BIO172W08Lec37CT - Biology 172 Lecture 37- Synapses and...

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Lecture 37-- Synapses and Muscles: Animals April 14, 2008 Today’s Outline 1. Synapse - Neurotransmitters - Postsynaptic potentials 2. Muscle contraction - Neuromuscular junction - Muscle fibers - Sliding-filament model Biology 172 Announcements Review for Exam 4: Wed April 16 9- 11AM Nat Sci Aud Prof. Raymond’s office hours: Tues Exam 4: Tues April 22 7-9 PM Check CTools for your room! Lect. 28-37 Disc. March 27-April 11 Reading Assignment for today: Ch. 45 (pp.1038-1044; 1048-1049) Ch.46 (pp. 1068 -1072)
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How do electrical signals pass from one cell to another in plants and animals? Plants use plasmodesmata (membrane and cytoplasmic continuities between cells) Neurons in animals must use an indirect mechanism = chemical transmission by neurotransmitters Synapses = specialized junctions between two nerve cells
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Transfer of information at the synapse: presynaptic events Depolarization of membrane from action potential >> Ca ++ channels open
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This note was uploaded on 12/06/2009 for the course BIO 172 taught by Professor Clark during the Spring '08 term at University of Michigan.

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BIO172W08Lec37CT - Biology 172 Lecture 37- Synapses and...

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