Nervous System Poster
... Essential Knowledge: Animals have nervous systems that detect external and internal signals, transmit and integrate information and produce responses. A. The neuron is the basic structure of the nervous system that reflects function. 1. A typical neuron has a cell body, axon and dendrites. Many axon ...
... Essential Knowledge: Animals have nervous systems that detect external and internal signals, transmit and integrate information and produce responses. A. The neuron is the basic structure of the nervous system that reflects function. 1. A typical neuron has a cell body, axon and dendrites. Many axon ...
48 Nervous System PowerPoint
... delivers the signal away to another neuron or to the CNS Myelin sheaths (white matter) insulate the axon and are made by Schwanns cells or oligodendrocytes. Schwanns and Oligodendrocytes are both types of supporting cells called glia. What is saltatory conduction? P.970 What is a Node of Ranvier? Wh ...
... delivers the signal away to another neuron or to the CNS Myelin sheaths (white matter) insulate the axon and are made by Schwanns cells or oligodendrocytes. Schwanns and Oligodendrocytes are both types of supporting cells called glia. What is saltatory conduction? P.970 What is a Node of Ranvier? Wh ...
General design of the nervous system
... The somatic nervous system includes all nerves controlling the muscular system and external sensory receptors. External sense organs (including skin) are receptors. Muscle fibers and gland cells are effectors (since they prerform the functions dictated by the nerve signals). The autonomous nervous s ...
... The somatic nervous system includes all nerves controlling the muscular system and external sensory receptors. External sense organs (including skin) are receptors. Muscle fibers and gland cells are effectors (since they prerform the functions dictated by the nerve signals). The autonomous nervous s ...
The Nervous System
... E. Schwann cells • 1. located outside of CNS • 2. produce myelin sheath as do the oligodendrocytes • 3. takes several Schwann cells to produce the myelin sheath for one axon of one nerve cell ...
... E. Schwann cells • 1. located outside of CNS • 2. produce myelin sheath as do the oligodendrocytes • 3. takes several Schwann cells to produce the myelin sheath for one axon of one nerve cell ...
Types of neurons
... Controls protein manufacturing Directs metabolism No role in neural signaling ...
... Controls protein manufacturing Directs metabolism No role in neural signaling ...
Types of neurons
... Controls protein manufacturing Directs metabolism No role in neural signaling ...
... Controls protein manufacturing Directs metabolism No role in neural signaling ...
big
... Neurotransmitter is taken back into the presynaptic cell (“reuptake”) so that its effect has a time limit. – Prozac and relatives are “Selective Serotonin Reuptake Inhibitors” so it slows the reuptake of the neurotransmitter serotonin, increasing duration of its effects in the synapse. ...
... Neurotransmitter is taken back into the presynaptic cell (“reuptake”) so that its effect has a time limit. – Prozac and relatives are “Selective Serotonin Reuptake Inhibitors” so it slows the reuptake of the neurotransmitter serotonin, increasing duration of its effects in the synapse. ...
17-01-05 1 Golgi - stained neurons Neuronal function
... - vary in length … a few 10’s of microns, to many cm. - contain microtubules and microtubule binding proteins - relatively constant diameter in any neuron - always have specialized areas that release neurotransmitter -- terminal or en passant ...
... - vary in length … a few 10’s of microns, to many cm. - contain microtubules and microtubule binding proteins - relatively constant diameter in any neuron - always have specialized areas that release neurotransmitter -- terminal or en passant ...
General Neurophysiology
... Transduction of signals at the cellular level Somatodendritic part – passive conduction of the signal, with decrement ...
... Transduction of signals at the cellular level Somatodendritic part – passive conduction of the signal, with decrement ...
General Neurophysiology - Univerzita Karlova v Praze
... Transduction of signals at the cellular level • Axonal part –action potential, spreading without decrement, all-or-nothing law ...
... Transduction of signals at the cellular level • Axonal part –action potential, spreading without decrement, all-or-nothing law ...
CH 12 shortened for test three nervous tissue A and P 2016
... temporal sum=rapid input from 1 causes LPs to reach threshold and AP spatial sum = input from many add LPs to threshold and AP produced facilitation = 1 neuron makes another more likely to fire presynaptic inhibition = 1 neuron makes another less likely to fire divergence = one stimulus causes AP in ...
... temporal sum=rapid input from 1 causes LPs to reach threshold and AP spatial sum = input from many add LPs to threshold and AP produced facilitation = 1 neuron makes another more likely to fire presynaptic inhibition = 1 neuron makes another less likely to fire divergence = one stimulus causes AP in ...
Nervous System II – Neurons
... Non-neuronal cells; the glue of the nervous system Form the ________________________. Fatty layer formed around the ______________ of a neuron. Helps ______________ the speed at which impulses propagate along the axon because the impulses can hop between the _______________________________. ______ ...
... Non-neuronal cells; the glue of the nervous system Form the ________________________. Fatty layer formed around the ______________ of a neuron. Helps ______________ the speed at which impulses propagate along the axon because the impulses can hop between the _______________________________. ______ ...
