The photograph shows a type of blood cell.
Which statements about these cells are correct?
1) Oxygen diffuses through the phospholipid bilayer.
2) Sodium ions diffuse through the phospholipid bilayer.
3) Water passes in and out of these cells by osmosis.
1 )
1, 2 and 3
2 )
1 and 2 only
1 and 3 only
4 )
2 and 3 only
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