General design of the nervous system
... The more channels there are, the larger the current. Action potential conduction 1. initiated in axon ...
... The more channels there are, the larger the current. Action potential conduction 1. initiated in axon ...
NERVOUS SYSTEM
... VI. Nerve Impulse – a self-propagating wave of electrical disturbance that travels along the surface of a neuron membrane A.Physiology – neurons have two major functional properties: 1.Irritability – the ability to respond to a stimulus and convert it into a nerve impulse (electrochemical event) ...
... VI. Nerve Impulse – a self-propagating wave of electrical disturbance that travels along the surface of a neuron membrane A.Physiology – neurons have two major functional properties: 1.Irritability – the ability to respond to a stimulus and convert it into a nerve impulse (electrochemical event) ...
9.01 Introduction to Neuroscience
... 1) The neuron doctrine states that a) Neurites are fused together to form a continuous network b) Neurites are not continuous and communicate by contact c) Neurons must contain a soma, an axon, and dendrites d) DNA is transcribed to mRNA which is translated into protein 2) On September 13, 1848, Phi ...
... 1) The neuron doctrine states that a) Neurites are fused together to form a continuous network b) Neurites are not continuous and communicate by contact c) Neurons must contain a soma, an axon, and dendrites d) DNA is transcribed to mRNA which is translated into protein 2) On September 13, 1848, Phi ...
Nervous System Overview WS
... ____________ 1. Specialized cells that myelinate the fibers of neurons found in the PNS ____________ 2. Junction or point of close contact between neurons ____________ 3. Neuron found between sensory and motor neurons ____________ 4. Gaps in the myelin sheath ____________ 5. Neuron that conducts imp ...
... ____________ 1. Specialized cells that myelinate the fibers of neurons found in the PNS ____________ 2. Junction or point of close contact between neurons ____________ 3. Neuron found between sensory and motor neurons ____________ 4. Gaps in the myelin sheath ____________ 5. Neuron that conducts imp ...
Nervous Tissue (Ch
... - electrically insulates axons - increase speed, decrease energy of conduction A. formed by Schwann cells in PNS - myelin sheath = compacted membranes - neurilemma = outer layer of cytoplasm + nucleus - node of Ranvier = bare axolemma Schwann cell can also protect nerve fibers without forming myel ...
... - electrically insulates axons - increase speed, decrease energy of conduction A. formed by Schwann cells in PNS - myelin sheath = compacted membranes - neurilemma = outer layer of cytoplasm + nucleus - node of Ranvier = bare axolemma Schwann cell can also protect nerve fibers without forming myel ...
Nervous System
... (b) In an unmyelinated axon, voltage-gated Na+ and K+ channels regenerate the action potential at each point along the axon, so voltage does not decay. Conduction is slow because movements of ions and of the gates of channel proteins take time and must occur before voltage regeneration occurs. Copyr ...
... (b) In an unmyelinated axon, voltage-gated Na+ and K+ channels regenerate the action potential at each point along the axon, so voltage does not decay. Conduction is slow because movements of ions and of the gates of channel proteins take time and must occur before voltage regeneration occurs. Copyr ...
THE NERVOUS SYSTEM: Communication
... sensations, create thoughts, add to memory, make decisions, etc. Association neuron or interneuron 3. Motor Function – responses to signals (impulses). Signals sent from the CNS to effectors (muscles or glands). The goal is usually to maintain stable conditions (especially internal) – Homeostasis. M ...
... sensations, create thoughts, add to memory, make decisions, etc. Association neuron or interneuron 3. Motor Function – responses to signals (impulses). Signals sent from the CNS to effectors (muscles or glands). The goal is usually to maintain stable conditions (especially internal) – Homeostasis. M ...
Nervous System Review CNS PNS Terms to know Neurons Action
... The sub-division of the PNS that carries impulses toward the CNS is called? A. Motor(efferent) division B. Sensory (afferent) division C. PNS ...
... The sub-division of the PNS that carries impulses toward the CNS is called? A. Motor(efferent) division B. Sensory (afferent) division C. PNS ...
10.2 Neurones
... single long fibre called an axon and smaller branched fibres called (4). Axons are surrounded by (5) cells, which protect and provide (6) because their membranes are rich in a lipid called (7). There are three types of neurone. Those that carry nerve impulses to the effectors are called (8) neurones ...
