Please help and show work. I keep getting the wrong answers for these problems
1. Cell membranes contain channels that allow Na + ions to rush in. Consider a channel that has a diameter of 2.91 nm and a length of 13.5 nm. If the channel has a resistance of 18.5 GΩ, what is the resistivity ? of the solution in the channel?
2. What is the resistance of a 54.154.1-m-long aluminum wire that has a diameter of 8.79 mm8.79 mm? The resistivity of aluminum is 2.83×10−8 Ω · m2.83×10−8 Ω · m.
resistance:
3. A certain single ion channel is selectively permeable to K+K+ and has a resistance of 1.15 GΩ1.15 GΩ , therefore a current of potassium ions through the channel is possible. During an experiment, the channel is open for approximately 1.50 ms1.50 ms while the voltage across the channel is maintained at 85.5 mV85.5 mV . How many K+K+ ions travel through the channel during this time?
number of K+K+ ions:
Please help and show work. I keep getting the wrong answers for these problems 1. Cell...
Cell membranes contain channels that allow Na+ ions to rush in. Consider a channel that has a diameter of 2.81 nm and a length of13.0 nm. If the channel has a resistance of 16.5 GΩ, what is the resistivity ? of the solution in the channel?
A certain single ion channel is selectively permeable to K+ and has a resistance of 1.15 GΩ , therefore a current of potassium ions through the channel is possible. During an experiment, the channel is open for approximately 1.50 ms while the voltage across the channel is maintained at 81.5 mV . How many K+ ions travel through the channel during this
A certain single ion channel is selectively permeable to K and has a resistance of 1.15 GΩ. During an experiment, the channel is open for approximately 1.50 ms while the voltage across the channel is maintained at 81.5 mV with a patch clamp. How many K ions travel through the channel during this time?
15. Estimate the resistance ? of a standard (not a high-speed) phone charging cable. ?=_____Ω 19. A certain single ion channel is selectively permeable to K+ and has a resistance of 1.15 GΩ , therefore a current of potassium ions through the channel is possible. During an experiment, the channel is open for approximately 1.50 ms while the voltage across the channel is maintained at 89.5 mV . How many K+ ions travel through the channel during this time? number...
SHOW YOUR WORK, PLEASE WRITE LEDGIBLY AND CLEARLY 1. Patch clamp recording of a single ion channel yields the following results: Holding Potential Measured Current (mV) 100 50 (pA) 1.0 0.0 +50 +100 +2.0 +3.0 A) Draw a graph of the current (on the vertical axis)-voltage relation for this channel. B) What is the electrical resistance (in ohms) of this channel? (keep in mind mVa 103 volts, pA 101 amperes, and an ohm is a derived unit that is equivalent...