MCB 32 Lecture 5 - Molecular Cell Biology 32 Dr. Helen Lew...

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Molecular Cell Biology 32 Dr. Helen Lew 9/9/10 Lecture 5 ASUC Lecture Notes Online is the only authorized note-taking service at UC Berkeley. Do not share, copy, or illegally distribute (electronically or otherwise) these notes. Our student-run program depends on your individual subscription for its continued existence. These notes are copyrighted by the University of California and are for your personal use only. D O N O T C O P Y Sharing or copying these notes is illegal and could end note taking for this course. ANNOUNCEMENTS Helen’s office hours are Friday 1–2 p.m. in 2084 VLSB starting next Friday. Intro: Nervous system. 1. Structure and function 2. Terms: language. What it looks like. 3. What it is made of? Membrane voltage = Membrane potential (MP) LECTURE What is the nature of electrical information in the basis of the cellular level? What does the nervous system look like? The nervous system is made of two parts, the central nervous system (CNS) and the peripheral nervous system also known as the PNS. The central nervous system is made of the brain and spinal cord. The peripheral nervous system is everything else outside the brain and spinal cord. It has sensory nerves which bring signals into the CNS from receptors. Receptors are also part of the nervous system. Motor nerves bring signals from the CNS to the effectors, which are muscles and glands. What are they made of? Nerve tissue is made of nerve cells (neurons) and non- nerve cells (glial cells). There is an image of these cells on pg. 2 Fig. 4 of the handout on bSpace. There are three parts of a nerve cell 1. Dendrites 2. Cell bodies = soma, which contains the nucleus where the basic cell functions take place. 3. Axons are very long and can branch many times. At the end of the axons are bouton, which is also known as the synaptic terminal or the axon terminal. This area contains vesicles that contain neuro-vesicles, which send the signal from the nerve terminal to the dendrite of the next neuron. This signal is passed by neurotransmitters which lay in the vesicles in the axon terminal. More area means that more information dendrites can receive. Dendrites sense signals from the previous nerve and they connect to the cell body, which connects to the Axon hillock where action potential (nerve impulses) starts. Action potential (AP) starts here and moves down the axon. These actions potentials are graded potential (GPs). Action potential
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This note was uploaded on 09/29/2010 for the course MCB 57703 taught by Professor Machen during the Fall '08 term at University of California, Berkeley.

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MCB 32 Lecture 5 - Molecular Cell Biology 32 Dr. Helen Lew...

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