HESI A2 Biology Practice Test

Correct Answer: A

Rationale: To convert cm to mm, you multiply by 10 since 1 cm = 10 mm. Therefore, to convert 8 cm to mm, you multiply 8 by 10 which equals 80 mm. Choice A (80 mm) is correct. Option B (800 mm) is incorrect as it is 10 times the correct answer, making it too large. Option C (8 mm) is incorrect as it represents the original measurement in cm, not the conversion to mm. Option D (0.8 mm) is incorrect as it is one-tenth of the correct answer, making it too small.

Correct Answer: B

Rationale: The correct answer is B: smooth ER. The smooth ER is responsible for detoxifying multiple molecules through processes like drug metabolism and lipid synthesis. It contains enzymes that help break down toxins. The rough ER is primarily involved in protein synthesis, so it is not directly related to detoxification. Lysosomes are involved in breaking down cellular waste and are not specialized for detoxification. The Golgi apparatus is responsible for packaging and modifying proteins for transport, not detoxifying molecules. Therefore, the smooth ER is the most suitable organelle for detoxifying multiple molecules in a cell.

Correct Answer: B

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: B

Rationale: The correct answer is B because of osmosis. Saltwater has a higher concentration of solute than the egg, causing water to move out of the egg, leading to shrinkage. A is incorrect as the egg will lose water, not expand. C is incorrect as there will be a change due to osmosis. D is incorrect as an effect will occur.

Correct Answer: D

Rationale: The correct answer is D because all the statements mentioned in choices A, B, and C are true. A: The respiratory system consists of all organs involved in breathing, including the nose, pharynx, larynx, trachea, bronchi, and lungs. B: Organs included in the respiratory system are the nose, pharynx, larynx, trachea, bronchi, and lungs. C: The respiratory system conveys oxygen into our bodies and removes carbon dioxide from our bodies. Therefore, as all three statements are true, the correct answer is D - All of the Above. The other choices are incorrect because they do not encompass all the organs involved in the respiratory system or the functions it performs.