bioex_lect10

bioex_lect10 - MIT OpenCourseWare http:/ocw.mit.edu 5.111...

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MIT OpenCourseWare http://ocw.mit.edu 5.111 Principles of Chemical Science Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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Periodic Trends: Atomic Size See lecture 9 for an introduction to periodic trends and lecture 10 for a discussion of atomic size. Example from page 1 of Lecture 10 notes: The significance of atomic size in the selectivity of ion channels in neurons Ion channels are protein “gates” that regulate the movement of ions (such as Na + or K + ) across cell membranes. Ion channels can be found in all cell types, but are particularly prevalent in nerve cells (neurons) and muscle cells. Specifically, ion channels underlie the nerve impulses (electrical signals) in neutrons. Ion channels help establish and control a voltage gradient in neurons by regulating the influx of sodium ions (Na + ) and potassium ions (K + ).
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This note was uploaded on 03/02/2012 for the course CHEM 5111 taught by Professor Vogel during the Fall '08 term at MIT.

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bioex_lect10 - MIT OpenCourseWare http:/ocw.mit.edu 5.111...

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