Nervous System PNS Notes
... fatty myelin sheaths around the axons of the brain and spinal cord are damaged, leading to demyelinization and scarring. The body’s immune system attacks and damages the myelin. Axons can ...
... fatty myelin sheaths around the axons of the brain and spinal cord are damaged, leading to demyelinization and scarring. The body’s immune system attacks and damages the myelin. Axons can ...
Chapter 12- Intro to NS
... Two types of cells form: neurons and glial cells (supporting cells) A. The Neuron- these types of cells are excitable and can send an impulse (electrical signal). Neurons have three major parts: cell body, dendrites, axon. These cells live for many years, do not under mitosis, and are highly dependa ...
... Two types of cells form: neurons and glial cells (supporting cells) A. The Neuron- these types of cells are excitable and can send an impulse (electrical signal). Neurons have three major parts: cell body, dendrites, axon. These cells live for many years, do not under mitosis, and are highly dependa ...
01Integrated Normal Cells of CNS
... TYPES OF NEURONS Based on number of processes 2. Bipolar Neuron (spindle-shaped neuron): Has two processes (one arising from each pole of the cell body). One of them is the dendrite and the other is the axon, e.g. retina & ...
... TYPES OF NEURONS Based on number of processes 2. Bipolar Neuron (spindle-shaped neuron): Has two processes (one arising from each pole of the cell body). One of them is the dendrite and the other is the axon, e.g. retina & ...
1. Cell body
... • Works by active transport • Net result = more K+ inside the cell and more Na+ outside the cell ...
... • Works by active transport • Net result = more K+ inside the cell and more Na+ outside the cell ...
2.2 Electrical Communication Study Guide by Hisrich
... The main person that treats neurological disorders is a Neurologist (one who studies nerves). That’s a special kind of doctor that specializes in the nervous system. People with these disorders also rely on Pharmacists to dispense their medication, Nurses to care for them, Pharmacologists to produce ...
... The main person that treats neurological disorders is a Neurologist (one who studies nerves). That’s a special kind of doctor that specializes in the nervous system. People with these disorders also rely on Pharmacists to dispense their medication, Nurses to care for them, Pharmacologists to produce ...
Nerve_impulses
... If a second depolarising stimulus arrives during this period, it will be unable to trigger an action potential, as the Na+ gates have not had time to recover after the preceding action potential. ...
... If a second depolarising stimulus arrives during this period, it will be unable to trigger an action potential, as the Na+ gates have not had time to recover after the preceding action potential. ...
PowerPoint to accompany Hole’s Human Anatomy and
... Dendrites Cell body Nucleus Nucleolus Neurofibrils ...
... Dendrites Cell body Nucleus Nucleolus Neurofibrils ...
Course Introduction: The Brain, chemistry, neural signaling
... Passive conduction will ensure that adjacent membrane depolarizes, so the action potential “travels” down the axon. But transmission by continuous action potentials is relatively slow and energy-consuming (Na+/K+ pump). A faster, more efficient mechanism has evolved: saltatory conduction. Myelinatio ...
... Passive conduction will ensure that adjacent membrane depolarizes, so the action potential “travels” down the axon. But transmission by continuous action potentials is relatively slow and energy-consuming (Na+/K+ pump). A faster, more efficient mechanism has evolved: saltatory conduction. Myelinatio ...
Slides - gserianne.com
... • absolute - time when threshold stimulus does not start another action potential (Na+ channels inactivated) • relative – time when stronger threshold stimulus can start another action potential (Na+ channels restored, K+ channels begin ...
... • absolute - time when threshold stimulus does not start another action potential (Na+ channels inactivated) • relative – time when stronger threshold stimulus can start another action potential (Na+ channels restored, K+ channels begin ...
Photo Album
... The neuron consists of a soma, or cell body, in which the nucleus, multiple cytoplasm-filled processes termed dendrites, and the (usually single) axon are placed. The neuron is highly extended in space; one with a cell body of the size shown here might maintain an axon several miles in length! The u ...
