Information processing in sensory neuron, Biology

Assignment Help:

Information Processing in Sensory Neuron

You have previously seen that the sensory neuron transmits the information it receives, as an action potential along its axon. We describe them an impulse. The intensity of the stimulus is transmitted along the nerve fibre through changing frequency. A stimulus of greater intensity will result in greater frequency of firing along the axon, one of lower intensity will comprise lower frequency. Let us see what happens when one of the first pair of legs of a cockroach is touched. Stimulation of the mechanoreceptors of the first leg of a cockroach by touch will be perform by the axon to neurons in the first thoracic ganglion where it makes connection, in simplest case, through synapse, along with a motor neuron directly. In more complicated cases, the motor neuron may be informed by one or more association neurons. These neurons may be receiving at similar time a number of other stimuli from a large number of presynaptic fibres. Some of them might be excitatory and some of them may be inhibitory, So carrying opposing instructions.

This type of connection also enables higher centers of the central nervous system to exert control over the action, so that, if unsuitable, it can withhold from exercising the reflex, like running away. Thus the postsynaptic cell receiving frequently contradictory messages, decides whether to fire or not, on the basis of all the instructions it receives. In case the neuron 'decides' to fire, the stimulus can result in the release of neurotransmitter at its terminals making the concerned muscle to contract, causing movement of the leg and the animal run away. This type of receptor-effector loop is the lowest level of information processing via central nervous system and is called a reflex. In lower animals this constitutes their whole behavior. However, in higher animals particularly in those like cephalopods and insects, with a well developed central nervous system, varying degrees of higher levels of control are exerted on the reflexes along with increasing hierarchy of the central nervous system exerting its influence. These animals comprise larger and complex type of brains by invertebrate standards; their large eyes and other sense organs feed a range of stimuli into the brain. There are various motor centres in the central nervous system finally controlling activities through various motor centres. We must not forget that most animals have as well the capacity of learning. Learning provides the animal with a record of information on which it can draw and act. The memory gives this information and the central nervous system can select the motor activity best suited for the animal's life.


Related Discussions:- Information processing in sensory neuron

Microbodies, Microbodies Peroxisomes and glyoxysomes are microbodies fo...

Microbodies Peroxisomes and glyoxysomes are microbodies formed from ER which superficially resemble the lysosomes. Peroxisomes are spherical bodies limited by a single membrane

What are the symptom of short bowel syndrome, Q. What are the Symptom of sh...

Q. What are the Symptom of short bowel syndrome? Diarrhoea is the main symptom of short bowel syndrome. Other symptoms include: • Anorexia • Steatorrhoea • Heart bum a

How are gases exchanged in sponges, Q. How are gases exchanged in sponges? ...

Q. How are gases exchanged in sponges? The gas exchange in sponges happens by diffusion from the exterior to the cells that absorb molecular oxygen and liberate carbon dioxide.

Blood, how to know what type of blood are?

how to know what type of blood are?

What are heterotrophic beings, What are autotrophic beings? What are hetero...

What are autotrophic beings? What are heterotrophic beings? Autotrophic beings are those that can make their own food, i.e., that make organic material from inorganic compound

Viral diseases, How do measles and HIV virus affects the bodies organisms

How do measles and HIV virus affects the bodies organisms

Determine the principles of suturing, Determine the Principles of suturing ...

Determine the Principles of suturing These are universal principles which are applicable in all aspects not just implant surgery: 1. Sutures should always be inserted throug

What is salty taste, Q. What is Salty taste? Various ions both cations ...

Q. What is Salty taste? Various ions both cations and anions are responsible for the salty taste. These include: K (Potassium), Na (Sodium), Li (Lithium), Cl, Br (Bromine), I (

Why is it important for chromosomes to be condensed, Why is it important fo...

Why is it important for chromosomes to be condensed during mitosis and decondensed during interphase? During mitosis the major problem to be solved is the correct separation of

Factors responsible for transboundary diseases, F a c t o r s respons...

F a c t o r s responsible for transboundary diseases Factors that affect the entry, establishment and spread of animal diseases include globalization; human population gr

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