Question

Which of the following represent(s) facilitated diffusion across a membrane? A. carriers, such as ionophores B. permeases, such as GLUT1, a glucose transporter found on erythrocytes C. transport through protein pores D. All of the listed choices represent facilitated diffusion.

Answer 1

D. All of the listed choices represent facilitated diffusion

Step-by-step explanation:

Facilitated diffusion across a membrane is also called passive -mediated transport or facilitated transport. It involves the spontaneous passive movement of ions or molecules past a cell membrane through certain membrane protein. This process is brought about by channel or carrier proteins. It is used by ions that cannot easily cross the phospholipid bilayer

Answer 2

Answer:A

Explanation:it is passive and it does not require directly chemical energy from ATP hydrolysis in the transport step itself, Rather molecules and ions move down their concentration gradient reflecting its diffusive nature.