The Nervous System. Which structures make up the nervous system The structures that form the nervous system can be divided into the central nervous system CNS and the peripheral nervous system PNS. The organs of the CNS are the brain cerebrum, brainstem and cerebellum and spinal cord. The PNS is made of nerves and neural ganglia. WfUo3TnyNQlMY2fBnImUTgpJw9.jpg' alt='Impulse Full Movie' title='Impulse Full Movie' />In addition to these organs, the meninges dura mater, arachnoid and pia mater are also a part of the nervous system, since they cover and protect the encephalon and the spinal cord. Select any question to share it on FB or Twitter. Just select or double click a question to share. Challenge your Facebook and Twitter friends. Cells of the Nervous System. What are the main cells of the nervous systemThe main cells of the nervous system are neurons. In addition to neurons, the nervous system is also made up of glial cells. Buy NURSAL Rechargeable Tens Unit with 16 Modes and 8 Pads Pulse Impulse Pain Relief Massager on Amazon. FREE SHIPPING on qualified orders. Foxs next Marvel movie New Mutants will set the story in a Breakfast ClubmeetsOne Flew Over the Cuckoos Next scenario, helping it to stand apart. Rangoon movie review Kangana Ranaut delivers a standout performance in this patchy film Rangoon movie review The Kangana Ranaut, Shahid Kapoor film gets tangled in. Nude celebrity MP4 movie clips of Theresa Russell. What are the functional differences between neurons and glial cells Glial cells and neurons are the cells that form the nervous system. Neurons are cells that have the function of receiving and transmitting neural impulses whereas glial cells astrocytes, microgliacytes, ependymal cells and oligodendrocytes are the cells that support, feed and insulate electrically the neurons. The Schwann cells that produce the myelin sheath of the peripheral nervous system can also be considered glial cells. Neurons and Synapses. What are the three main parts into which a neuron can be divided What are their respective functions The three mains parts into which a neuron can be divided are dendrites, the cell body and the axon. Dendrites are projections of the plasma membrane that receive the neural impulse from other neurons. The cell body is where the nucleus and the main cellular organelles are located. Watch The Color Purple Putlocker. The axon is the long membrane projection that transmits the neural impulse at a distance to other neurons, to muscle cells and to other effector cells. What is the name of the terminal portion of the axon The terminal portion of the axon is called the presynaptic membrane. Through this membrane, neurotransmitters are released into the synaptic junction. The Nervous System Review Image Diversity synapse. What are synapsesSynapses are the structures that transmit a neural impulse between two neurons. When the electric impulse arrives, the presynaptic membrane of the axon releases neurotransmitters that bind to the postsynaptic receptors of the dendrites of the next cell. The activated state of these receptors alters the permeability of the dendritic membrane and the electric depolarization moves along the plasma membrane of the neuron to its axon. Neural Transmission. Watch Mr. Freedom Online Full Movie. What is an example of a situation in which the cell body of a neuron is located in one part of the body while its axonal terminal portion is located in another distant part of the body Why does this happenMost neurons are located within the brain and the spinal cord the central nervous system in places known as neural nuclei. Neural ganglia, or simply ganglia, are structures of the peripheral nervous system located beside the spine or near certain organs, in which neuron cell bodies are also located. Neurons located at specific points can may have distant axonal terminations and can also receive impulses from the axons of distant neurons. An example of this are the inferior motor neurons in the spinal cord, since their axons can transmit information to the extremities of the lower limbs, triggering foot contractions. What are the types of neurons in terms of the function of the impulses they transmit How different are the concepts of afference and efference in terms of neural impulse transmissionThere are three types of neurons afferent neurons, efferent neurons and interneurons. Afferent neurons only transmit sensory information from the tissues to neural nuclei and ganglia where they come into contact with interneurons or effector neurons. Efferent neurons transmit commands for tasks to be performed in several parts of the body. Interneurons, also known as association neurons or relay neurons, serve as a connection between the other two types of neurons. Afference is the conduction of sensory impulses and efference is the conduction of effector impulses impulses that command some action in the body. Nerves and Ganglia. What are nerves Axons extend throughout the body inside nerves. Nerves are axon containing structures which are home to a large number of axons and which are covered by connective tissue. Nerves connect neural nuclei and ganglia with tissues. Nerves may contain only sensory axons sensory nerves, only motor axons motor neurons or both types of axons mixed nerves. The Nervous System Review Image Diversity nerves. What are ganglia Ganglia singular ganglion, or neural ganglia, are structures located outside the central nervous system for example, beside the spine or near viscera made of a concentration of neuron bodies. Examples of neural ganglia are the ganglia that contain the cell bodies of sensory neurons in the dorsal roots of the spinal cord and the ganglia of the myenteric plexus, which are responsible for the peristaltic movements of the digestive tract. In the central nervous system CNS, concentrations of neuron bodies are called nuclei and not ganglia. The Nervous System Review Image Diversity ganglia. What is meant by the peripheral nervous system PNS The peripheral nervous system is made up of the nerves and ganglia of the body. The Myelin Sheath. What is the function of the myelin sheath Do all axons have a myelin sheath The function of the myelin sheath is to improve the safety and speed of neural impulse transmission along the axon. The myelin sheath serves as an electrical insulator, preventing the dispersion of the impulse into other adjacent structures. Since the myelin sheath has gaps called Ranviers nodes along its length, the neural impulse jumps from one node to another, thus increasing the speed of the neural transmission. Not all neurons have a myelin sheath. Axonal fibers may be myelinated or unmyelinated. Which cells produce the myelin sheath What is the myelin sheath made ofIn the central nervous system CNS, the myelin sheath is made of an apposition of oligodendrocyte membranes. Each oligodendrocyte may cover portions of the axons of several different neurons. In the peripheral nervous system PNS, the myelin sheath is made of consecutive Schwann cell membranes covering segments of a single axon.