... The neuron consists of a soma, or cell body, in which the nucleus, multiple cytoplasm-filled processes termed dendrites, and the (usually single) axon are placed. The neuron is highly extended in space; one with a cell body of the size shown here might maintain an axon several miles in length! The u ...
Chapter 10: Nervous System I
... 1. The refractory period is the period in which a threshold stimulus will not trigger another impulse on an axon. 2. An absolute refractory period is the period when an axon’s membrane cannot be stimulated and is the first part of the refractory period. 3. A relative refractory period is the period ...
... 1. The refractory period is the period in which a threshold stimulus will not trigger another impulse on an axon. 2. An absolute refractory period is the period when an axon’s membrane cannot be stimulated and is the first part of the refractory period. 3. A relative refractory period is the period ...
4-Nervous system I: Structure and organization
... West, L. J., C. M. Pierce and W. D. Thomas. 1962. Lysergic acid diethylamide: its effects on a male Asiatic elephant. Science 138:1100-1103. Harwood, P. 1963. Therapeutic dosage in small and large mammals . Science 139: 684-685. ...
... West, L. J., C. M. Pierce and W. D. Thomas. 1962. Lysergic acid diethylamide: its effects on a male Asiatic elephant. Science 138:1100-1103. Harwood, P. 1963. Therapeutic dosage in small and large mammals . Science 139: 684-685. ...
C48 Nervous System
... may be very long, in humans >1 m from spine to foot Myelin sheath – insulating layer of many axons Synaptic terminals – specialized endings of the axons which relay signals to other cells by releasing neurotransmitters (chemical messengers). Synapse – junction between neurons or to a muscle or ...
... may be very long, in humans >1 m from spine to foot Myelin sheath – insulating layer of many axons Synaptic terminals – specialized endings of the axons which relay signals to other cells by releasing neurotransmitters (chemical messengers). Synapse – junction between neurons or to a muscle or ...
nervous system
... • COVER BRAIN AND SPINAL CORD • CALLED MENINGES • 3 LAYERS • DURA MATER – THICK OUTER LAYER • ARACHNOID MEMBRANE – MIDDLE LAYER • PIA MATER – INNERMOST LAYER • SUBARACHNOID SPACE – CONTAINS CSF ...
... • COVER BRAIN AND SPINAL CORD • CALLED MENINGES • 3 LAYERS • DURA MATER – THICK OUTER LAYER • ARACHNOID MEMBRANE – MIDDLE LAYER • PIA MATER – INNERMOST LAYER • SUBARACHNOID SPACE – CONTAINS CSF ...
here - TurkoTek
... --Within cell membrane, there are Ion Channels, which allow leaks, which have 2 states! ~relatively Closed- don’t let ions flow very freely; which is most of the time ~Open- let ions flow freely These channels are called Voltage-Gated Channels -- the voltage that makes them open is approx. –50 mV or ...
... --Within cell membrane, there are Ion Channels, which allow leaks, which have 2 states! ~relatively Closed- don’t let ions flow very freely; which is most of the time ~Open- let ions flow freely These channels are called Voltage-Gated Channels -- the voltage that makes them open is approx. –50 mV or ...
BIOS 1300 SI EXAM 4 REVIEW –WORKSHEET 2 SI Leader: Merrin
... a. the slower an action potential will be conducted b. the greater the number of action potentials c. the faster an action potential will be conducted d. the less effect it will have on action potential conduction 11. Sensory neurons that provide information about the external environment through t ...
... a. the slower an action potential will be conducted b. the greater the number of action potentials c. the faster an action potential will be conducted d. the less effect it will have on action potential conduction 11. Sensory neurons that provide information about the external environment through t ...
Nervous Systems
... • Myelin sheath: a fatty layer of cells that “insulates” the axon (not present in most invertebrates) • Synaptic terminal: the branching ends of the axon that release a “neurotransmitter” to send a message • Synapse: the space between the synaptic terminal and the effector cell ...
