Amolecule that moves across a cell membrane without
using the cell's energy tends to move
oa) away from the area of equilibrium.
ob) away from the area where it is less concentrated.
oc) away from the area where it is more concentrated.
od) toward the area where it is more concentrated.

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.