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

Spirochetosis (tick fever), S p ir ochetosis (tick fever) This is di...

S p ir ochetosis (tick fever) This is disease of young birds under poor management mostly reared as backyard poultry caused by a spiral bacterium, Borrelia anserina and tr

Explain ozone shield, Explain ozone shield? Name two gases that can ca...

Explain ozone shield? Name two gases that can cause damage to this shield. Give one harmful effect of this damage each on plants and animals.

Cerebrum, what term is used to indicate its grooves?

what term is used to indicate its grooves?

Sausage classification - meat products, S a u s a g e classification ...

S a u s a g e classification Classification                                      Examples Cooked-smoked                               Frankfurters, Bologna, Mortadel

Can the heat capacity of water be taken small or large, Q. Can the heat cap...

Q. Can the heat capacity of water be taken small or large ? What is the biological importance of that characteristic? Ans. From Thermology it is define that the quantit

What is polysaccharides, Polysaccharides are vast chains of sugar units joi...

Polysaccharides are vast chains of sugar units joined together.  The chains should be branched or linear depending on the polysaccharide.  In  animals,  excess glucose is stored as

Cell Division, What is the difference between Mitosis and Meosis?

What is the difference between Mitosis and Meosis?

Protostomes, differences between acoelomate,coelomate and pseudocoelomate

differences between acoelomate,coelomate and pseudocoelomate

What is paediatric clinical literature, What is paediatric clinical literat...

What is paediatric clinical literature The paediatric clinical literature has expanded greatly in its coverage of the wide variety of medical circumstances that can negatively

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