Question: During the upstroke of an action potential in squid giant axon, the probability ofa sodium channel being open changes. At rest the probability of an open channelis 0.01, while at the peak of an action potential it is 0.2. Consider 0.6 mm2 of cellmembrane.

An airfoil starts moving on the upstroke has the following (rough) streamline pattern. According to Kelvin's theorem, what would you expect the direction of the first vortex shed to be? clockwise counter-clockwise D Question 10 1 pts A reverse von Karman street is …

Question: Which of the following statements about membrane potentials in different types of cardiac cells is TRUE?Group of answer choicesOnce threshold depolarization is reached in both myocardial and pacemaker cells, the rapid upswing of the action potential is caused by the opening of voltage-gated Na+ channelsThe upstroke of the action potential is steeper in SA

Question: Which of the following occur during the "upstroke" of an action potential?Delayed closure of the K channelsNa permeability decreasesNa permeability increasesK permeability increas

Question: Based on this information, predict the membrane’s relative permeability tosodium and potassium atrest, during the upstroke ofthe action potential, and during the down strokeofthe action potential. (Think about when the potential isapproaching E Na+ and whenitis approaching EK+ .) Explain your prediction.

Question: For Exercises 16–26, assume that the upstroke of a uniformly propagating action potential is described by the Vm template equation (13.3): (x – xo V.m(s, t) = 50 tanh [2– 147,00)] x (13.3) In (13.3) Vm is in mV, t is time in msec, and x is distance along the axis in mm. Distance xo is a constant, in mm, and 0 is the velocity of propagation, in mm/ msec

The rapid depolarizing upstroke phase of an action potential is due to:opening of voltage-gated K channels.closing of voltage-gated K channels.the rapid transport of Na and K by the Na-K primary active pump.opening of voltage-gated Na channels.

Question: Observe the sodium and potassium ions passing across the membrane during the simulation. You might want to slow down the simulation speed and use the zoom feature to get a closer view. 12. Which gated channel opens first (during the upstroke)? 13. Which opens second (during the peak/downstroke)? 14.

Question: Problem 1: During the upstroke of an action potential in squid giant axon, the probability of a sodium channel being open changes. At rest the probability of an open channel is 0.01 , while at the peak of an action potential it is 0.2.

In researching the forces that act on flying birds, scientists studied the motion of cockatiels' bodies as they fly in horizontal flight. As the birds beat their wings, their bodies move up and down. (Figure 1) shows the vertical acceleration of a cockatiel's body during one wing beat, consisting of an upstroke followed by a downstroke.