„Experiment an der Nervenzelle. Mit einer Anordnung wie in Abb. 1 wird das Membranpotenzial gemessen. Anschließend erhöht man kontinuierlich die Natriumkonzentration in der umgebenden Flüssigkeit.
Skizzieren Sie ein Spannung-Zeit-Diagramm. Stellen Sie Hypothesen auf, wie sich die Erhöhung der Natriumkonzentration auf das Ruhepotenzial auswirken könnte.“
Versteht das jemand von euch?
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Loading...For me, the step from a stone to a living being is unimaginable. Never in my life have I seen life emerge from non-life. How is that supposed to work, and has it ever been observed?
Glauben die etwa das Ei kommt aus dem Dickdarm?
Warm-blooded animals use their own energy to produce or release heat But I am confused by the insulating properties of the body covering (fur). What role does fur play in heat release and heat production? What advantages or disadvantages can the fur have in warm or cold areas?
https://de.m.wikipedia.org/wiki/Sibirischer_Tiger
Hello, can someone please explain this question to me? I don't understand what my task is now… it's about the animal cell 🙂 Thank you in advance!!
Hello, So I have been trying to solve the following problem for a long time: The word search puzzle (see image above) contains the names of 10 dyes and their respective occurrences. Find the 20 hidden words (read horizontally and vertically, forwards and backwards). Match the dyes to their occurrence. And I did find something:…
The membrane potential is an electrical voltage, i.e. represents the distribution of electrical charges on both sides of the cell membrane, i.e. inside and outside the cell. If there are equal numbers of positive or negative charges on both sides, the membrane potential is 0V. If more negative charges are present within the cell than outside, one measures a negative potential, more positive charges are present in the cell, it is correspondingly positive.
Sodium ions are positively charged. So how does it influence the measured membrane potential if more and more sodium ions are added outside the cell?
Well, you should actually do the experiment and measure the tension after different sodium addition.