Answer: ensure blood flows toward your heart
Explanation:
These valves are what ensure blood flows toward your heart. Vein valves work hard, against gravity, to bring the blood that flowed down via arteries back up to your heart. When your vein valves are open and healthy, they are able to do their job properly, as the blood is easily able to flow up.
<span>Suction the tracheostomy tube using sterile technique.</span>
The concentration gradient of K+ would increase. This would give a great driving force for the higher concentration of the K+. Once absorbed in the blood, it would diffuse through the cell's membrane. Since K+ is an ion, it would increase the membrane potential of the cell.
Mercury and Venus.
The order of the planets is
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, (and I guess based on your beliefs) and Pluto.