... single long fibre called an axon and smaller branched fibres called (4). Axons are surrounded by (5) cells, which protect and provide (6) because their membranes are rich in a lipid called (7). There are three types of neurone. Those that carry nerve impulses to the effectors are called (8) neurones ...
nervous07
... Some neurons have many dendrites. Some dendrites have many branches. Ultrastructure similar to cell body. ...
... Some neurons have many dendrites. Some dendrites have many branches. Ultrastructure similar to cell body. ...
section1
... • Usually there is only one unbranched axon per neuron • Rare branches, if present, are called axon collaterals • Axonal terminal – branched terminus of an axon ...
... • Usually there is only one unbranched axon per neuron • Rare branches, if present, are called axon collaterals • Axonal terminal – branched terminus of an axon ...
Nervous System Notes - Mrs. Franco's Biology & Anatomy Page
... cells found around cell bodies of neurons in ganglia Ganglia = bunched up cell bodies in PNS ...
... cells found around cell bodies of neurons in ganglia Ganglia = bunched up cell bodies in PNS ...
Powerpoint
... – Na+ permeability suddenly increases, resulting in an inward rush (action potential) ...
... – Na+ permeability suddenly increases, resulting in an inward rush (action potential) ...
The Neuron Label Worksheet
... protects some nerve fibers axon terminals - the hair-like ends of node of Ranvier - one of the many gaps in the myelin the axon sheath – impulses jump from node to node resulting in cell body - the cell body of the faster transmission neuron; it contains the nucleus and nucleus - the organelle in th ...
... protects some nerve fibers axon terminals - the hair-like ends of node of Ranvier - one of the many gaps in the myelin the axon sheath – impulses jump from node to node resulting in cell body - the cell body of the faster transmission neuron; it contains the nucleus and nucleus - the organelle in th ...
File
... and axon. What are the functions of each component? Answer: Cell body- control center (nucleus & cytoplasm). Axons- extends from cell body & produces nerve terminals. Dendrite- receives messages from other neurons. ...
... and axon. What are the functions of each component? Answer: Cell body- control center (nucleus & cytoplasm). Axons- extends from cell body & produces nerve terminals. Dendrite- receives messages from other neurons. ...
Periodic Table Test CNS PNS Terms to know Neurons Action
... Resting membrane Depolarization Repolarization ...
... Resting membrane Depolarization Repolarization ...
PNS and Transmission
... • Sympathetic: most arise from the lower thoracic or lumbar region. Highly involved in the fight or flight reflex. • Parasympathetic: Craniosacral; promotes all the internal responses we associated with a relaxed state. • Commonalities: 1) they function automatically and usually involuntary, 2) they ...
... • Sympathetic: most arise from the lower thoracic or lumbar region. Highly involved in the fight or flight reflex. • Parasympathetic: Craniosacral; promotes all the internal responses we associated with a relaxed state. • Commonalities: 1) they function automatically and usually involuntary, 2) they ...
20141013134817
... a. Effectors are Muscles or Glands. These structures can have an effect on your body. D. Peripheral Nervous System (PNS) 1. This includes the Sensory receptors and Motor Nerves. ...
... a. Effectors are Muscles or Glands. These structures can have an effect on your body. D. Peripheral Nervous System (PNS) 1. This includes the Sensory receptors and Motor Nerves. ...
Notes
... 1. Action Potential (Impulse) – rapid reversal and return of the membrane potential A) Created by the movement of ions B) Cells normally have large amounts of Na+ outside and K+ inside 1) Creates a resting membrane potential (voltage difference) of -70mV on the inside of the cell 2) This value chang ...
... 1. Action Potential (Impulse) – rapid reversal and return of the membrane potential A) Created by the movement of ions B) Cells normally have large amounts of Na+ outside and K+ inside 1) Creates a resting membrane potential (voltage difference) of -70mV on the inside of the cell 2) This value chang ...
48 Nervous System PowerPoint
... 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? What is a synapse? ...
... 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? What is a synapse? ...
1 Absolute refractory period a. Time during which a second
... WHERE DOES THE SPINAL L2 CORD END? produce myelin sheath around axons of PNS neurons. ...
... WHERE DOES THE SPINAL L2 CORD END? produce myelin sheath around axons of PNS neurons. ...
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.