Bio_1A_Lecture_24_Neuron - Nerve cells and neural...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Nerve cells and neural connectivity Some Comparisons between Endocrine and Neural Communication Endocrine secrete chemical at one site; uses circulation to act at another site Relatively slow (0.1 m/sec) Acts on many cells Can sustain action for long periods of time Neural nerve cell to nerve cell or nerve cell to effector cell (e.g., muscle) Extremely fast; can travel 50-80 m/sec Very distinct effects Connection often acts on one cell An Overview of the Vertebrate Nervous System peripheral nervous system central nervous system 1. How does the nerve cell carry information? 2. How does the information go from nerve to nerve? 3. How does the effector cell respond? Dendrites Cell body Nucleus Axon hillock Axon Signal direction Synapse Myelin sheath Synaptic terminals Presynaptic cell Postsynaptic cell Terminology: NEURONS and NERVES Anatomy of a neuron Myelin sheath Nodes of Ranvier Schwann cell Schwann cell Nucleus of Schwann cell Axon Layers of myelin Node of Ranvier Axon Other supporting cells - - The Glia: astrocytes; oligodendrocytes ; Schwann cells EXCITATION: Getting the cell activated CONDUCTION: Moving the stimulus along TRANSMISSION: Communication between neurons Principal functions of nerves Principal functions of nerves The RESTING MEMBRANE POTENTIAL How does this battery come about? How do we use it for communication? Introduction to Bioelectricity (reference) Dendrites Cell Body Axon Neuron The basis for the membrane potential K + channel Na + channel Na + /K + pump Three major proteins in the plasma membrane protein protein protein [Na...
View Full Document

Page1 / 28

Bio_1A_Lecture_24_Neuron - Nerve cells and neural...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online