Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
In today's global economy, goods flow from one country to another like never before, allowing the natural capital from one country to be utilized in many other countries. Some have
Q What is the fundamental structure of the HIV virus? What is the function of the glycoproteins of its envelope? HIV is an RNA virus in its core there are two strands of RNA an
Disorder of Parathyroid Function: The disorders of parathyroid function may either lead to increased production or decreased production of parathormone. Hypoparathyroid
Q. What is the first polar body? How different is it from the oocyte II? In oogenesis the oogonium differentiates into oocyte I (2n) and this cell enters meiosis and after fini
how to explain an example from each class of vertebrate
The molecular weight of "Y" is 200. I use 10g of "Y" in 10mL of water. What is the molarity of this solution of "Y"? What percentage solution of "Y" is it?
find the habits and habitats of scyphas?
Mutations are the only kind of variability generating mechanism in prokaryotes and asexually reproducing organisms. But in eukaryotes where sexual recombination occurs, even in one
Identify three possible consequences of doubling Earth's human population. Increased CO2 in the atmosphere and globalwarming; increased use of resources to producehomes, schoo
Determine Effect of Inadequate calcium intake and iron deficiency anaemia? The requirement of iron and calcium is at its peak in adolescence due to an increase in the skeletal
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd