No a solution is not a combination a combination is when you combine something
The cell membrane is said to be selectively permeable is because it allows a select few things to go through while stopping the passage of other stuff.
Exhaled air has more carbon dioxide because the blood contains some carbon dioxide (a waste product) that is transferred to the air in the lungs, which is then exhaled. The result is that the exhaled air contains less oxygen and more carbon dioxide than the inhaled air. The air in the lungs also becomes humidified with water before it is exhaled.
Answer:
True
Explanation:
Serous membranes are found around organs to lubricate them and reduce friction
Solution:
The most appropiate unit of measurement fro most types of cells is CD4 counts are measured in cells per cubic millimetre = cells/mm3. A cubic millimetre (mm3) = mm3 = 1 mm x 1 mm x 1 mm.
This is the required answer.
