Answered: Detailed understanding of what the…

Detailed understanding of what the action potential of a neuron. What is the opening and closing of multiple channels required?

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter32: The Reception And Transmission Of Extracellular Information

Section: Chapter Questions

Problem 15P

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Steps that occur in a neuron Defore, during, and affer action Potential
Nerve transmission and communication with other neurons. DI it restores the membrane potential the chemical that talks between one neuron and the other neuron the point between the neuron and the muscle transmits impulse to dendrite it carries receptors on its surface it produces the neurotransmitter 1. Neurotransmitter 2. Presynaptic membrane 3. Postsynaptic membrane 4. Nat-K+ pump 5. Neuromuscular junction 6. Axon
How one action potential triggers another; how the continuous conduction seen in unmyelinated nerve fibers result from a chain reaction of action potentials; and what normally prevents the signal from traveling backward to the neurosoma.
Electrophysiology of the Neuron Phase State of lon Channels Movement of lons Voltage Across Membrane RMP Resting Membrane Potential Hyperpolarizing Graded Potential IPSP Depolarizing Graded Potential EPSP Depolarization Phase of Action Potential Peak of Action Potential Repolarization Phase of Action Potential Hyperpolarization Phase of Action Potential Return to RMP All voltage gated channels - CLOSED All chemically gated channels -CLOSED Voltage gated Na* CLOSED Voltage gated Na' OPEN Na+ and K+ leak channels - OPEN Na+ K+ pump working K+ Voltage gates close slowly Voltage gated K* CLOSED Voltage gated K* OPEN Cl- chemically gated channels- OPEN Na+ chemically gated channels-OPEN K+ chemically gated channels -OPEN 2 K+ pumped IN 3 Na+ pumped OUT K+ diffuses OUT Na* diffuses IN K+ diffuses out or Ch -70 mV to -56 mV -55mV to +30 mv -70 mV +30mv More negative than -70 mV +30mV to -70 mV
Activities Based on the anatomical characteristics of the neuron illustrated in Figure 10.1, what is the structural classification of this neuron? Structural classification Functional clasification or Identify the structural classification for the following images of neurons. Identify the functional classification of the neurons in the following figures. OR Label the neuron figure below with the following structures: dendrites, cell body, axon hillock, myelin, nodes of Ranvier, axon terminals. What is the structural and functional classification for this neuron? Functional: Structural: 330 Nervous System | Unit 10
Connexons of gap junctions in electric synapses :-a- are Ligand-gatedb- are voltage-gatedc- allow transmission of potential changes in both directions between the pre- and post- synaptic neuronsd- close whenever the presynaptic neuron becomes hyperpolarized
Neuromuscular junction, also called myoneural junction, site of chemical communication between a nerve fibre and a muscle cell. The neuromuscular junction is analogous to the synapse between two neurons. A nerve fibre divides into many terminal branches; each terminal ends on a region of muscle fibre called the end plate. Synaptic Cleft is the space between the presynaptic terminal and postsynaptic cell. It is roughly the size of 30 nm. The synaptic cleft allows the neurotransmitters to diffuse and reach the other side of the synapse or the neuromuscular junction. It also contains enzymes for the degradation of the excess or extra neurotransmitters. Embedded in the end plate are thousands of receptors, which are long protein molecules that form channels through the membrane. Upon stimulation by a nerve impulse, the terminal releases the chemical neurotransmitter acetylcholine from synaptic vesicles. Acetylcholine then binds to the receptors, the channels open, and sodium ions flow into…
Depolarisation & repolarisation in metaneuron - put the following events in order (from 1 to 4). Membrane potential crosses the threshold potential and an action potential is achieved. Depolarisation occurs when the applied current is sufficient to move membrane potential towards neutral. The neuron’s membrane potential drops below the initial resting membrane potential and temporarily becomes refractory to further action potentials. Membrane quickly repolarises by opening of K+ channels, allowing K+ions to leave the cell and charge separation to be re-established.
Which of the following are TRUE, when describing the Action Potential of a Non- Contractile Cardiac Pacemaker cell? Select ALL that are true. O Resting membrane potential is more polarized than in neurons, because of more Leakage channels for K+. Progressive Na+ channel (the "funny current", iNa) opening, activates a Transient Voltage Sensitive (T-type) Ca++ channel. Together these channels depolarize the membrane and activate Voltage-Sensitive Long-acting (L-Type) Ca++ channel. The resulting depolarization, closes the "funny" current and T-type Ca++ channels. O Action Potential depolarization, resulting from the Voltage-Activated Na+ channel, triggers Voltage-Sensitive Long-acting (L-Type) Ca++ channel. OMembrane depolarization triggers Voltage-Activated K+ channels (Delayed Rectifier) to open. Increasing K+ permeability and repolarizing the membrane. When the membrane polarizes to -60 mv, the Delayed Rectifier closes and a progressive Na+ channel (the "funny current", iNa) opens. The…
The particular glial cells that engulf cellular debris and trigger inflammation aremicroglia.Schwann cells.astrocytes.oligodendrocytes.oligodendroglia.
Which statement(s) regarding ions is true when a neuron is at rest? Positively charged cations are attracted to the intracellular fluid Positively charged anions are attracted to the intracellular fluid Negatively charged anions are drawn to the intracellular fluid Negatively charged anions are balanced across the cell membrane
Graph of membrane potential versus time The graph above represent time in milliseconds. At what time (in milliseconds) is the inside of the neuron the most positive and why? Explain why the membrane potential changes at X. Explain what is happening at point C to the sodium and potassium ions and how this is affecting the membrane potential. Describe two things that contribute to the resting membrane potential.