What is the function of each of the four membrane proteins shown in figure 26.6? When is
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What is the function of each of the four membrane proteins shown in figure 26.6? When is each membrane protein channel open?
Figure 26.6
Transcribed Image Text:
Trigger zone Axon Sodium (Na") + Potasslum (K) Direction of neural impulse Nogativaly charged protein 1 Resting potentlal K+ leakage channel (always оpen) Delayed K+ channel (closed) Outside axon 50 -70 mV Nat channel (closed) Nat/K+ pump (always active) + 435 + + + + ++ Threshold -50 АТР -70 2 Inside axon Time in milliseconds 2 Depolarization 50 -50 mv Nat channel (open) 50 35 Threshold -50 ATP -70 2 3 Time In milliseconds 3 Repolarization 50 +35 mv Nat channel (closed) Delayed K+ channel (open) 50 -70 435 Threshold -50 ATP -70 2 3 Time in milliseconds 4 Return to resting potential 50 -70 mV Delayed K+ channel (closed) Nat channel 50 +35 -70 (closed) Threshold -50 ATP -70 1 2 3 Time In milliseconds Membrane pote ntial (mV) Membrane potential (mV) Membrane potential (mV) Membrane potential (mV)
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Channel protein They move ion from high concentration to low concentration without the need of ATP T...View the full answer
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