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I wish to share an open-source modelling study on Ca2+ oscillations in astrocytes which contains a detailed description of the underlying math and even better, it has supplementary Matlab code published alongside (Zeng et al., 2009). This may be of help to check your formulae and script. Unfortunately I do not feel inclined to start troubleshooting and ...


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Note that estimations in this answer are very very crude. I can speak with confidence that the mean pressure of ankel joint is greater than the heel and the metatarsus. However I do not trust that it can pin down the point with most pressure. @Ilan gave a very good synopsis on foot pressure distribution. However, pressure in ankles was not analyzed in his ...


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It is logically clear that the ankle could only partly be analyzed in the group of joints that are below its height. There is no direct way to measure the pressure on ankle joint (on talus bone), but from the logic it is clear that it should be the point of highest pressure in the group of points lister in the question, however the pressure is distributed ...


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I just weighed a pigeon tail feather (~10 cm) long. The mass was 0.05 g. Although all tail feathers are not equal in length (and all pigeons are not equal in size), this is probably a good approximation. Measuring the drag coefficient is going to be very challenging, because it will vary with the orientation of the oncoming airflow. A feather falling with ...


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Action potentials of single neurons (APs) are the building blocks of compound action potentials (CAPs). While each of the individual APs is a yes-or-no response with a clear-cut defined threshold, CAPs are not. CAPs are build up of hundreds or thousands of neuronal contributions in, e.g., the auditory nerve. Decreased responsiveness as well as ...


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Short answer Negative ions can flow against the electrical gradient into the cell, provided their concentration gradient across the cell membrane is large enough. Background When an ion channel opens, the resultant ion flow is dependent on two things; the membrane potential (which is indeed negative at rest) and the concentration gradient of the ion. ...



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