Problem 2 (20 points) 12 in soul gradualily increase thts, you membrane poterisi
ID: 202512 • Letter: P
Question
Problem 2 (20 points) 12 in soul gradualily increase thts, you membrane poterisial of a squid neuron under a variety temperature seawaler at (25-C). From these notice the direction of the Y-axis- as you membrane potential is becoming depolarized of conditions In your frst set of experiments, you measure the resting im you measuring the mebrane potertial sa (extracellular solution) at 4 C. Then, you perform the following goohe resing seawater at (25 C). From these experments, you generasi concentn you genrate the following graph Please -80 -70 60 50 -40 -30 ·25 -20- 0 +10 12 5 10 20 50 100 200 External Potassium Concentration (mM) Assume that as you changed external potassium concentration, you altered your solutions appropriately such that charge maintained a) Explain why changing the concentration of extracellular potassium changes the membrande potential balance and osmotic balance are ce CoinExplanation / Answer
ANSWER:
If the extracellular potassium concentration increases, potential gradient decreases gradually which increases resting potential to be more positive. If conc. of K increases it will cause more depolarization by closing Sodium channels & opening up the potassium channels and in inverse causes hyperpolarization.