Over time, the toxins from inhaled cigarette smoke break the thin walls of alveoli, leaving larger, less efficient air sacs. The sacs also begin to lose their bounce, making it harder to bring in the oxygen and expel carbon dioxide. 3 Both can become partially trapped in the lungs.
Answer:
The correct answer is cells in the damaged parts divide and produce more cell by undergoing mitosis.
Explanation:
Mitosis is a process by which total number of chromosomes of parental cell is distributed equally within the 2 newly formed daughter cells.As a result the each daughter cell has same number of chromosome with respect to that of parental cell.
Mitosis also helps in wound healing by replacing the damaged cells with newly formed cells by cell division.
If I know the delta u are talking about , it is a mathematical meaning . Both meaning begin with a D just like the Greek letter , which should help u remember
Since Lithium has one valence electron that means it needs to lose it to form a stable structure. That means it's valence is equal to one. Oxygen has six atoms, in order to form a stable octet structure it needs to accept 2 electrons, therefore it's valence is 2.
Therefore two Lithium atoms bond with one oxygen atom to form Li2O