Molecules tend to move across the plasma membrane
A) both up and down their concentration gradients equally
B) in unpredictable directions
C) up their concentration gradients
D) down their concentration gradients
Answer: D
Molecules tend to move across the plasma membrane
A) both up and down their concentration gradients equally
B) in unpredictable directions
C) up their concentration gradients
D) down their concentration gradients
Answer: D