Which of the following is not true about the structure of an alveolus?

a. it has thick walls to trap gases that enter during the breathing
b. it has many capillaries running through its structure
c. it has high surface area allow lots of gas exchange
d. it has high concentration of oxygen and low concentration of carbon dioxide

gas

explanation:

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Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.