THE NEuRoN - Big Picture
... function properly. Others (oligodendrocytes) wrap neurons in an insulating myelin sheath, which can become damaged in neurodegenerative conditions such as stroke, spinal cord injury, multiple sclerosis and cerebral palsy. A better understanding of how neurons interact with glial cells may help in fi ...
... function properly. Others (oligodendrocytes) wrap neurons in an insulating myelin sheath, which can become damaged in neurodegenerative conditions such as stroke, spinal cord injury, multiple sclerosis and cerebral palsy. A better understanding of how neurons interact with glial cells may help in fi ...
Ch 3 Review
... The Action Potential The axon membrane is pierced by tiny molecular channels called ion channels These channels are blocked when the neuron is at its resting potential. ...
... The Action Potential The axon membrane is pierced by tiny molecular channels called ion channels These channels are blocked when the neuron is at its resting potential. ...
2.2 Electrical Communication Study Guide by Hisrich
... at its dendrites, passes the signals down the axon, into the axon terminals, and into the synapses. The synapse then drops neurotransmitter into the synaptic cleft between the first neuron’s synapse and the next neuron’s dendrites. That signals neuron #2 to pass the message on. ...
... at its dendrites, passes the signals down the axon, into the axon terminals, and into the synapses. The synapse then drops neurotransmitter into the synaptic cleft between the first neuron’s synapse and the next neuron’s dendrites. That signals neuron #2 to pass the message on. ...
Name: Date: Grade / Section: _____ Neurons Questions Notes 1
... 3. _____________ neurons send impulses to muscles, causing them to move in response Explain what each neuron does in the picture when the person puts her hand near the flame: Sensory Interneuron Motor - ...
... 3. _____________ neurons send impulses to muscles, causing them to move in response Explain what each neuron does in the picture when the person puts her hand near the flame: Sensory Interneuron Motor - ...
Biology Notes: The Nervous System and Neurons
... ReView (at the end of the PowerPoint you should be able to answer these questions) 1. What is the function of the nervous system? 2. List the 4 main parts and describe the purpose of the 4 main parts of a neuron. 3. The nervous system is divided into 2 parts. What are they and what do they incl ...
... ReView (at the end of the PowerPoint you should be able to answer these questions) 1. What is the function of the nervous system? 2. List the 4 main parts and describe the purpose of the 4 main parts of a neuron. 3. The nervous system is divided into 2 parts. What are they and what do they incl ...
Types of neurons
... Controls protein manufacturing Directs metabolism No role in neural signaling ...
... Controls protein manufacturing Directs metabolism No role in neural signaling ...
Ch. 48 - 49
... are made by Schwanns cells or oligodendrocytes What is a Node of Ranvier? What is saltatory conduction? What is a synapse? ...
... are made by Schwanns cells or oligodendrocytes What is a Node of Ranvier? What is saltatory conduction? What is a synapse? ...
neurons
... Note the similarities in the above brain regions, which are all engaged in information processing. ...
... Note the similarities in the above brain regions, which are all engaged in information processing. ...
Nervous System Introduction
... • Axon - one per neuron – a. conducting process - carries info away from soma, toward other neurons or effectors – b. length varies greatly, can be very long sciatic axons > 1 meter (spine -> foot) – c. no ribosomes, no protein synthesis, depend on axonal cytoplasmic transport from soma – d. collate ...
... • Axon - one per neuron – a. conducting process - carries info away from soma, toward other neurons or effectors – b. length varies greatly, can be very long sciatic axons > 1 meter (spine -> foot) – c. no ribosomes, no protein synthesis, depend on axonal cytoplasmic transport from soma – d. collate ...
The Nervous System
... • Even the same NT can have different effects in different parts of the body ...
... • Even the same NT can have different effects in different parts of the body ...
Document
... • One axon per cell arising from the axon hillock • Long axons (nerve fibers) • Occasional branches (axon collaterals) The Axon • Numerous terminal branches (telodendria) • Knoblike axon terminals (synaptic knobs or boutons) • Secretory region of neuron • Release neurotransmitters to excite or inhib ...
... • One axon per cell arising from the axon hillock • Long axons (nerve fibers) • Occasional branches (axon collaterals) The Axon • Numerous terminal branches (telodendria) • Knoblike axon terminals (synaptic knobs or boutons) • Secretory region of neuron • Release neurotransmitters to excite or inhib ...
Fundamentals of the Nervous System and Nervous Tissue: Part A
... • One axon per cell arising from the axon hillock • Long axons (nerve fibers) • Occasional branches (axon collaterals) The Axon • Numerous terminal branches (telodendria) • Knoblike axon terminals (synaptic knobs or boutons) • Secretory region of neuron • Release neurotransmitters to excite or inhib ...
... • One axon per cell arising from the axon hillock • Long axons (nerve fibers) • Occasional branches (axon collaterals) The Axon • Numerous terminal branches (telodendria) • Knoblike axon terminals (synaptic knobs or boutons) • Secretory region of neuron • Release neurotransmitters to excite or inhib ...
Nervous system lecture 1
... – Graded potentials Summation – combination of these graded, local potentials at the axon hillock can bring about an action potential or inhibit the generation of the action potential. – Spatial: stimulation by many neurons at one time. – Temporal: increased numbers of impulses per minute. ...
... – Graded potentials Summation – combination of these graded, local potentials at the axon hillock can bring about an action potential or inhibit the generation of the action potential. – Spatial: stimulation by many neurons at one time. – Temporal: increased numbers of impulses per minute. ...
Peripheral nervous system
... one section of the axon 4. The Na+ channels in that area close but the region down the axon gets positive enough to reach threshold Na+ channels open and sodium rushes in… this continues down the axon 5. The K+ channels open and potassium diffuses out 6. The cell becomes repolarized BUT K+ is conc ...
... one section of the axon 4. The Na+ channels in that area close but the region down the axon gets positive enough to reach threshold Na+ channels open and sodium rushes in… this continues down the axon 5. The K+ channels open and potassium diffuses out 6. The cell becomes repolarized BUT K+ is conc ...
Sample Questions for Evaluation #1 – General
... 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 ...
Mind, Brain & Behavior
... The nervous system has more diseases than any other organ of the body. Some diseases attack a particular kind of neuron (e.g., motor neurons in ALS & polio). ...
... The nervous system has more diseases than any other organ of the body. Some diseases attack a particular kind of neuron (e.g., motor neurons in ALS & polio). ...
Open Document - Clinton Community College
... receive, integrate and transmit information. Components of a neuron: ◦ A.) cell body (soma)- contains nucleus and chemical ...
... receive, integrate and transmit information. Components of a neuron: ◦ A.) cell body (soma)- contains nucleus and chemical ...
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.