Lecture 14- Cardiac+Smooth muscle- copy

Lecture 14- Cardiac+Smooth muscle- copy - le f t v en tr ic...

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Unformatted text preview: le f t v en tr ic le r igh t v en tr ic le r igh t a tr ium le f t a tr ium to body from lung from body to lung R ep re sen ta tion a l d iag ram o f th e fou r ch am b e rs o f th e h ea r t O 2 CO 2 le f t a tr ium le f t v en tr ic le r igh t a tr ium r igh t v en tr ic le 1 ) SA nod e d epo la r ize s and g en e ra te s ac tion po ten tia ls th a t sp read th rough r igh t a tr ium . 2 ) A tr ia l ac tion po ten tia ls reach AV nod e . AV nod e d epo la r ize s and g en e ra te s ac tion po ten tia ls 3 ) A c tion po ten tia ls sp read dow n r igh t and le f t f ib e rs th a t run a long v en tr icu la r w a lls . V en tr icu la r f ib e rs b eg in to d epo la r ize th roughou t bo th v en tr ic le s . 4 ) V en tr icu la r f ib e rs d epo la r ize , g en e ra te ac tion po ten tia ls and cau se v en tr ic le s to con trac t . bund le o f H is SA node AV node 100 20 time time 100 20 Na c 100 200 Ca c time K +50 rep depo Card Act A B C 100 20 time Card Act 100 20 tim +50 + Na + Ca ++ K + 100 200 time in msec Na + Na + Ca ++ Ca ++ + + Generation of Cardiac Action Potential Membrane Potential le f t a tr ium le f t v en tr ic le r igh t a tr ium r igh t v en tr ic le 1 ) SA nod e d epo la r ize s and g en e ra te s ac tion po ten tia ls th a t sp read th rough r igh t a tr ium . 2 ) A tr ia l ac tion po ten tia ls reach AV nod e . AV nod e d epo la r ize s and g en e ra te s ac tion po ten tia ls 3 ) A c tion po ten tia ls sp read dow n r igh t and le f t f ib e rs th a t run a long v en tr icu la r w a lls ....
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This note was uploaded on 10/25/2010 for the course BIO 365R taught by Professor Draper during the Spring '08 term at University of Texas at Austin.

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Lecture 14- Cardiac+Smooth muscle- copy - le f t v en tr ic...

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