When a person travels to areas of higher altitudes, his or her blood oxygen level decreases. After the person has been exposed to lower oxygen for a period of several weeks, they produce more red blood cells than normal. — Explain why this response occurs.
— Explain what will happen when the body returns to its normal altitude and oxygen level.

Which of the following is a nonspecific defense against pathogens? - b cells - antibodies - t-cells - inflammation

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.

Drag the tiles to the correct boxes to complete the pairs. match the academic requirements with the careers.