The master controlling and communicating system of the body Functions
... Is the focal point for the outgrowth of neuronal processes Has no centrioles (hence its amitotic nature) Has well-developed Nissl bodies (rough ER) Contains an axon hillock – cone-shaped area from which axons arise ...
... Is the focal point for the outgrowth of neuronal processes Has no centrioles (hence its amitotic nature) Has well-developed Nissl bodies (rough ER) Contains an axon hillock – cone-shaped area from which axons arise ...
Nervous System - Phoenix Union High School District
... d) oligodendrocytes- branched; connect thick nerve fibers; produce a myelin sheath around neurons. ...
... d) oligodendrocytes- branched; connect thick nerve fibers; produce a myelin sheath around neurons. ...
The Brain and Its Disorders
... The Neuron • Soma (cell body) – contains nucleus, cytoplasm, organelles • Dendrites – receive info • Axon – transmits info • Myelin sheath – covers the axon to increase transmission speed (cause of sensory and motor disturbances in multiple sclerosis) ...
... The Neuron • Soma (cell body) – contains nucleus, cytoplasm, organelles • Dendrites – receive info • Axon – transmits info • Myelin sheath – covers the axon to increase transmission speed (cause of sensory and motor disturbances in multiple sclerosis) ...
The biological Approach
... • Branch-like structures called dendrites protrude from the cell bodythese carry nerve impulses from other neurons towards the cell body. • The axon carries impulses away from the cell body. It is covered in a fatty layer called the myelin sheath that protects the axon and speeds up transmission of ...
... • Branch-like structures called dendrites protrude from the cell bodythese carry nerve impulses from other neurons towards the cell body. • The axon carries impulses away from the cell body. It is covered in a fatty layer called the myelin sheath that protects the axon and speeds up transmission of ...
Chapter 13: The Nervous System
... closed and the inflow of Na+ is halted. K gates are now open and K+ once again begins to diffuse out of the nerve cell. This restores the original polarity of the membrane and is called ...
... closed and the inflow of Na+ is halted. K gates are now open and K+ once again begins to diffuse out of the nerve cell. This restores the original polarity of the membrane and is called ...
The Nervous System
... Neurons and the Connections They Love… • The NEURON, or nerve cell is the functional unit of the nervous system. • Composed of cell body, dendrites, axon, myelin sheath, synaptic terminals (bulbs) ...
... Neurons and the Connections They Love… • The NEURON, or nerve cell is the functional unit of the nervous system. • Composed of cell body, dendrites, axon, myelin sheath, synaptic terminals (bulbs) ...
NERVOUS SYSTEM - Welcome to the Health Science Program
... and a receiving neuron space between a terminal axon and receiving neuron is called the synaptic cleft synaptic cleft is where electrochemical transmission takes place, thus communication Impulses from one neuron are transmitted across the synapse to another neuron by a chemical called a neurotransm ...
... and a receiving neuron space between a terminal axon and receiving neuron is called the synaptic cleft synaptic cleft is where electrochemical transmission takes place, thus communication Impulses from one neuron are transmitted across the synapse to another neuron by a chemical called a neurotransm ...
Introduction
... •Signaling within these circuits gives rise to higher cognitive functions, such as thinking. •Since circuits are needed for even the most basic function, it has been suggested that the functional unit of the nervous system is a group of neurons, rather than an individual neuron. •How do these circui ...
... •Signaling within these circuits gives rise to higher cognitive functions, such as thinking. •Since circuits are needed for even the most basic function, it has been suggested that the functional unit of the nervous system is a group of neurons, rather than an individual neuron. •How do these circui ...
Chapter 10
... Neuronal Pools •groups of interneurons that make synaptic connections with each other • interneurons work together to perform a common function • each pool receives input from other neurons • each pool generates output to other neurons ...
... Neuronal Pools •groups of interneurons that make synaptic connections with each other • interneurons work together to perform a common function • each pool receives input from other neurons • each pool generates output to other neurons ...
Slide 1
... 1. Neurons are electrically active; They have a resting voltage, and can undergo electrical changes ...
... 1. Neurons are electrically active; They have a resting voltage, and can undergo electrical changes ...
File
... • Zoloft is part of a class of drugs called selective serotonin reuptake inhibitors, or • SSRIs for short. SSRIs act on a specific chemical within the brain known as serotonin. This is one of several chemicals used to send messages from one nerve cell to another. ...
... • Zoloft is part of a class of drugs called selective serotonin reuptake inhibitors, or • SSRIs for short. SSRIs act on a specific chemical within the brain known as serotonin. This is one of several chemicals used to send messages from one nerve cell to another. ...
Document
... • A neuron which carries signals from tissue to brain is a sensory neuron or afferent neuron. • A neuron which carries signals from the brain to tissue is a motor neuron or efferent neuron. ...
... • A neuron which carries signals from tissue to brain is a sensory neuron or afferent neuron. • A neuron which carries signals from the brain to tissue is a motor neuron or efferent neuron. ...
NeuroReview3
... • Promote regeneration in the mammalian PNS by producing neurotrophic factors and cell adhesion molecules (CAMs) • Neurotrophic factors stimulate growth of new axons and CAMs on membranes of Schwann cells provide the paths along which regenerating axons grow • In CNS oligodendroglia do not stimulate ...
