An individual suﬀers severe blunt trauma to the thoracic cavity. Which of the following organs are at greatest risk from this injury?

Heart and lungs

Brain and spinal cord

Liver and stomach

Large and small intestines

Answer and Explanation

The Correct Answer is A

Heart and lungs. The thoracic cavity contains the heart and lungs, which are at greatest risk from severe blunt trauma to this area.

B. The brain and spinal cord are not located in the thoracic cavity and are therefore not at greatest risk from blunt trauma to this area.

C. The liver and stomach are located in the abdominal cavity, which is below the thoracic cavity. While these organs may be aﬀected by severe blunt trauma to the thoracic cavity, they are not at the greatest risk.

D. The large and small intestines are also located in the abdominal cavity and are not at the greatest risk from blunt trauma to the thoracic cavity.

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Correct Answer is B

Explanation

Emphysema is a lung condition that is caused by damage to the alveoli, the tiny air sacs in the lungs where gas exchange occurs. When the alveoli are damaged, the body has difficulty exchanging oxygen and carbon dioxide. This can lead to shortness of breath and other respiratory problems. The other options are not directly related to the function of the alveoli or the eﬀects of emphysema.

A. A more desirable product is often formed. B. The reaction is completed in a shorter amount of time. C. A greater amount of heat energy is released by the reaction. D. The yield of product is increased.

Correct Answer is B

Explanation

The result of using a catalyst in a chemical reaction is that the reaction is completed in a shorter amount of time. A catalyst is a chemical substance that aﬀects the rate of a chemical reaction by altering the activation energy required for the reaction to proceed. This process is called catalysis. A catalyst provides an alternative pathway for the reaction, one that has a lower activation energy than the uncatalyzed pathway.

The other options are not correct because they do not accurately describe the result of using a catalyst in a chemical reaction. A more desirable product is not necessarily formed, a greater amount of heat energy is not necessarily released by the reaction, and the yield of the product is not necessarily increased as a result of using a catalyst.

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An individual suﬀers severe blunt trauma to the thoracic cavity. Which of the following organs are at greatest risk from this injury?

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Naxlex Comprehensive Predictor Exams

Emphysema caused by damage to alveoli from toxins and pollutants is likely to result in the body having difficulty performing which of the following actions?

Correct Answer is B

Explanation

Which of the following best describes the result of using a catalyst in a chemical reaction?

Correct Answer is B

Explanation

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