3 Look over the diagrams that describe the creation of a mem

3, Look over the diagrams that describe the creation of a membrane potential in an artificial cell (Fig. 5.23 in the 7\" Ed, Fig 5-24 in the 6th Ed of your textbook). Then decide which of the following is true: A. At the equilibrium potential for K., the concentrations for K. are equal in the icF and ECF B. At the equilibrium potential, the concentration and electrical gradients for all ions point in the same direction c. If a cl leak channel were the only channel open in the cell membrane, the membrane potential for the cell would be negative D. The membrane potential is the charge outside a cell, which exactly opposes the concentration gradient for a given ion. 4. For the alien cell shown below, predict the sign of the equilibrium potential for ion B-. A. Positive B. Negative C. Cannot tell, too little information s. Foran artificial cel, which of the following is TRUE when an ion channel for hypothetical lonx-opens? (Assume Ex- m -68mV and RMP -65mV) A. x- will move into the cell and cause hyperpolarization B, X- will move out of the cell and cause depolarization c. x, will move into the cell and cause depolarization -s a e D. X- will move out of the cell and cause hyperpolarization Ex- will move until it is equally distriubuted

Solution

YOU ARE ANSWERS ARE CORRECT

4 For the alien cell shown below, predict the sign of the equilibrium potential for ion B

a. positive

b.negative—answer

c, cannot tell

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3 .Look over the diagrams that described the creation of a membrane potential in an artificial cell

Answer: OPTION D

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QUESTION 5

Answer : OPTION A

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