What is the main function of a selectively permeable cell membrane?

What is the function of a selectively permeable membrane?Selectively permeable means that only certain substances are able pass through the cell membrane. A selectively permeable membrane is a membrane that only can be per…meated by selective things, in other words a surface that lets some molecules in but not others.

If these are the missing choices: a. to determine skin temperature, place the back of your hand against the patient's skin.b. determine body temperature by touching the patient's hands and feet.c. skin temperature will tell you very little about this patient's condition or well-being.d. the patient's skin temperature and color will likely be warm and red.my answer is: a. to determine skin temperature, place the back of your hand against the patient's skin. using the back of the hand to check for temperature rather than the palm is more effective because the back of the hand has more nerves that can feel and transmit the temperature than the palm.