third one, all of the above
Answer:
No, because even though the EAR estimates the needs of only 50% of individuals in a life-stage and gender group, all of us have individual requirements for nutrients.
Answer:
Explanation:The simple squamous epithelium formed by type I alveolar cells is attached to a thin, elastic basement membrane. This epithelium is extremely thin and borders the endothelial membrane of capillaries. Taken together, the alveoli and capillary membranes form a respiratory membrane that is approximately 0.5 mm thick.