'Action potentials' diaporamas de présentation

human physiology part 4

vander lecture

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Neural Conduction

Neural Conduction. Ch. 4. Outline. Measuring the Membrane Potential The Ionic Basis of Resting Membrane Potential Four Factors Determine the Ionic Distribution that Underlies the Resting Membrane Potential Postsynaptic Potentials Generation of Action Potentials

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PRINCIPLES OF PAIN MANAGEMENT & ANALGESIA

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Chapter 39 Neural Signaling and Chapter 40 Neural Regulation

Chapter 39 Neural Signaling and Chapter 40 Neural Regulation. The Nervous System. Parts of a Neuron. Receive stimuli Produce and transmit electrical signals ( aka nerve impulses/action potentials) Synthesize and release neurotransmitters Draw neuron Many axons make nerve

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Muscles &Muscle Tissue

Muscles &Muscle Tissue. Chapter 9. Function of Muscles. Movement Posture Stabilization of Joints Thermogenesis (heat production). Functional Characteristics of Muscle. Excitability (irritability) Can receive and respond to stimuli.

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Introduction to Membrane Channels and Pumps

Introduction to Membrane Channels and Pumps. Ach receptor channel Patch-clamp techniques Ligand-gated and voltage gated channels Action potentials Neurotoxins Molecular structure of sodium channel Gap junctions Common features of membrane channels Active transport

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Cardiac Physiology

Cardiac Physiology. Dr. Meg- angela Christi Amores. The Heart. separate pumps: a right heart that pumps blood through the lungs, a left heart that pumps blood through the peripheral organs atrium and ventricle. The Heart. Cardiac muscle Striated Myofibrils with actin and myosin

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1:1 (relay)

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How is the Nervous System Organized?

How is the Nervous System Organized?. Chapter 3-Neuroscience: The Brain and Behavior. Class Objectives:. Identify and define the structures of the neuron Identify and discuss the role of neurotransmitters on behavior. The Neuron.

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Spike timing dependent plasticity

Spike timing dependent plasticity. Homeostatic regulation of synaptic plasticity. 10. 10. mV. mV. Brief & large. Protein kinases. 1 sec. Ca 2+. Glutamate. Prolonged & moderate. Protein phosphatases. 100 msec. Current model of LTP and LTD. NMDA receptor. Synaptic protein.

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Neuropsychology

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The Auditory System

The Auditory System. Dr. Kline FSU. What is the physical stimulus for audition?. Sound- vibrations of the molecules in a medium like air. The hearing spectrum for humans is approximately between 20 to 20,000 Hz. 3 basic physical properties of sound. 1. Amplitude: intensity of sound

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The Nerve Impulse.

The Nerve Impulse. The Neuron at Rest. The plasma membrane of neurons contains many active Na-K-ATPase pumps. These pumps shuttle Na+ out of the neuron and K+ into the neuron when ATP is hydrolyzed. Three Na+ are pumped out of the neuron at a time and two K+ ions are pumped in.

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What happens during an action potential?

What happens during an action potential?. 5.1.3 Neuronal Communication. Myelinated Neurones. How does the axon change?. Local Currents.

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The Action Potential

The Action Potential. The Resting Potential of the Neuron results from difference in ion distribution inside and outside of cell (-70mV). Forces Behind Resting Potential Selective Permeability - some molecules pass through membrane more freely than others; ion channels

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Table of Contents

Chapter 49. Table of Contents. Section 1 Neurons and Nerve Impulses. Section 1 Neurons and Nerve Impulses. Chapter 49. What is a neuron?. The scientific name for a nerve cell is made up of a cell body, dendrites, and axons.

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Classes of Neurotransmitters

Classes of Neurotransmitters. Acetylcholine Amino Acids aspartate glutamate GABA ( ?-aminobutyric acid: from glutamate) glycine. Classes of Neurotransmitters. Amines: derived from amino acids monoamines catecholamines (tyrosine derivatives) norepinephrine epinephrine dopamine

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Biomedical Instrumentation

Biomedical Instrumentation. Prof. Dr. Nizamettin AYDIN naydin @ yildiz .edu.tr naydin @ ieee.org http:// www.yildiz .edu.tr/~naydin. Course Details. Course Code : GBE 302 Course Name: Biomedical Instrumentation Instructor : Nizamettin AYDIN . Assesment. Method Quantity (%)

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Intra- neuronal Transmission (Electrical)

0. Intra- neuronal Transmission (Electrical). What do you really need to know here?. The RMP is -70 mV, meaning that the cell is more negative inside than outside, And... That means that it is polarized, or ready and waiting to produce a neural signal.

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