Chemoreceptors, Biology

Assignment Help:

Chemoreceptors

These are receptors included in perception of chemical stimuli. You will see that there are three kinds of Chemoreceptors among metazoans:

 i) Those concerned along with general chemical sense perceived by undifferentiated nerve endings or unspecified receptors. These are distributed all over the surface of the body and are common in between lower animals such as cnidarians, worms and molluscs. The most primitive type of chemoreceptor and results in escape reaction of the animal.

ii) Chemotactile sense perceived through contact Chemoreceptors involving contact with molecules in dilute solution; they are generally present in large numbers in special regions of the body. In mammals these are located on the tongue and we call the sensation taste or gustation. But in Octopus they are concentrated around the rim of the suckers, and in insects they are present on mouthparts and in flies, they are found in abundance as well on tarsal segment of foot. So one may say that the fly tastes with their fed.

iii) Olfaction involves distant chemical sense and is the most sensitive type of chemical sense. Olfactory receptors are capable of perceiving molecules of very low concentration in air and we usually call it smell. They are distributed in high density on the antennae of insects. The combined electrical recordings of the antennal nerve generated by the odors on the olfactory receptors of the antennae are termed electroantennogram. Specific insects can recognize their mates even at a distance of a couple of kilometers, from the odour (pheromone) molecules they emit.


Related Discussions:- Chemoreceptors

Explain about the neuro trauma, Explain about the Neuro Trauma? Neuro o...

Explain about the Neuro Trauma? Neuro or head trauma includes brain injury, skull fractures, extraparenchymal or internal brain haemorrhage, Brain injury can be divided into th

Define oxidised starch, Oxidised starch Oxidised starch finds a number ...

Oxidised starch Oxidised starch finds a number of uses in the food industry where a neutral tasting, low viscosity 'body builder' is required as in lemon curd manufacture, in s

Pup, hey what is puperty

hey what is puperty

Show the natural selection of taxonomist, Q. Show the Natural selection of ...

Q. Show the Natural selection of taxonomist? Natural selection associated with successful reproduction maintains a basic similarity of the reproductive feature of flowers, frui

Define requirements of protein during surgery, Define Requirements of Prote...

Define Requirements of Protein during Surgery? Negative nitrogen balance is the most common nutritional deficiency related to surgery. Reserves of protein in the tissues and pl

Evolutionary advantage of the occurrence of sperm cells, What is the evolut...

What is the evolutionary advantage of the occurrence of sperm cells and larval stage in the life cycle of sponges? The sexual reproduction in sponges, in addition to contributi

Blood salvage and bloodless open-heart surgery, Blood Salvage and Bloodless...

Blood Salvage and Bloodless Open-heart Surgery: At the time of cardio pulmonary bypass, cardiomony suckers suck blood from the chambers or the heart and pericardium back into the

What are the biological troubles, Q What are the biological troubles that m...

Q What are the biological troubles that molluscs face due to their soft body? Because molluscs have a soft body they are further fragile. They also have more complexity to supp

Reproductive organs, Reproductive Organs In several metazoans, gonads ...

Reproductive Organs In several metazoans, gonads are well-defined. Testes and ovaries take up dissimilar shapes and anatomical dispositions. In cases of certain hermaphrodites

What is a vesicle, What is a vesicle? A vesicle is a relatively minute ...

What is a vesicle? A vesicle is a relatively minute intracellular, membrane-enclosed sac that keeps or transports substances

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