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!
Explain the Nerve Cell Structure and Function?
Before studying the organization of the nervous system, we will look at the relationship between structure and function of nerve and associated cells. The typical nerve cell or neuron has a cell body containing the nucleus, and an elongated extension called an axon that carries electrical signals called impulses away from the cell body. The axon is frayed at the end to form many synaptic terminals that transmit the nerve impulse to a target cell in a contact space called a synapse. The nerve impulse is carried across the synapse by certain chemicals called neurotransmitters. These chemicals are enclosed in synaptic vesicles that fuse with the presynaptic membrane and are released in response to a nerve impulse that reaches the axon terminal. Neurotransmitters bind to the postsynaptic membrane of the target cell, which can be a muscle, a gland, or the terminals of another neuron that takes over to propagate the nerve impulse. After the impulse is propagated, enzymes in the synaptic space break down the remaining neurotransmitter chemicals.
Surrounding the nerve cell body are short, branched extensions called dendrites, that bind neurotransmitters released by other neurons or by sensory receptors, cells associated with the five senses - touch, vision, hearing, taste, and smell. Some sensory receptors are actually specialized neurons.
Axons of some nerve cells are surrounded by a protective sheath of membranous material called myelin, produced by accessory cells called Schwann cells. Myelin gives bundled nerves their white appearance. Myelin is not continuous along the axon, but the sheath is interrupted at regular intervals called nodes of Ranvier, where the nerve is unmyelinated.
Define Probability concept of requirements vs risk of deficient and excess intake? Figure best illustrates the concept of a requirement for an essential nutrient. The relations
We now understand that mutations that cause the inhibition of apoptosis are found in tumors. Because proliferation itself is not induced by the inhibition of apoptosis, explain how
Significance of Apomixis Apomixis offers the possibility of indefinite multiplication of especially favorable biotypes without any variation due to segregation or recombinati
Adverse Effects of Valacyclovir Valacyclovir is generally well tolerated; adverse effects are similar to those with acyclovir. GI disturbance, headache, rash, CNS effects such
Q. What is hematosis? In humans where does hematosis occur? Hematosis is the oxygenation of the blood, venous blood (oxygen-poor) after hematosis is transformed into arterial b
How we attempt a question of phylum mollusca?
What role would a cell coat play if it was a part of a city?
During Abutment Connection Implants should be tested for the presence of any mobility and the radiographs should be taken. These radiographs are very vital as they serve as the
Genic Type-Genetic basis of Sex Determination In some organisms, certain indepe~ident genes located on different chromosomes are responsible for sex determination. Most species
Scanning Electron Microscopy (SEM) While 'TEM is useful to study the internal structul-c of thc ccll. SEM is an important technique if you wish to examine the surl'ace features o
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