A End-plate potential Current B 4 = 0 Extracellular side Time 1 Steady state EPSP = 0 Channels in synaptic membrane GEPSP EEPSP (0 mV) 1=0 O Channels in nonsynaptic membrane E (-90 mV) EPSP Cytoplasmic side Time 2 Dynamic (onset of synaptic action) EPSP=+1 Extracellular side EPSP EEPSP E Cytoplasmic side O The EPSP would get smaller in amplitude the capacitive current would be twice as big O The EPSP would last longer Time 3 Steady state (peak of synaptic action) the leak current would be smaller EPSP = 1=0 Extracellular side EPSP EEPSP E₁ Cytoplasmic side 2 ms 10 mV Time 4 Dynamic (decline of synaptic action) EPSP = 0 Extracellular side EEPSP If the same IEPSP was present in a cell that had twice as much membrane capacitance but was otherwise the same, what would NOT happen? E Cytoplasmic side
A End-plate potential Current B 4 = 0 Extracellular side Time 1 Steady state EPSP = 0 Channels in synaptic membrane GEPSP EEPSP (0 mV) 1=0 O Channels in nonsynaptic membrane E (-90 mV) EPSP Cytoplasmic side Time 2 Dynamic (onset of synaptic action) EPSP=+1 Extracellular side EPSP EEPSP E Cytoplasmic side O The EPSP would get smaller in amplitude the capacitive current would be twice as big O The EPSP would last longer Time 3 Steady state (peak of synaptic action) the leak current would be smaller EPSP = 1=0 Extracellular side EPSP EEPSP E₁ Cytoplasmic side 2 ms 10 mV Time 4 Dynamic (decline of synaptic action) EPSP = 0 Extracellular side EEPSP If the same IEPSP was present in a cell that had twice as much membrane capacitance but was otherwise the same, what would NOT happen? E Cytoplasmic side
Anatomy & Physiology
1st Edition
ISBN:9781938168130
Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Chapter12: The Nervous System And Nervous Tissue
Section: Chapter Questions
Problem 7ILQ: Watch this video (http://openstaxcollege.org/l/summation) to learn about summation. The process of...
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