Common symptoms of iron-deficiency anemia include muscle weakness, shortness of breath, and lightheadedness. why does iron deficiency cause these symptoms?

a.
since iron is required for fluid balance, iron deficiency increases the volume of blood that circulates in the body.
b.
since iron is required for fluid balance, iron deficiency decreases the volume of blood that circulates in the body.
c.
since iron is required make hemoglobin and myoglobin, iron deficiency decreases the amount of carbon dioxide in the blood and in the muscles.
d.
since iron is required to make hemoglobin and myoglobin, iron deficiency decreases the amount of oxygen in the blood and in the muscles.

D. Since iron is required to make hemoglobin and myoglobin, iron deficiency decreases the amount of oxygen in the blood and in the muscles.

Explanation:

Anemia, in fact, is a syndrome, which can accompany several diseases. The oxygenation process depends on hemoglobin, which is in the red blood cell, in addition to breathing and circulation itself, and there may be some type of compensation between these components in situations of a more discrete problem. The fact is that a sub-normal amount of hemoglobin reduces the blood's ability to carry oxygen, which activates a series of correction mechanisms.

Myoglobin, in turn, is responsible for maintaining the oxygen supply at the sites.

Both hemoglobin and myoglobin need iron molecules in their structure. Therefore, iron deficiency prevents these proteins from working by decreasing the amount of oxygen in the blood and muscles. As a result, an individual may experience muscle weakness, shortness of breath and dizziness.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.