013368718X_CH31_483
... F. Nerves and supporting cells that collect information about the body’s environment G. Chemical that transmits an impulse across a synapse to another cell H. Tough, transparent layer of cells through which light enters the eye ...
... F. Nerves and supporting cells that collect information about the body’s environment G. Chemical that transmits an impulse across a synapse to another cell H. Tough, transparent layer of cells through which light enters the eye ...
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 ...
Neurons & Transmission of Information
... impulses (sends messages) through the nervous system •contains 3 major parts--cell body, dendrites, & an axon –Cell body = contains the nucleus & carries out the metabolic (life-sustaining) functions of the neuron –dendrites = receivers of signals from other neurons (look like tree branches) –axon = ...
... impulses (sends messages) through the nervous system •contains 3 major parts--cell body, dendrites, & an axon –Cell body = contains the nucleus & carries out the metabolic (life-sustaining) functions of the neuron –dendrites = receivers of signals from other neurons (look like tree branches) –axon = ...
The Nervous System
... impulses away from the cell body is the axon – Ends in a series of small areas called axon terminals – Some axons have an insulating membrane called the myelin sheath • The sheath leaves exposed parts of the axon called nodes where a nerve impulse can “jump” from one node to the next ...
... impulses away from the cell body is the axon – Ends in a series of small areas called axon terminals – Some axons have an insulating membrane called the myelin sheath • The sheath leaves exposed parts of the axon called nodes where a nerve impulse can “jump” from one node to the next ...
Nervous Systems
... cell body: contains nucleus & organelles dendrites: receive incoming messages axons: transmit messages away to other cells myelin sheath: fatty insulation covering axon, speeds up nerve impulses synapse: junction between 2 neurons neurotransmitter: chemical messengers sent across synapse Glia: cells ...
... cell body: contains nucleus & organelles dendrites: receive incoming messages axons: transmit messages away to other cells myelin sheath: fatty insulation covering axon, speeds up nerve impulses synapse: junction between 2 neurons neurotransmitter: chemical messengers sent across synapse Glia: cells ...
ANATOMICAL ORGANIZATION of the NERVOUS SYSTEM
... Branches off the cell body that carry information to the cell body. Usually several to many. Relatively short. Often branched. Have receptors for neurotransmitters. Conduct local potentials. ...
... Branches off the cell body that carry information to the cell body. Usually several to many. Relatively short. Often branched. Have receptors for neurotransmitters. Conduct local potentials. ...
Brains, Synapses and Neurotransmitters
... how the nervous system works The nervous system is made up, basically, of two types of cells • Neurons ...
... how the nervous system works The nervous system is made up, basically, of two types of cells • Neurons ...
Nervous System Ch 10 Notes - Reading Community Schools
... Neuron Structure • Axon • Axon terminal • End of an axon with many branching fibers • End expands to form synaptic end bulb • Nerve Fiber • Common name for an axon and its myelin sheath ...
... Neuron Structure • Axon • Axon terminal • End of an axon with many branching fibers • End expands to form synaptic end bulb • Nerve Fiber • Common name for an axon and its myelin sheath ...
Module 4 Neural and Hormonal Systems
... Neuron: the basic building block of the nervous system. Each consists of a cell body and branching fibres. The dendrites are the bushy, branching extensions that receive messages and conduct impulses toward the cell body. For the biology students: dendrites are complex microtubules, proof that neuro ...
... Neuron: the basic building block of the nervous system. Each consists of a cell body and branching fibres. The dendrites are the bushy, branching extensions that receive messages and conduct impulses toward the cell body. For the biology students: dendrites are complex microtubules, proof that neuro ...
Sending Signals Notes
... • When an impulse reaches the Axon Terminal, dozen of vesicles fuse with the cell membrane and discharge the Neurotransmitter into the Synaptic Cleft (GAP). • The molecules of the neurotransmitter diffuse across the gap and attach themselves to SPECIAL RECEPTORS on the membrane of the neuron recei ...
... • When an impulse reaches the Axon Terminal, dozen of vesicles fuse with the cell membrane and discharge the Neurotransmitter into the Synaptic Cleft (GAP). • The molecules of the neurotransmitter diffuse across the gap and attach themselves to SPECIAL RECEPTORS on the membrane of the neuron recei ...
click - Uplift Education
... 15) When a neuron is at resting membrane potential, which ions are more concentrated in the interstitial fluid (outside the cell)? When a neuron is a resting membrane potential, which ions are more concentrated in the cytosol (inside the cell)? What processes position the ions in these locations? 16 ...
... 15) When a neuron is at resting membrane potential, which ions are more concentrated in the interstitial fluid (outside the cell)? When a neuron is a resting membrane potential, which ions are more concentrated in the cytosol (inside the cell)? What processes position the ions in these locations? 16 ...
