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BIO172W08Lec37CT - Biology 172 L e c t u r e 3 7 S y n a p...

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1 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) 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 Transfer of information at the synapse: presynaptic events • Depolarization of membrane from action potential >> Ca
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BIO172W08Lec37CT - Biology 172 L e c t u r e 3 7 S y n a p...

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