The Nervous System - Downtown Magnets High School
... • Increases with myelin (80% lipid, 20% protein) • Myelin surrounds axon; acts as electric insulator • Created from Schwann cells. ...
... • Increases with myelin (80% lipid, 20% protein) • Myelin surrounds axon; acts as electric insulator • Created from Schwann cells. ...
Neurons - Scott Melcher
... Neurons are intricately interwoven, but do not actually touch. The junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving cell is called a synapse. The tiny gap at this junction is called the synaptic gap or cleft. When neurons are firing and action potent ...
... Neurons are intricately interwoven, but do not actually touch. The junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving cell is called a synapse. The tiny gap at this junction is called the synaptic gap or cleft. When neurons are firing and action potent ...
Neurons - Jordan High School
... Na+ enters cell, transmembrane potential becomes more positive (depolarization) More open channels = more Na+ = more depolarization Repolarization vs. hyperpolarization ...
... Na+ enters cell, transmembrane potential becomes more positive (depolarization) More open channels = more Na+ = more depolarization Repolarization vs. hyperpolarization ...
Assignment: Sensing mechanical changes in firing neurons
... Volts/meter. When an action potential travels down the axon, deviations from this resting potential in the order of 100 milliVolts occur, causing a strong change in electrical field strength over this membrane. It is our hypothesis that this change in electrical field causes small mechanical deforma ...
... Volts/meter. When an action potential travels down the axon, deviations from this resting potential in the order of 100 milliVolts occur, causing a strong change in electrical field strength over this membrane. It is our hypothesis that this change in electrical field causes small mechanical deforma ...
Nervous System 4/28/09
... 1. Receiving info – inside and outside body 2. Responding to info – reaction to stimulus (change/signal) 3. Maintaining homeostasis ...
... 1. Receiving info – inside and outside body 2. Responding to info – reaction to stimulus (change/signal) 3. Maintaining homeostasis ...
Nervous System Outline 1
... A. Sensory Input - Sending information into the brain or spinal cord neurons in the body. 1. Sensory Receptors receive a stimulus from the environment. A stimulus is a form of energy such as electromagnetic (light), mechanical (pressure), or sound waves. B. Integration 1. This is the interpretation ...
... A. Sensory Input - Sending information into the brain or spinal cord neurons in the body. 1. Sensory Receptors receive a stimulus from the environment. A stimulus is a form of energy such as electromagnetic (light), mechanical (pressure), or sound waves. B. Integration 1. This is the interpretation ...
nervous5
... If 4 inhibitory synapses are active at the same time, how many excitatory synapses must be active simultaneously to exceed threshold (-55 mV) if the resting membrane potential is -70mV? ...
... If 4 inhibitory synapses are active at the same time, how many excitatory synapses must be active simultaneously to exceed threshold (-55 mV) if the resting membrane potential is -70mV? ...
Nervous System/Special Senses Review
... Vesicles release neurotransmitters into the synapse. Neurotransmitters bind to receptors on the membrane of the dendrite of next neuron. Action potential initiated along dendrite of next neuron. ...
... Vesicles release neurotransmitters into the synapse. Neurotransmitters bind to receptors on the membrane of the dendrite of next neuron. Action potential initiated along dendrite of next neuron. ...
ppt
... 2. Outine the steps in chemical synaptic transmission and predict changes in the efficacy of transmission when the system is perturbed (e.g. changes in ion concentrations or addition of drugs). 3. Explain the role of the neurotransmitter receptor in determining a neurotransmitter’s effect on the p ...
... 2. Outine the steps in chemical synaptic transmission and predict changes in the efficacy of transmission when the system is perturbed (e.g. changes in ion concentrations or addition of drugs). 3. Explain the role of the neurotransmitter receptor in determining a neurotransmitter’s effect on the p ...
Chapter 5b
... Changes in resting potential Resting Potential Becomes Less than -70 mvolts = Depolarization Resting Potential Becomes More than -70 mvolts = Hyperpolarization If voltage exceeds threshold (~-55mV) the neuron fires. ...
... Changes in resting potential Resting Potential Becomes Less than -70 mvolts = Depolarization Resting Potential Becomes More than -70 mvolts = Hyperpolarization If voltage exceeds threshold (~-55mV) the neuron fires. ...
Name: Date: ______ 1. The self-examination of
... d) an antagonist molecule that blocks neurotransmitter receptor sites. 12. A synapse is a(n): a) neural cable containing many axons. b) chemical messenger that triggers muscle contractions. c) automatic response to sensory input. d) junction between a sending neuron and a receiving neuron. 13. Reupt ...
... d) an antagonist molecule that blocks neurotransmitter receptor sites. 12. A synapse is a(n): a) neural cable containing many axons. b) chemical messenger that triggers muscle contractions. c) automatic response to sensory input. d) junction between a sending neuron and a receiving neuron. 13. Reupt ...
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.