How does the structure of nerve cells relate to their function?
Answer: The structure of a neuron allows it to rapidly transmit nerve impulses to other cells. The axon of many neurons has an outer layer called a myelin sheath (see Figure above). Regularly spaced nodes, or gaps, in the myelin sheath allow nerve impulses to skip along the axon very rapidly.
What is the structure and function of the nerves in the nervous system?
Nerve cells are called neurones . They are adapted to carry electrical impulses from one place to another. A bundle of neurones is called a nerve. There are three main types of neurone.
What is the function of the nerve cell?
Nerve cells (neurones) are ‘excitable’ cells which can transduce a variety of stimuli into electrical signals, continuously sending information about the external and internal environment (in the form of sequences of action potentials) to the central nervous system (CNS).
What is structure of nerve cell?
Neuron Structure As shown in Figure below, a neuron consists of three basic parts: the cell body, dendrites, and axon. The cell body contains the nucleus and other cell organelles. Dendrites extend from the cell body and receive nerve impulses from other neurons. The axon branches at the end, forming axon terminals.
What is the structure of nerve?
A nerve consists of many structures including axons, glycocalyx, endoneurial fluid, endoneurium, perineurium, and epineurium. The axons are bundled together into groups called fascicles, and each fascicle is wrapped in a layer of connective tissue called the perineurium.
What is the main structure of the nervous system?
The nervous system has two main parts: The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
What is the structure of the nerve?
What are the basic structures of a neuron and the function of each structure?
The primary components of the neuron are the soma (cell body), the axon (a long slender projection that conducts electrical impulses away from the cell body), dendrites (tree-like structures that receive messages from other neurons), and synapses (specialized junctions between neurons).
What is the nerve cell?
Listen to pronunciation. (nerv sel) A type of cell that receives and sends messages from the body to the brain and back to the body. The messages are sent by a weak electrical current.
Which of the following is the function of the nerve?
Nerves are bundles of axons in the peripheral nervous system (PNS) that act as information highways to carry signals between the brain and spinal cord and the rest of the body.
What is the function of the nervous system in the human body?
The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages.
What are the main functions of nerve cells?
The principal function of nerve cells is to generate the electric nerve impulses, process, transmit and receive them between various organs. They carry these nerve signals from one part of the body to another part of the body.
What is the difference between a nerve cell and a muscle cell?
Muscle cells are the structural and functional unit of the muscle tissue while nerve cells are found in the nervous system. The main difference between muscle cells and nerve cells is that muscle cells are responsible for the contraction and relaxation of muscles whereas nerve cells are responsible…
How are nerve cells adapted to their function?
Nerve cell have very long axons which can take the message a very long way before passing it on to the next cell, this makes it quicker. Another adaptation is the myelin sheath it makes the cell very thick and the thicker they are the faster the impulses are transmitted across them;
Is a nerve cell and a neuron the same thing?
A neuron, also known as a neurone (British spelling) and nerve cell, is an electrically excitable cell that communicates with other cells via specialized connections called synapses. All multicellular organisms except sponges and Trichoplax have neurons. A neuron is the main component of nervous tissue.