The Neural Control of Behavior
... • Synapse at which the neurotransmitter decreases the likelihood that an action potential will occur • NT open Cl- or K+ channel hyperpolarization ...
... • Synapse at which the neurotransmitter decreases the likelihood that an action potential will occur • NT open Cl- or K+ channel hyperpolarization ...
The Nervous System funtions and neuron
... – Dendrites (conveys signal to cell body) – Axons (conduct messages away from cell body) – Myelin Sheath (insulation layer composed of Schwann Cells) – Synaptic Terminal (relays signals to other cells by releasing neurotransmitters) – Synapse (site of contact between terminal & target cell) – Nodes ...
... – Dendrites (conveys signal to cell body) – Axons (conduct messages away from cell body) – Myelin Sheath (insulation layer composed of Schwann Cells) – Synaptic Terminal (relays signals to other cells by releasing neurotransmitters) – Synapse (site of contact between terminal & target cell) – Nodes ...
Nervous System
... There are small gaps, called nodes of Ranvier, between individual Schwann cells. Conduction velocity goes from about 5m/s without the myelin sheath to ~150m/s with it. ...
... There are small gaps, called nodes of Ranvier, between individual Schwann cells. Conduction velocity goes from about 5m/s without the myelin sheath to ~150m/s with it. ...
eprint_11_20575_1347
... – Between axon terminals of one neuron and dendrites of another – Most common type of synapse • Axosomatic – Between axons and neuronal cell bodies • Axoaxonic, dendrodendritic, and dendrosomatic – Less common types of synapses – Function not as well understood ...
... – Between axon terminals of one neuron and dendrites of another – Most common type of synapse • Axosomatic – Between axons and neuronal cell bodies • Axoaxonic, dendrodendritic, and dendrosomatic – Less common types of synapses – Function not as well understood ...
Chapter 48: Nervous System
... regenerates itself as it moves along the axon, increasing action potential as it moves down axons What effects speed of transmission? Diameter of axon Myelin sheath ...
... regenerates itself as it moves along the axon, increasing action potential as it moves down axons What effects speed of transmission? Diameter of axon Myelin sheath ...
Organization of the Nervous System
... Axon: Carries information from the cell body to a neighboring neuron. Myelin Sheath: Insulating fat cells that increase the rate of signal transmissions. Node of Ranvier: Bare axon; allows action potential to jump from node to node. Axon Terminals: Release chemicals called neurotransmitters. ...
... Axon: Carries information from the cell body to a neighboring neuron. Myelin Sheath: Insulating fat cells that increase the rate of signal transmissions. Node of Ranvier: Bare axon; allows action potential to jump from node to node. Axon Terminals: Release chemicals called neurotransmitters. ...
Organization of the Nervous System
... Axon: Carries information from the cell body to a neighboring neuron. Myelin Sheath: Insulating fat cells that increase the rate of signal transmissions. Node of Ranvier: Bare axon; allows action potential to jump from node to node. Axon Terminals: Release chemicals called neurotransmitters. ...
... Axon: Carries information from the cell body to a neighboring neuron. Myelin Sheath: Insulating fat cells that increase the rate of signal transmissions. Node of Ranvier: Bare axon; allows action potential to jump from node to node. Axon Terminals: Release chemicals called neurotransmitters. ...
Nervous System I
... • Cell body damage = cell death –Cell not replaced unless neural stem cells stimulated • Axons can regenerate…slowly –Often don’t end up in right place –In CNS regeneration is unlikely because oligodendrocytes don’t proliferate like Schwann cells to form sheaths for guidance ...
... • Cell body damage = cell death –Cell not replaced unless neural stem cells stimulated • Axons can regenerate…slowly –Often don’t end up in right place –In CNS regeneration is unlikely because oligodendrocytes don’t proliferate like Schwann cells to form sheaths for guidance ...
Message Transmission
... – Get enough and you have reached the threshold potential. Once you've reached here, the nerve acts. (Action potential starts but is localized) ...
... – Get enough and you have reached the threshold potential. Once you've reached here, the nerve acts. (Action potential starts but is localized) ...
The Nervous System
... • 2. Integrative-in the spinal cord or brain, we put information together and make sense of it • 3. Motor-carry impulses to effectors such as muscles and glands ...
... • 2. Integrative-in the spinal cord or brain, we put information together and make sense of it • 3. Motor-carry impulses to effectors such as muscles and glands ...
Structure of a Neuron
... 3. Dendrite: receives impulses from other neurons and carries them toward the cell body ...
... 3. Dendrite: receives impulses from other neurons and carries them toward the cell body ...
Document
... c) Ion channels in the membrane are selective. 2. The potassium equilibrium potential is the membrane potential at which the net movement of potassium ceases. 3. Some ion channels are “gated” a) Voltage gated channels b) Chemically gated channels c) Mechanically gated channels 4. Gated ion channels ...
