When potassium ions (K+) cross a membrane through an ion channel, they acquire a velocity on the order of 10-2 m/s. Approximately what are the minimum and maximum values of the magnetic force on a K+ due to Earth’s magnetic field?
When potassium ions (K+) cross a membrane through an ion channel, they acquire a velocity on the ...
the manner in which potassium ions are transported across the membrane by the potassium channel. a. Provide an explanation as to why potassium cannot cross the plasma membrane without the aid of a potassium channel. b. Provide an protein structure based explanation as to how the potassium channel is able to transport potassium ions through the membrane at a high rate while at the same time preventing the transport of sodium ions which have a smaller ionic radium than potassium...
A
certain single ion channel is selectively permeable to K+ and has a
resistance of 1.5 GI, 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 time?
A certain single ion channel is selectively permeable to K+ and has a resistance of 1.15 G, therefore a...
Let’s consider an electrical current through a single ion channel, as shown in the following figure. We start by treating an ion channel as a cylindrical pore through the cell membrane. The channel is of length L ≈ 5 nm and is filled with water. The concentration difference of Na+ ions across the channel is Δc ≈ 100 mM. This concentration difference produces a flux of ions through the channel given by DΔc/L, where D is the diffusion constant for...
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
Under certain circumstances, potassium ions (K") in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is -80.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: 1.36 x10 Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions...
Under certain circumstances, potassium ions (K+) in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is-80.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions move from the...
Under certain circumstances, potassium ions (K) in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is -70.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions move from...
Under certain circumstances, potassium ions in a cell will move
across the cell membrane from the inside to the outside. The
potential inside the cell is -75.5mV and the potential outside he
cell is zero. What is the change in the electrical potential energy
of a single potassium ion as it moves across the membrane ?
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What is force acting on a singly charged potassium ion with zero velocity in a 1Tesla magnetic field?
In its resting state, the membrane surrounding a neuron is
permeable to potassium ions but only slightly permeable to sodium
ions. Thus, positive K ions can flow through the membrane in an
attempt to equalize K concentration, but Na ions cannot as quickly.
This leads to an excess of Na ions outside of the cell. If the
space outside the cell is defined as zero electric potential, then
the electric potential of the interior of the cell is negative.
This...