...

Q. Besides the pancreatic juice in the intestine there is the releasing of the enteric juice that contains digestive enzymes too. What are these enzymes and which type of molecule

Explain process to maintain the quality of frying oil, Maintaining the qual...

Maintaining the quality of frying oil  As frying continues, the level of oil in the fryer depletes. There are two beneficial frying fat quality factors affected during the fryi

Explain the kidney structure in human biology, Explain the Kidney Structure...

Explain the Kidney Structure in human biology? The body's two kidneys are located in the small of the back, one behind the stomach and one behind the liver. Each kidney is comp

Normal color vision- color blindness, If a color blind man marries a woman ...

If a color blind man marries a woman pure for normal color vision, it's probable that one of the below situations may result. Is it possible that a) All the children would be

What is the average incubation period of chagas disease, Q. What is the ave...

Q. What is the average incubation period of Chagas' disease? What are some signs and symptoms of the acute phase of Chagas' disease? The Chagas' disease may or may not present

Branches of Biology, Is pathology a subspecialty of zoology or botany?

Is pathology a subspecialty of zoology or botany?

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