which of the following is an organ of the respiratory system brain larynx urethra pancreas
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HESI A2

Anatomy and Physiology Hesi A2 Practice Test

1. Which of the following is an organ of the respiratory system?

Correct answer: D

Rationale: The larynx is a vital organ of the respiratory system, responsible for producing sound and connecting the pharynx to the trachea. It plays a crucial role in breathing, swallowing, and vocalization. The brain, pancreas, and urethra are not part of the respiratory system; the brain is part of the nervous system, the pancreas is part of the digestive system, and the urethra is part of the urinary system. Therefore, the correct answer is the larynx.

2. A person who is ravenous is:

Correct answer: D

Rationale: The correct answer is D: "hungry." The term 'ravenous' specifically refers to being extremely hungry or famished. Choices A, B, and C are incorrect because they do not accurately reflect the meaning of 'ravenous.' Being generous, outspoken, or friendly does not directly relate to the intense hunger implied by the word 'ravenous.'

3. What is a Contraindication?

Correct answer: B

Rationale: A contraindication is a specific situation in which a drug, procedure, or treatment should not be used because it may be harmful. Choice A is incorrect because a contraindication advises against performing an action. Choice C is incorrect as it refers to a precaution regarding side effects rather than a reason not to proceed. Choice D is incorrect because a contraindication does not advise the use of something.

4. A pressure vessel has a cylindrical body (diameter 10cm, height 20cm) with hemispherical ends (same diameter as the cylinder). What is its total surface area?

Correct answer: D

Rationale: To find the total surface area, we need to calculate the surface area of the cylindrical body and both hemispherical ends separately. The surface area of the cylinder is the sum of the lateral surface area (2πrh) and the area of the two circular bases (2πr^2). For the hemispheres, the surface area of one hemisphere is (2πr^2), so for two hemispheres, it would be (4πr^2). Given that the diameter of the cylinder and hemispherical ends is 10cm, the radius (r) is 5cm. Calculating the individual surface areas: Cylinder = 2π(5)(20) + 2π(5)^2 = 200π + 50π = 250π. Hemispheres = 4π(5)^2 = 100π. Adding these together gives a total surface area of 250π + 100π = 350π cm^2, which is approximately equal to 2055 sq cm. Therefore, the correct answer is D. Choice A (785 sq cm) is incorrect as it is significantly lower than the correct calculation. Choices B (1130 sq cm) and C (1570 sq cm) are also incorrect as they do not reflect the accurate surface area calculation for the given dimensions.

5. Which term refers to someone who has come to settle in the United States?

Correct answer: C

Rationale: The correct answer is 'C: Immigrant.' An immigrant is a person who comes to live permanently in a foreign country, such as the United States. Choice A, 'Immigrate,' refers to the action of entering a foreign country to live there. Choice B, 'Migrate,' means to move from one place to another. Choice D, 'Emigrant,' is someone who leaves their own country to settle permanently in another.

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