Fundamentals of the Nervous System
... potential away from cell body to axonal terminal (generates action potential) - Axon hillock arises from the cell body into the axon (graded potential) - Profuse branching at end of axon called terminal branches or telodendria. At the tips there are bulbous structures storing neurotransmitters. ...
... potential away from cell body to axonal terminal (generates action potential) - Axon hillock arises from the cell body into the axon (graded potential) - Profuse branching at end of axon called terminal branches or telodendria. At the tips there are bulbous structures storing neurotransmitters. ...
Nerve tissue
... Ultrastructure of the MEP. The drawing at the upper right shows branching of a small nerve with a MEP for each muscle fiber. The structure of one of the bulbs of an end-plate is highly enlarged in the center drawing. Note that the axon terminal bud contains synaptic vesicles. The region of the musc ...
... Ultrastructure of the MEP. The drawing at the upper right shows branching of a small nerve with a MEP for each muscle fiber. The structure of one of the bulbs of an end-plate is highly enlarged in the center drawing. Note that the axon terminal bud contains synaptic vesicles. The region of the musc ...
chapter-11-functional-organization-of-nervous
... Protect the axon Electrically insulate fibers from one another Increase the speed of nerve impulse transmission Formed by Schwann cells in the PNS ...
... Protect the axon Electrically insulate fibers from one another Increase the speed of nerve impulse transmission Formed by Schwann cells in the PNS ...
Schwann cells - Dr. Par Mohammadian
... myelin sheath • Neurilemma – remaining nucleus and cytoplasm of a Schwann cell • Nodes of Ranvier: Gaps in the myelin sheath between adjacent Schwann cells ...
... myelin sheath • Neurilemma – remaining nucleus and cytoplasm of a Schwann cell • Nodes of Ranvier: Gaps in the myelin sheath between adjacent Schwann cells ...
Central nervous system
... allows sodium (Na+) to flow inside the membrane • The exchange of ions initiates an action potential in the neuron Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings ...
... allows sodium (Na+) to flow inside the membrane • The exchange of ions initiates an action potential in the neuron Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings ...
The Nervous System: Organization and Tissues
... Electrical currents correspond to the flow ions across cellular membranes Ion channels allow the flow of ions into and out of the cell ...
... Electrical currents correspond to the flow ions across cellular membranes Ion channels allow the flow of ions into and out of the cell ...
File
... 1. polarization 2. depolarization (RMP) 3. repolarization, 4. hyperpolarization, 5. sodium-potassium pump (Na+K+) 12. When K+(dudes) leaves the cell. 13. Restores resting membrane potential. (police and bouncers) 14. When the charge inside the cell is -70. 15. When Na+ enters the cell. (guys come in ...
... 1. polarization 2. depolarization (RMP) 3. repolarization, 4. hyperpolarization, 5. sodium-potassium pump (Na+K+) 12. When K+(dudes) leaves the cell. 13. Restores resting membrane potential. (police and bouncers) 14. When the charge inside the cell is -70. 15. When Na+ enters the cell. (guys come in ...
Biology 3201
... This causes outside of membrane to have an abundance of + charges compared to inside. The inside of the membrane is negative compared to the outside (this is helped by the (-)’ly charged proteins, etc. on the inside) The “sodium-potassium” pump pulls 2 K+ ions in for 3 Na+ ions sent out. This furthe ...
... This causes outside of membrane to have an abundance of + charges compared to inside. The inside of the membrane is negative compared to the outside (this is helped by the (-)’ly charged proteins, etc. on the inside) The “sodium-potassium” pump pulls 2 K+ ions in for 3 Na+ ions sent out. This furthe ...
Neurons
... cells : 1.neurons and 2.glial cells • extracellular material is extremely reduced replaced by glial branched process • neurons receive stimuli and conduct nerve impulse via their processes • action potential transmission to the next cell through synapses (= intercellular contacts) • extensive vascul ...
