18. alcohol reduces the amount of oxygen that enters your bloodstream by a. decreasing brain function b. slowing down your respiration c. increasing your heart rate d. all of the above

Alcohol reduces the amount of oxygen that enters your bloodstream by B; slowing down your respirations.

Explanation:

When a person consumes alcohol this affects the pulmonary system in the body. This is the system the body uses to get oxygen to the blood. This also takes the carbon dioxide out of the blood. When alcohol is consumed all of the parts of the system is affected including the lungs. Since alcohol reduces the respirations of person drinking this will cause the oxygen in your blood to be reduced.

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