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.
Q. Symptoms and Complications of atherosclerosis? Symptoms Excessive weight, hypertension, high levels of cholesterol and triglycerides. Complications Myocardia
How many progeny flies are expected to have full wings and gray bodies?
What are the functional divisions of the nervous system? Functionally the nervous system can be separated into the somatic nervous system and visceral nervous system. The so
digram or mammalian testis
Contagious bovine pleuropneumonia (CBPP) This is a highly fatal disease of cattle and of major economic importance in certain tropical countries. It also affects buffaloes, bis
I usually study in the library on the schools computers so I will be accessing the eBook from many different computers throughout the semester. Is there a limit to how many compute
Community Change Ecosystems are dynamic entities in which a number of events take place. Associated with the biotic communities of the ecosystem are some changes, which may be
detail study of coelenterata
A field trip to observe flowers:- Plan a field trip to view flowers in bloom. If no interesting wildflowers can be found growing near the school, the trip can be planned to a p
Explain the Conveyor (or Band) Dryers? In the conveyor (or band) dryer, the product is distributed on a moving belt, typically of a perforated plate, that passes through a tunn
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