1. Membrane potential is functionally important because (ONLY ANSWER!!) A. it is
ID: 3513037 • Letter: 1
Question
1. Membrane potential is functionally important because (ONLY ANSWER!!)
A. it is a form of stored energy that can be used to do work
B. it keeps ion levels within normal ranges
C. cells wouldn't be able to carry out membrane transport without it
D. it is the only way that cells can transmit information to other cells
2. The overall purpose of cellular signaling is to ____________________. (ONLY ANSWER!!)
A.change membrane potential
B. stimulate protein synthesis
C. modify the activity of the receiving cell
D. turn off a process
E. restore homeostasis
Explanation / Answer
1. Maintenance of the resting potential can be metabolically costly for a cell because of its requirement for active pumping of ions levels with in normal range due to leakage channels. The cost is highest when the cell function requires an especially depolarized value of membrane voltage.
2. The overall purpose of celluler signaling is to restore homeostasis.
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