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Lecture 8

KINESIOL 1A03 Lecture Notes - Lecture 8: Tandem Pore Domain Potassium Channel, Resting Potential, Action Potential


Department
Kinesiology
Course Code
KINESIOL 1A03
Professor
Krista Howarth
Lecture
8

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Membrane Potential -1
Chapter 11
Functional Organization
of Nervous Tissue

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Membrane Potential -2
Membrane Potential
Na+
Open Na+
channel
Closed Na+
channel
Acetylcholine bound
to receptor sites
Na+ diffuse through
the open channel
Receptor site
for acetylcholine
Acetylcholine

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Membrane Potential -3
Electrical Signals
Cells produce electrical signals called action
potentials
Transfer of information from one part of body to
another
Electrical properties result from ionic
concentration differences across plasma
membrane and permeability of membrane
Like charges repel and unlike attract
anion = negative, cation = positive
separated : move back together; creates
electrical force
separation of charge = potential difference
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