... cells : 1.neurons and 2.glial cells • extracellular material is extremely reduced replaced by glial branched process • neurons receive stimuli and conduct nerve impulse via their processes • action potential transmission to the next cell through synapses (= intercellular contacts) • extensive vascul ...
Organization of the Nervous System
... Most abundant cells in the nervous system CNS production and circulation of cerebrospinal fluid (CSF) 2 types (PNS) Satellite Cells Schwann Cells ...
... Most abundant cells in the nervous system CNS production and circulation of cerebrospinal fluid (CSF) 2 types (PNS) Satellite Cells Schwann Cells ...
Electrochemical Impulses
... 3. A reversal of charge occurs, called depolarization (this is the ‘firing’ of the neuron) 4. Once the inside of the neuron becomes positive, the Na+ gates close. 5. A Na+ - K+ pump in the cell membrane moves sodium out and potassium in, restoring the resting potential (called re-polarization) ...
... 3. A reversal of charge occurs, called depolarization (this is the ‘firing’ of the neuron) 4. Once the inside of the neuron becomes positive, the Na+ gates close. 5. A Na+ - K+ pump in the cell membrane moves sodium out and potassium in, restoring the resting potential (called re-polarization) ...
Ion channels
... In case negative and positive charges are separated from each other, their coming together liberates energy Thus, separated opposing electrical charges carry a potential energy ...
... In case negative and positive charges are separated from each other, their coming together liberates energy Thus, separated opposing electrical charges carry a potential energy ...
4.BiologicalPsycholo..
... with the outside. Electrochemical changes in a neuron generate an action potential. When positively charged sodium ions (Na+) rush into the cell, its interior briefly becomes positive. This is the action potential. After the action potential, positive potassium ions (K+) flow out of the axon and res ...
... with the outside. Electrochemical changes in a neuron generate an action potential. When positively charged sodium ions (Na+) rush into the cell, its interior briefly becomes positive. This is the action potential. After the action potential, positive potassium ions (K+) flow out of the axon and res ...
Homeostasis Test%28CNS%29-Tawsif Hossain
... peripheral nervous system as well j) More than one correct option-Incorrect, only f is correct ...
... peripheral nervous system as well j) More than one correct option-Incorrect, only f is correct ...
Nerve Tissue Part 1
... Stimulation leads to generation of action potential (nerve impulse) conducted along the axon ...
... Stimulation leads to generation of action potential (nerve impulse) conducted along the axon ...
Module 9 - Moline High School
... • Fiber that communicates the signal down the neuron and away from the cell body ...
... • Fiber that communicates the signal down the neuron and away from the cell body ...
The Nervous System
... •If stimulus is strong enough (threshold reached; threshold = minimum stimulus needed for response) and enough Na+ ions enter cell, the graded potential activates the neuron to begin a long-distance signal called an action potential (or nerve impulse) ...
... •If stimulus is strong enough (threshold reached; threshold = minimum stimulus needed for response) and enough Na+ ions enter cell, the graded potential activates the neuron to begin a long-distance signal called an action potential (or nerve impulse) ...
Answers to What Did You Learn questions
... matter. (4) Oligodendrocytes myelinate the axons in the CNS. (5) Satellite cells, located in the PNS, function to separate peripheral nervous system neuron cell bodies from their surrounding interstitial fluid and control / regulate the continuous exchange of nutrients and waste products between per ...
... matter. (4) Oligodendrocytes myelinate the axons in the CNS. (5) Satellite cells, located in the PNS, function to separate peripheral nervous system neuron cell bodies from their surrounding interstitial fluid and control / regulate the continuous exchange of nutrients and waste products between per ...
Nervous System Function
... then K+ gates to open, inside of cell becomes positive and is depolarized. Na+ gates close and K+ gates open, inside becomes repolarized as K+ leaves cell. ...
... then K+ gates to open, inside of cell becomes positive and is depolarized. Na+ gates close and K+ gates open, inside becomes repolarized as K+ leaves cell. ...
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.