10EExpDevLearn
... Myelin is an electrical insulator sheath wrapped around axons Oligodendrocytes produce myelin on CNS axons Schwann cells produce myelin on PNS axons Short gaps in myelin along axons called nodes of Ranvier Myelin’s function is to speed action potential propagation down long axons ...
... Myelin is an electrical insulator sheath wrapped around axons Oligodendrocytes produce myelin on CNS axons Schwann cells produce myelin on PNS axons Short gaps in myelin along axons called nodes of Ranvier Myelin’s function is to speed action potential propagation down long axons ...
Biology 2401 Anatomy and Physiology I notes
... chromatophilic substance (Nissl bodies) - densely staining areas that contain large number of ribosomes (ribosomes produce proteins, many of which are neurotransmitters, the chemicals released at axons synaptic terminals). neurofibrils - filaments of cytoskeleton that extend from cell body through a ...
... chromatophilic substance (Nissl bodies) - densely staining areas that contain large number of ribosomes (ribosomes produce proteins, many of which are neurotransmitters, the chemicals released at axons synaptic terminals). neurofibrils - filaments of cytoskeleton that extend from cell body through a ...
![Module 725 1. [6 marks] a Briefly define an autoreceptor Receptor](http://s1.studyres.com/store/data/017975528_1-7306a525b09cd1f5503c471972cb9071-300x300.png)
Module 725 1. [6 marks] a Briefly define an autoreceptor Receptor
... help in energy supply to neurones-take up glucose at blood vessels, export it as lactate to neurones. Or derived from glycogen 5. Metabotropic receptors in the CNS largely signal through heterotrimeric G proteins. Briefly describe FIVE downstream results which may result from their activation. [10 m ...
... help in energy supply to neurones-take up glucose at blood vessels, export it as lactate to neurones. Or derived from glycogen 5. Metabotropic receptors in the CNS largely signal through heterotrimeric G proteins. Briefly describe FIVE downstream results which may result from their activation. [10 m ...
12-1 Chapter 12 Lecture Outline See PowerPoint Image Slides for
... function of neurotransmitters – flooded exposed hearts of 2 frogs with saline – stimulated vagus nerve --- heart slowed – removed saline from that frog and found it slowed heart of 2nd frog --- “vagus substance” ...
... function of neurotransmitters – flooded exposed hearts of 2 frogs with saline – stimulated vagus nerve --- heart slowed – removed saline from that frog and found it slowed heart of 2nd frog --- “vagus substance” ...
Chapter 12
... function of neurotransmitters – flooded exposed hearts of 2 frogs with saline – stimulated vagus nerve --- heart slowed – removed saline from that frog and found it slowed heart of 2nd frog --- “vagus substance” ...
... function of neurotransmitters – flooded exposed hearts of 2 frogs with saline – stimulated vagus nerve --- heart slowed – removed saline from that frog and found it slowed heart of 2nd frog --- “vagus substance” ...
Chapter 43
... – Support neurons both structurally and functionally – Schwann cells and oligodendrocytes produce myelin sheaths surrounding axons • In the CNS, myelinated axons form white matter – Dendrites/cell bodies form gray matter ...
... – Support neurons both structurally and functionally – Schwann cells and oligodendrocytes produce myelin sheaths surrounding axons • In the CNS, myelinated axons form white matter – Dendrites/cell bodies form gray matter ...
No Slide Title
... function of neurotransmitters – flooded exposed hearts of 2 frogs with saline – stimulated vagus nerve --- heart slowed – removed saline from that frog and found it slowed heart of 2nd frog --- “vagus substance” ...
... function of neurotransmitters – flooded exposed hearts of 2 frogs with saline – stimulated vagus nerve --- heart slowed – removed saline from that frog and found it slowed heart of 2nd frog --- “vagus substance” ...
The Nervous System
... the ripples created by a stone tossed into a pond). • As the Na+ drifts, some of it will leak back out of the membrane. – What this means is that the degree of depolarization caused by the graded potential decreases with distance from the origin. ...
... the ripples created by a stone tossed into a pond). • As the Na+ drifts, some of it will leak back out of the membrane. – What this means is that the degree of depolarization caused by the graded potential decreases with distance from the origin. ...
Nervous Tissue
... C. Synaptic vesicles release neurotransmitter into the synaptic cleft by exocytosis. In this process, the vesicle membrane is incorporated into the presynaptic membrane. Although these vesicles contain neurotransmitter, they do not manufacture it. ...
... C. Synaptic vesicles release neurotransmitter into the synaptic cleft by exocytosis. In this process, the vesicle membrane is incorporated into the presynaptic membrane. Although these vesicles contain neurotransmitter, they do not manufacture it. ...
File
... Thin, cytoplasmic extensions from the cell body Some short, many branches Increases surface area for attachment to endings of other neurons ...
... Thin, cytoplasmic extensions from the cell body Some short, many branches Increases surface area for attachment to endings of other neurons ...
Central Nervous System (CNS)
... of ions controlled by Na+/K+ pump that require ATP • Nerve impulse starts when the membrane of the nerve depolarizes due to some stimulus, chemical, temp. changes, mechanical, etc…. • Depolarization is caused by the influx of Na+ which causes the membrane to become more positive. This starts an acti ...