Chapter 11: Fundamentals of the Nervous System and Nervous Tissue
... ______6. A major subdivision of the nervous system that serves as the communication lines, linking all parts of the body to the CNS. 3. This exercise emphasizes the difference between neurons and neuroglia. Indicate which cell type is identified by the following descriptions. A. Neurons B. Neuroglia ...
... ______6. A major subdivision of the nervous system that serves as the communication lines, linking all parts of the body to the CNS. 3. This exercise emphasizes the difference between neurons and neuroglia. Indicate which cell type is identified by the following descriptions. A. Neurons B. Neuroglia ...
Document
... 2. Begins with initial segment 3. May be absent (amacrine cells) 4. Unique in most cells 5. May be myelinated or no 6. Never contains ribosomes 7. Smooth contours, cylindrical shape 8. The thinnest process at the origin 9. Ramifies by branching at obtuse angles 10. Gives rise to branches of same dia ...
... 2. Begins with initial segment 3. May be absent (amacrine cells) 4. Unique in most cells 5. May be myelinated or no 6. Never contains ribosomes 7. Smooth contours, cylindrical shape 8. The thinnest process at the origin 9. Ramifies by branching at obtuse angles 10. Gives rise to branches of same dia ...
Ch. 27 notes - The Nervous System
... vii. In this way, the action potential is self-propagated along the axon until it reaches the end. It is described as an “all-or-nothing” event: if the action potential forms, it will travel the length of the axon. viii. The myelin sheath speeds the transmission by restricting the opening of the gat ...
... vii. In this way, the action potential is self-propagated along the axon until it reaches the end. It is described as an “all-or-nothing” event: if the action potential forms, it will travel the length of the axon. viii. The myelin sheath speeds the transmission by restricting the opening of the gat ...
Neurology - wsscience
... An inhibitory postsynaptic potential )IPSP) is a: Depolarization produced by the effect of a neurotransmitter Transient hyperpolarization of the postsynaptic membrane Repolarization produced by the addition of multiple stimul Reflection of the activation of an opposing transmembrane potential ...
... An inhibitory postsynaptic potential )IPSP) is a: Depolarization produced by the effect of a neurotransmitter Transient hyperpolarization of the postsynaptic membrane Repolarization produced by the addition of multiple stimul Reflection of the activation of an opposing transmembrane potential ...
The Nervous System
... They all carry electro-chemical nerve signals, but differ in structure (the number of processes, or axons, emanating from the cell body) and are found in different parts of the body. ...
... They all carry electro-chemical nerve signals, but differ in structure (the number of processes, or axons, emanating from the cell body) and are found in different parts of the body. ...
File
... -- if an action potential is generated, it will originate within the axon hillock, which will then pass the signal on to the axon. -- the axon carries the action potential from the cell body/axon hillock to its bulb-like synaptic endings (located at the end of an axon). -- axons are typically long, ...
... -- if an action potential is generated, it will originate within the axon hillock, which will then pass the signal on to the axon. -- the axon carries the action potential from the cell body/axon hillock to its bulb-like synaptic endings (located at the end of an axon). -- axons are typically long, ...
Peripheral Nervous System
... axon per neuron Rare branches, if present, are called axon collaterals Axonal terminal – branched terminus of an axon ...
... axon per neuron Rare branches, if present, are called axon collaterals Axonal terminal – branched terminus of an axon ...
Nervous Dia rams
... The nerve celt that connects sensory and motor neurons The nerve cell that transmits impulses from the brain or spinal cord to a muscle or gland ...
... The nerve celt that connects sensory and motor neurons The nerve cell that transmits impulses from the brain or spinal cord to a muscle or gland ...
Chapter Eleven
... • It is generated by different concentrations of Na+, K+, Cl, and protein anions (A) • Ionic differences are the consequence of: – Differential __________________________ of the neurilemma to Na+ and K+ – Operation of the _ ...
... • It is generated by different concentrations of Na+, K+, Cl, and protein anions (A) • Ionic differences are the consequence of: – Differential __________________________ of the neurilemma to Na+ and K+ – Operation of the _ ...
PowerPoint
... called the Synapse. • One importance of the presence of Synapses is that they ensure one-way transmission of impulses in a living person. • The Axon Terminals at a Synapse contain tiny vesicles, or sacs. These are known as NEUROTRANSMITTERS. ...
... called the Synapse. • One importance of the presence of Synapses is that they ensure one-way transmission of impulses in a living person. • The Axon Terminals at a Synapse contain tiny vesicles, or sacs. These are known as NEUROTRANSMITTERS. ...
Axon
.svg?width=300)
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.