Answer:
Keeping the alveoli open and for constant gas exchange.
Explanation:
After maximum expiration of the air in the lungs, there remains still some air called the residual volume. This is because the alveoli, the smallest sacs in the lungs which take part in the exchange of gases between the lungs and the bloodstream, need to stay inflated and open. This also ensures that the gas exchange is continuous between breaths which is really important. I hope this answer helps.
Answer:
I believe the ans is topiary.
Answer:
SA node
Explanation:
The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles. The lower heart chambers (ventricles) contract or pump.
The cell membrane helps the organism in its fight to maintain homeostasis. The cell membrane assists in the maintenance of homeostasis by: Maintaining a fluid phospholipid structure. Phospholipids are molecules that have a head region that carries an electric charge attached to a lipid tail portion.