... of ions controlled by Na+/K+ pump that require ATP • Nerve impulse starts when the membrane of the nerve depolarizes due to some stimulus, chemical, temp. changes, mechanical, etc…. • Depolarization is caused by the influx of Na+ which causes the membrane to become more positive. This starts an acti ...
The Nervous System
... are referred to as afferent because they transmit impulses to the nerve cell. The axon transmits impulses away from the cell body so it is referred to as an efferent process. ...
... are referred to as afferent because they transmit impulses to the nerve cell. The axon transmits impulses away from the cell body so it is referred to as an efferent process. ...
The Nervous System
... depends of voltages created by ionic changes across the plasma membranes There is a difference in ion concentrations between the cell’s contents and the extracellular fluid – this is the membrane potential All cells have this membrane potential Only neurons and muscle cells can change their membrane ...
... depends of voltages created by ionic changes across the plasma membranes There is a difference in ion concentrations between the cell’s contents and the extracellular fluid – this is the membrane potential All cells have this membrane potential Only neurons and muscle cells can change their membrane ...
Slide 1 - AccessPhysiotherapy
... dendrites and also on its cell body, the soma. The soma of this type of cell integrates the electrical information and also provides metabolic support for the cell as a whole. The place where the axon comes out of the soma is called the axon hillock, and this is where the information is encoded into ...
... dendrites and also on its cell body, the soma. The soma of this type of cell integrates the electrical information and also provides metabolic support for the cell as a whole. The place where the axon comes out of the soma is called the axon hillock, and this is where the information is encoded into ...
nerve
... neuron. Myelin is not part of the structure of the neuron but consists of a thick layer mostly made up of lipids, present at regular intervals along the length of the axon. • Such fibers are called myelinated fibers. • The water-soluble ions carrying the current across the membrane cannot permeate t ...
... neuron. Myelin is not part of the structure of the neuron but consists of a thick layer mostly made up of lipids, present at regular intervals along the length of the axon. • Such fibers are called myelinated fibers. • The water-soluble ions carrying the current across the membrane cannot permeate t ...
Nervous System
... When a neuron is stimulated, some Na+ channels open and ions enter. Membrane potential rises (becomes less negative). If threshold potential of -50mV is reached, an action potential is triggered. DEPOLARIZATION occurs when most Na+ channels are open and the ions diffuse rapidly down their concentrat ...
... When a neuron is stimulated, some Na+ channels open and ions enter. Membrane potential rises (becomes less negative). If threshold potential of -50mV is reached, an action potential is triggered. DEPOLARIZATION occurs when most Na+ channels are open and the ions diffuse rapidly down their concentrat ...
Nervous Dia rams
... A. Synapse; B. Axon; C. Myelin sheath; D. Nerve impulse; E. Sense receptor; F. Response; G.Reflex; H. Cell body; L Dendrite; J, Nerve; K. Neurotransmitter; L. Axon terminal Function ...
... A. Synapse; B. Axon; C. Myelin sheath; D. Nerve impulse; E. Sense receptor; F. Response; G.Reflex; H. Cell body; L Dendrite; J, Nerve; K. Neurotransmitter; L. Axon terminal Function ...
315midterm - Rocky Mountain College
...
...
- What is the gap between motor neurons called?
- The resting state of approximately -70 mlv is maintained primarily by what pump?
- List the 4 major Ions (chemicals) involved inside and outside the nerve, indicate + or - for each.
- At what level of mvls is the action potential triggere ...
Central nervous system
... Two types of neural cells in the nervous system: Neurons Process, transfer, and store information Neuroglia – (also called “glial cells”) Support and protect neurons ...
... Two types of neural cells in the nervous system: Neurons Process, transfer, and store information Neuroglia – (also called “glial cells”) Support and protect neurons ...
Recitation 16 - MIT OpenCourseWare
... Na+ channels are induced to open. Once Na+ rushes in, the inside of the cell becomes positive, and this induces the voltage-gated K+ channels to open. Thus K+ rushes out, restoring the membrane potential back to normal (roughly –70mV). Action potentials do not vary by amplitude; the maximal membrane ...
... Na+ channels are induced to open. Once Na+ rushes in, the inside of the cell becomes positive, and this induces the voltage-gated K+ channels to open. Thus K+ rushes out, restoring the membrane potential back to normal (roughly –70mV). Action potentials do not vary by amplitude; the maximal membrane ...
chapter 3 cells of the nervous system
... – Sodium flows into neuron , potassium flows out around the peak of the action potential ...
... – Sodium flows into neuron , potassium flows out around the peak of the action potential ...
File
... has a negative charge. As the figure shows, a Na+ / K+ pump in the cell membrane pumps sodium out of the cell and potassium into it. However, because the cell membrane is a bit leakier to potassium than it is to sodium, more potassium ions leak out of the cell. As a result, the inside of the membran ...
... has a negative charge. As the figure shows, a Na+ / K+ pump in the cell membrane pumps sodium out of the cell and potassium into it. However, because the cell membrane is a bit leakier to potassium than it is to sodium, more potassium ions leak out of the cell. As a result, the inside of the membran ...
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.