... • Promote regeneration in the mammalian PNS by producing neurotrophic factors and cell adhesion molecules (CAMs) • Neurotrophic factors stimulate growth of new axons and CAMs on membranes of Schwann cells provide the paths along which regenerating axons grow • In CNS oligodendroglia do not stimulate ...
neuron
... Axon – the extension of a neuron through which messages are sent to other neurons or to muscles or glands ...
... Axon – the extension of a neuron through which messages are sent to other neurons or to muscles or glands ...
Action Potential Webquest
... discussion as we look more at action potentials and the role that ion channels and ions play in the creation and transmission of a nerve impulse. 1. In no more than 5 sentences, describe the overall process of creating and transmitting a nervous impulse. Make sure that you briefly touch on ion chann ...
... discussion as we look more at action potentials and the role that ion channels and ions play in the creation and transmission of a nerve impulse. 1. In no more than 5 sentences, describe the overall process of creating and transmitting a nervous impulse. Make sure that you briefly touch on ion chann ...
Motor neuron
... muscles/glands for reaction Interneurons connectors; only in brain and spinal cord Example: Water temp in shower ...
... muscles/glands for reaction Interneurons connectors; only in brain and spinal cord Example: Water temp in shower ...
HBNervous
... sensory centers and centers of emotions and intellect. Information is carried to and from the brain by the cranial nerve and to and from the spinal cord by the spinal nerve. In the interiors of the brain is a hollow space filled with fluid called the cerebrospinal fluid. Neurons in the brain are sur ...
... sensory centers and centers of emotions and intellect. Information is carried to and from the brain by the cranial nerve and to and from the spinal cord by the spinal nerve. In the interiors of the brain is a hollow space filled with fluid called the cerebrospinal fluid. Neurons in the brain are sur ...
Name
... 13. ovoid glial cells that are phagocytic 14. not having the ability to reproduce 15. clusters of neuron cell bodies found in the PNS 16. a chemical which diffuses across the synapse in order to affect a postsynaptic neuron 17. stimulus strength NOT strong enough to cause a response 18. when these “ ...
... 13. ovoid glial cells that are phagocytic 14. not having the ability to reproduce 15. clusters of neuron cell bodies found in the PNS 16. a chemical which diffuses across the synapse in order to affect a postsynaptic neuron 17. stimulus strength NOT strong enough to cause a response 18. when these “ ...
Structure of the Nervous System
... •Signaling within these circuits gives rise to higher cognitive functions, such as thinking. •Since circuits are needed for even the most basic function, it has been suggested that the functional unit of the nervous system is a group of neurons, rather than an individual neuron. •How do these circui ...
... •Signaling within these circuits gives rise to higher cognitive functions, such as thinking. •Since circuits are needed for even the most basic function, it has been suggested that the functional unit of the nervous system is a group of neurons, rather than an individual neuron. •How do these circui ...
Nervous System Function
... NT binding site – NT activates a “second messenger” (1st is the NT) inside the cell Change function of cell (e.g., change protein production to permanently alter cell function for learning) ...
... NT binding site – NT activates a “second messenger” (1st is the NT) inside the cell Change function of cell (e.g., change protein production to permanently alter cell function for learning) ...
Slide 1
... ► The mystery begins in the womb -- only four weeks into gestation the first brain cells, the neurons, are already forming at an astonishing rate: 250,000 every minute. ► Billions of neurons will form links with billions of other neurons and eventually there will be trillions and trillions of connec ...
... ► The mystery begins in the womb -- only four weeks into gestation the first brain cells, the neurons, are already forming at an astonishing rate: 250,000 every minute. ► Billions of neurons will form links with billions of other neurons and eventually there will be trillions and trillions of connec ...
Axon
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An axon (from Greek ἄξων áxōn, axis), also known as a nerve fibre, is a long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body. The function of the axon is to transmit information to different neurons, muscles and glands. In certain sensory neurons (pseudounipolar neurons), such as those for touch and warmth, the electrical impulse travels along an axon from the periphery to the cell body, and from the cell body to the spinal cord along another branch of the same axon. Axon dysfunction causes many inherited and acquired neurological disorders which can affect both the peripheral and central neurons.An axon is one of two types of protoplasmic protrusions that extrude from the cell body of a neuron, the other type being dendrites. Axons are distinguished from dendrites by several features, including shape (dendrites often taper while axons usually maintain a constant radius), length (dendrites are restricted to a small region around the cell body while axons can be much longer), and function (dendrites usually receive signals while axons usually transmit them). All of these rules have exceptions, however.Some types of neurons have no axon and transmit signals from their dendrites. No neuron ever has more than one axon; however in invertebrates such as insects or leeches the axon sometimes consists of several regions that function more or less independently of each other. Most axons branch, in some cases very profusely.Axons make contact with other cells—usually other neurons but sometimes muscle or gland cells—at junctions called synapses. At a synapse, the membrane of the axon closely adjoins the membrane of the target cell, and special molecular structures serve to transmit electrical or electrochemical signals across the gap. Some synaptic junctions appear partway along an axon as it extends—these are called en passant (""in passing"") synapses. Other synapses appear as terminals at the ends of axonal branches. A single axon, with all its branches taken together, can innervate multiple parts of the brain and generate thousands of synaptic terminals.