HESI A2
HESI A2 Anatomy and Physiology Practice Exam
1. What is the average normal body temperature in degrees Celsius?
- A. 30°C
- B. 32°C
- C. 35°C
- D. 37°C
Correct answer: D
Rationale: The average normal body temperature in degrees Celsius is 37°C. This temperature is considered the standard measurement for the human body under normal conditions. It is essential to know this baseline temperature for monitoring health and detecting abnormalities such as fever. Choice A, 30°C, is too low for the average normal body temperature. Choice B, 32°C, is also below the standard normal body temperature. Choice C, 35°C, is closer but still lower than the average normal body temperature of 37°C.
2. A newborn weighs 8 pounds 5 ounces. There are 453.59 grams per pound. What is the infant's weight in grams?
- A. A. 2268 grams
- B. B. 3629 grams
- C. C. 3770 grams
- D. D. 3856 grams
Correct answer: B
Rationale: To convert pounds and ounces to grams: 8 pounds = 8 × 453.59 = 3,628.72 grams. 5 ounces = (5 ÷ 16) × 453.59 = 141.75 grams. Total weight = 3,628.72 + 141.75 = 3,629 grams (rounded). Therefore, the infant's weight is approximately 3,629 grams. Choice A, 2268 grams, is incorrect as it does not account for the weight in ounces. Choice C, 3770 grams, is incorrect as it is not the accurate converted weight. Choice D, 3856 grams, is incorrect as it does not consider the conversion of ounces to grams.
3. Where is Thailand located?
- A. Africa
- B. Europe
- C. South America
- D. Asia
Correct answer: D
Rationale: Thailand is located in Asia, not South America. Thailand is a country in Southeast Asia known for its beautiful beaches, rich culture, and delicious cuisine. It shares borders with Myanmar, Laos, Cambodia, and Malaysia. The extract provided also mentions the country of Siam, which is now known as Thailand, indicating its location in Asia. Choices A, B, and C are incorrect as Thailand is not located in Africa, Europe, or South America.
4. Entropy (S) is a thermodynamic property related to the system's disorder. According to the second law of thermodynamics, in a spontaneous process:
- A. The total entropy of the system and surroundings increases.
- B. The total entropy of the system and surroundings decreases.
- C. The total entropy of the system remains constant.
- D. The total entropy of the surroundings increases, while the system's entropy decreases.
Correct answer: A
Rationale: The second law of thermodynamics asserts that the entropy of an isolated system (or the combined system and surroundings) will always increase in a spontaneous process, reflecting an increase in disorder. Therefore, the correct answer is that the total entropy of the system and surroundings increases. Choice B is incorrect because entropy always tends to increase in a spontaneous process, as dictated by the second law of thermodynamics. Choice C is incorrect as entropy typically increases in natural processes. Choice D is incorrect because the second law of thermodynamics states that the total entropy of the system and surroundings always increases in a spontaneous process.
5. Which vitamin is essential for the formation of red blood cells?
- A. Vitamin A
- B. Vitamin B12
- C. Vitamin C
- D. Vitamin D
Correct answer: B
Rationale: Vitamin B12 is the correct answer. It is crucial for the formation and maturation of red blood cells, playing a vital role in preventing megaloblastic anemia. Additionally, Vitamin B12 is essential for maintaining nerve function. Vitamin A is important for vision and immune function, Vitamin C is necessary for collagen synthesis and immune health, and Vitamin D is crucial for bone health and immune function. Therefore, options A, C, and D are incorrect as they do not play a direct role in the formation of red blood cells.
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