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

Entry of pollen tube into the embryo sac, Entry of Pollen Tube into the Emb...

Entry of Pollen Tube into the Embryo Sac The pollen tube enters the embryo sac through the filiform apparatus of ong of the synergids. Generally, one of the synergids degenera

Ways to adapt to stress, Ways to adapt to stress Now that you know the...

Ways to adapt to stress Now that you know the nature of stress, let us see what type of strategies plants have acquired to adapt to stress. You know that biological functions

Different mechanisms responsible for corneal avascularity, What are the dif...

What are the different mechanisms responsible for corneal avascularity? Various mechanisms responsible for its avascularity are as follows: a) Chemical Theory: I) Role o

Why urea is known to denature proteins, Urea is known to denature proteins ...

Urea is known to denature proteins Based on the structure of urea, how do you think this occurs?

Spoilage of fish, Q. Spoilage of Fish and other Sea Foods Fish and other...

Q. Spoilage of Fish and other Sea Foods Fish and other marine foods are second only to meat and poultry as a staple animal food around the world. India is one of the important f

List the areas of educating a diabetic patient, Q. List the areas of educat...

Q. List the areas of educating a diabetic patient? 1 Self monitoring of Blood -glucose 2 Urine testing 3 Hypoglycaemia 4 Self Administration of Insulin 5 Foot Care

Determine the steps in surgical therapy, Determine the steps in surgical th...

Determine the steps in surgical therapy a) The first step in surgical therapy is to reflect the tissue and degranulate the defect. b) It is followed by exposing and treating

What is the concept of mesonephric, What is the concept of Mesonephric? ...

What is the concept of Mesonephric? Replaces the pronephros during development and is retained as functional kidney in adult fish and amphibians. Formed posterior to pronephros

Orders, order of the phylum protozoa

order of the phylum protozoa

Genetic resources of biodiversity, Q. Genetic resources of biodiversity? ...

Q. Genetic resources of biodiversity? Genetic diversity or the gene pools are important for promoting and ensuring high agricultural yield. Genetic diversity provides crops wit

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