For gas exchange to be efficient, the respiratory membrane must be
a. between 5 and 6 micrometers thick.
b. at least 3 micrometers thick.
c. 0.5 to 1 micrometer thick.
d. the thickness of the respiratory membrane is not important in the efficiency of gas exchange. 4 points

Vitamin d is unique in that it has a site of synthesis that is different from the location of action, so it is considered to be a click the answer you think is right. enzyme. lipase. nonessential nutrient. hormone?

Does indrect sunlight does not pose any danger to the skin

In one paragraph, explain how technology has influenced the perception of body image and weight management in both negative and positive ways. use supporting details in the form of facts, statistics, and examples. in another paragraph, describe an individual healthy weight-management plan. the plan should include specific details about goals, diet, exercise, and evaluative monitoring.