... • Myelin sheath: a fatty layer of cells that “insulates” the axon (not present in most invertebrates) • Synaptic terminal: the branching ends of the axon that release a “neurotransmitter” to send a message • Synapse: the space between the synaptic terminal and the effector cell ...
Nervous System: Levels of Organization Review and
... this unit. Could you demonstrate each of these objectives? If so, you will be ready for the assessment below. If not, consider reviewing content related to these objectives before attempting the assessment. ...
... this unit. Could you demonstrate each of these objectives? If so, you will be ready for the assessment below. If not, consider reviewing content related to these objectives before attempting the assessment. ...
The Nervous System - School District of New Berlin
... – Schwann cells- insulate the neuron, form the myelin sheath ...
... – Schwann cells- insulate the neuron, form the myelin sheath ...
Action Potential
... How does the action potential have an effect ? propagation- action potential progresses down the cell membrane by segments. one region is stimulated, then the region next to it is, etc. electrical current changes shape of channels in adjacent regions * Na+ channels ...
... How does the action potential have an effect ? propagation- action potential progresses down the cell membrane by segments. one region is stimulated, then the region next to it is, etc. electrical current changes shape of channels in adjacent regions * Na+ channels ...
NS to Quiz 1 notes
... (a) Anterior, lateral & posterior funiculi (myelinated fibers) (b) Major pathways called tracts 3. Functions of cord—two functions: conduct impulses to and from brain & is the center for spinal reflexes a. Ascending tracts—sensory info to brain (all axons) b. Descending tracts—motor impulses out of ...
... (a) Anterior, lateral & posterior funiculi (myelinated fibers) (b) Major pathways called tracts 3. Functions of cord—two functions: conduct impulses to and from brain & is the center for spinal reflexes a. Ascending tracts—sensory info to brain (all axons) b. Descending tracts—motor impulses out of ...
04-21-06
... salt solution. One end of the tube tapers to an extremely fine tip (diameter < 1 µm). While looking through a microscope, the experimenter uses a micropositioner to insert the tip of the microelectrode into a cell. A voltage recorder (usually an oscilloscope or a computer-based system) measures the ...
... salt solution. One end of the tube tapers to an extremely fine tip (diameter < 1 µm). While looking through a microscope, the experimenter uses a micropositioner to insert the tip of the microelectrode into a cell. A voltage recorder (usually an oscilloscope or a computer-based system) measures the ...
Nervous System - Downey Unified School District
... • SENSORY NEURONS- CONDUCT NERVE IMPULSES FROM RECEPTORS IN PERIPHERAL BODY PARTS INTO THE BRAIN AND SPINAL CORD • THEIR SPECIALIZED TO DETECT CHANGES IN THE OUTSIDE WORLD OR WITHIN YOUR BODY • MOST OF THE SENSORY NEURONS ARE FOUND TO BE UNIPOLAR, BUT SOME ARE BIPOLAR ...
... • SENSORY NEURONS- CONDUCT NERVE IMPULSES FROM RECEPTORS IN PERIPHERAL BODY PARTS INTO THE BRAIN AND SPINAL CORD • THEIR SPECIALIZED TO DETECT CHANGES IN THE OUTSIDE WORLD OR WITHIN YOUR BODY • MOST OF THE SENSORY NEURONS ARE FOUND TO BE UNIPOLAR, BUT SOME ARE BIPOLAR ...
For electrical signaling
... An action potential: a roughly 100 mV fluctuation in the electrical potential across the cell membrane that lasts for about 1ms Depolarization and hyperpolarization Absolute refractory period: a few milliseconds just after an action potential Relative refractory period: lasting up to tens of mill ...
... An action potential: a roughly 100 mV fluctuation in the electrical potential across the cell membrane that lasts for about 1ms Depolarization and hyperpolarization Absolute refractory period: a few milliseconds just after an action potential Relative refractory period: lasting up to tens of mill ...
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.