Nervous System ch 11
... •Microglia – small, ovoid cells with spiny processes –Phagocytes; monitor the health of neurons •Ependymal cells –squamous or columnar –They line the central cavities of the brain and spinal column Oligodendrocytes, Schwann Cells, and Satellite Cells •Oligodendrocytes – branched cells that wrap CNS ...
... •Microglia – small, ovoid cells with spiny processes –Phagocytes; monitor the health of neurons •Ependymal cells –squamous or columnar –They line the central cavities of the brain and spinal column Oligodendrocytes, Schwann Cells, and Satellite Cells •Oligodendrocytes – branched cells that wrap CNS ...
Neuro 1 - Somerset Academy
... – The Na+ channels automatically close – K+ channels begin to open K+ leaves the cell carrying with it the positive ...
... – The Na+ channels automatically close – K+ channels begin to open K+ leaves the cell carrying with it the positive ...
Nervous Tissue (Ch
... B. 2 major cell types - neurons -- conduct action potentials - neuroglia -- nervous connective tissue “glue” ...
... B. 2 major cell types - neurons -- conduct action potentials - neuroglia -- nervous connective tissue “glue” ...
Unit 2-Week 1 Notes Sheets
... Topic: ____________________________________________________ Date: ______________________ ...
... Topic: ____________________________________________________ Date: ______________________ ...
Neural-Ville
... 3. It may bind to the first cell's autoreceptors, which tell that cell not to release any more of the neurotransmitter molecules, then leave the autoreceptor and continue trying to bind again somewhere until its activity is ended by step 4, 5 or 6. ...
... 3. It may bind to the first cell's autoreceptors, which tell that cell not to release any more of the neurotransmitter molecules, then leave the autoreceptor and continue trying to bind again somewhere until its activity is ended by step 4, 5 or 6. ...
A2.2.2.SecretSignals - jj-sct
... Electrical messages are sent to and from the brain and the spinal cord at an amazing speed. Some of these signals can travel as fast as 250 miles per hour. It is no wonder that you are able to react to stimuli very quickly. Neurons work together to send messages in a hurry, allowing a race car drive ...
... Electrical messages are sent to and from the brain and the spinal cord at an amazing speed. Some of these signals can travel as fast as 250 miles per hour. It is no wonder that you are able to react to stimuli very quickly. Neurons work together to send messages in a hurry, allowing a race car drive ...
Candy Neurons Activity
... Students work in pairs of two to create their candy neurons. They must be labeled and contain all key parts. Once they are done they must link of their diagram with another two groups. When you have a group of 6 come by for some direct instruction showing that neurons fire DAT way. Dendrites t ...
... Students work in pairs of two to create their candy neurons. They must be labeled and contain all key parts. Once they are done they must link of their diagram with another two groups. When you have a group of 6 come by for some direct instruction showing that neurons fire DAT way. Dendrites t ...
Untitled 2
... - In the brain finer dendrites are highly specialised for collecting information, bristling with dendrites spines which represent points of close contact - synapses - with other neurons ...
... - In the brain finer dendrites are highly specialised for collecting information, bristling with dendrites spines which represent points of close contact - synapses - with other neurons ...
Nerve Flash Cards
... How does the signal go through the space? By a chemical transmission. The synaptic knob has vesicles filled with a neurotransmitter that carries the signal. Each type of neuron used particular types of neurotransmitters, so there are 100’s of types. ...
... How does the signal go through the space? By a chemical transmission. The synaptic knob has vesicles filled with a neurotransmitter that carries the signal. Each type of neuron used particular types of neurotransmitters, so there are 100’s of types. ...
Neuron Labeling WS
... The long fiber that carries the nerve impulses. A bundle of axons. The connection between adjacent neurons. The chemical secreted into the gap between neurons at a synapse. A rapid automatic response to a stimulus. The covering of fatty material that speeds up the passage of nerve impulses. The stru ...
... The long fiber that carries the nerve impulses. A bundle of axons. The connection between adjacent neurons. The chemical secreted into the gap between neurons at a synapse. A rapid automatic response to a stimulus. The covering of fatty material that speeds up the passage of nerve impulses. The stru ...
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!! ...
No Slide Title
... the outside, it is selectively permeable with charged ions only able to pass through protein channels. ...
... the outside, it is selectively permeable with charged ions only able to pass through protein channels. ...
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!! ...
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 ...
Mind, Brain & Behavior
... expression of cell adhesion molecules (CAM). Chemical markers in the axon and the targets guide axon growth. Diffusable molecules called netrins also attract axons. Absence of laminin at target may retard further growth. ...
... expression of cell adhesion molecules (CAM). Chemical markers in the axon and the targets guide axon growth. Diffusable molecules called netrins also attract axons. Absence of laminin at target may retard further growth. ...
Brain Questions
... 3- The central nervous system is composed of what? The peripheral nervous system is composed of what? 4- What is the axon of a neuron wrapped in? What is its function? 5- How do signals travel down the axon? 6- What role do dendrites have in cell to cell communication? 7- What is the difference betw ...
... 3- The central nervous system is composed of what? The peripheral nervous system is composed of what? 4- What is the axon of a neuron wrapped in? What is its function? 5- How do signals travel down the axon? 6- What role do dendrites have in cell to cell communication? 7- What is the difference betw ...
Neural Tissue
... Cell body or Soma with Perikaryon Dendrites Axon with axon hillock Synaptic terminals ...
... Cell body or Soma with Perikaryon Dendrites Axon with axon hillock Synaptic terminals ...
Nervous System
... • Once the neuron’s membrane is depolarized to the threshold level, an action potential occurs. • An electrical signal travels via the axon to the next neuron. – At the end of the axon, the signal causes the release of neurotransmitters that jump the space between cells called the synapse ...
... • Once the neuron’s membrane is depolarized to the threshold level, an action potential occurs. • An electrical signal travels via the axon to the next neuron. – At the end of the axon, the signal causes the release of neurotransmitters that jump the space between cells called the synapse ...
Notes – Neurons and the nervous system
... At rest, the fluid inside a neuron has an excess of negatively charged ions. i.e. a negative resting potential When a neuron is in its resting state, sodium channels are blocked, thus keeping excess positive ions out of the cell. When a nearby neuron fires an action potential, this triggers so ...
... At rest, the fluid inside a neuron has an excess of negatively charged ions. i.e. a negative resting potential When a neuron is in its resting state, sodium channels are blocked, thus keeping excess positive ions out of the cell. When a nearby neuron fires an action potential, this triggers so ...
2. Peripheral Nervous System
... 4) Refractory period – When the Na+/K+ balance returns to normal (K+ on inside and Na+ outside) • During this time the neuron will not respond to new impulses ...
... 4) Refractory period – When the Na+/K+ balance returns to normal (K+ on inside and Na+ outside) • During this time the neuron will not respond to new impulses ...
Chapter 3 Notes (part 1) 1. Basic Elements of the Nervous System (a
... selectively-permeable membrane which separates the cytoplasm from the extracellular matrix contains ion channels and protein pumps which manage the flow of ions (charged particles) into and out of the cell C. Axon The part of the cell which carries the electrical signal (action potential); in ...
... selectively-permeable membrane which separates the cytoplasm from the extracellular matrix contains ion channels and protein pumps which manage the flow of ions (charged particles) into and out of the cell C. Axon The part of the cell which carries the electrical signal (action potential); in ...
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.