... c) Ion channels in the membrane are selective. 2. The potassium equilibrium potential is the membrane potential at which the net movement of potassium ceases. 3. Some ion channels are “gated” a) Voltage gated channels b) Chemically gated channels c) Mechanically gated channels 4. Gated ion channels ...
REVIEW OF Nervous system anatomy File
... wrapping its plasma membrane loosely around it in successive layers. ...
... wrapping its plasma membrane loosely around it in successive layers. ...
Chap 41 - Iowa State University
... 1. Nervous System is the response to changes in internal and external environments. What are the two categories the nervous system is broken into? Explain what each consists of. ...
... 1. Nervous System is the response to changes in internal and external environments. What are the two categories the nervous system is broken into? Explain what each consists of. ...
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. ...
6.2 Transmission of Nerve Impulses
... 1. A neuron at rest has more sodium ions (Na+) outside the membrane than potassium (K+) ions inside, therefore there is a more negative charge inside the neuron - The neuron is said to be polarized 2. If stimulus is received it must reach a critical voltage before it will have an effect on the neuro ...
... 1. A neuron at rest has more sodium ions (Na+) outside the membrane than potassium (K+) ions inside, therefore there is a more negative charge inside the neuron - The neuron is said to be polarized 2. If stimulus is received it must reach a critical voltage before it will have an effect on the neuro ...
Nervous System - De Anza College
... Depolarization and repolarization continues down the axon; propagation of action potential down the length of the axon ...
... Depolarization and repolarization continues down the axon; propagation of action potential down the length of the axon ...
Neurons - World of Teaching
... abundance of + charges compared to inside. The inside of the membrane is negative compared to the outside. This is helped by the (-) proteins etc. The “sodium-potassium” pump pulls 2 K+ ions in for 3 Na+ ions sent out. This further creates a charge difference!! ...
... abundance of + charges compared to inside. The inside of the membrane is negative compared to the outside. This is helped by the (-) proteins etc. The “sodium-potassium” pump pulls 2 K+ ions in for 3 Na+ ions sent out. This further creates a charge difference!! ...
Biology 3201 - s3.amazonaws.com
... abundance of + charges compared to inside. The inside of the membrane is negative compared to the outside. This is helped by the (-) proteins etc. The “sodium-potassium” pump pulls 2 K+ ions in for 3 Na+ ions sent out. This further creates a charge difference!! ...
... abundance of + charges compared to inside. The inside of the membrane is negative compared to the outside. This is helped by the (-) proteins etc. The “sodium-potassium” pump pulls 2 K+ ions in for 3 Na+ ions sent out. This further creates a charge difference!! ...
The Nervous System The master and
... The master _________________ and _________________ system of the body Method of communication? _________________ impulses The Three Overlapping Functions It uses millions of sensory receptors to _________________ _________________ called _________________ inside and outside the body. It ____________ ...
... The master _________________ and _________________ system of the body Method of communication? _________________ impulses The Three Overlapping Functions It uses millions of sensory receptors to _________________ _________________ called _________________ inside and outside the body. It ____________ ...
Electrical Communication #2
... This terminal area links one neuron to another, enabling intercellular communication. These areas of contact are called synapses, and you have about 1014 of them in your brain –– three orders of magnitude more than neurons. ...
... This terminal area links one neuron to another, enabling intercellular communication. These areas of contact are called synapses, and you have about 1014 of them in your brain –– three orders of magnitude more than neurons. ...
Neural Tissue
... Collections of cell bodies - ganglion in PNS, center or nucleus in CNS Bundles of axons - tracts in CNS, nerves in PNS “White” = myelinated axons, both nerves and tracts ...
... Collections of cell bodies - ganglion in PNS, center or nucleus in CNS Bundles of axons - tracts in CNS, nerves in PNS “White” = myelinated axons, both nerves and tracts ...
Neurons: What They`re Made Of and How They
... much faster than unmyelinated axons, because of the sheath. The sheath is made up of cells called "Schwann cells." The plasma membrane of these cells is enlarged and wraps around the axon many times. Between each Schwann cell, there is a gap called the "node of Ranvier." An impulse is able to jump f ...
... much faster than unmyelinated axons, because of the sheath. The sheath is made up of cells called "Schwann cells." The plasma membrane of these cells is enlarged and wraps around the axon many times. Between each Schwann cell, there is a gap called the "node of Ranvier." An impulse is able to jump f ...
Node of Ranvier
The nodes of Ranvier also known as myelin sheath gaps, are the gaps (approximately 1 micrometer in length) formed between the myelin sheaths generated by different cells. A myelin sheath is a many-layered coating, largely composed of a fatty substance called myelin, that wraps around the axon of a neuron and very efficiently insulates it. At nodes of Ranvier, the axonal membrane is uninsulated and, therefore, capable of generating electrical activity.