Which of the following does not freely diffuse through the plasma membrane? (What cannot pass through without some help??)
Choose one answer.
a. potassium ions, K+
b. water, H2O
c. carbon dioxide, CO2
d. oxygen, O2

Question

Which of the following does not freely diffuse through the plasma membrane? (What cannot pass through without some help??)
Choose one answer.
	a. potassium ions, K+ 	
	b. water, H2O 	
	c. carbon dioxide, CO2 	
	d. oxygen, O2

anonymous · Answer

potassium ions, k+ i think.they use pomps.like the one in forming an action potential in nervous system.

anonymous · Answer

Oh'Kay.
Which of the following is a quality of active transport?
Choose one answer.
	a. It is how water moves across a membrane. 	
	b. It is accomplished by random motion of particles. 	
	c. It usually ends in dynamic equilibrium. 	
	d. It requires energy to transport molecules across the membrane.

anonymous · Answer

@diysohail

anonymous · Answer

d i guess,uses ATP to transfer.