HESI A2
HESI A2 Anatomy and Physiology Practice Exam
1. Which organ system is largely responsible for controlling stress?
- A. The endocrine system
- B. The digestive system
- C. The lymphatic system
- D. The respiratory system
Correct answer: A
Rationale: The endocrine system is largely responsible for controlling stress through the release of hormones such as cortisol and adrenaline. These hormones help regulate the body's response to stress by increasing heart rate, blood pressure, and energy production. The endocrine system plays a crucial role in the body's stress response and helps the body adapt to and cope with stressful situations. The digestive system (Choice B) is primarily responsible for breaking down food and absorbing nutrients, not controlling stress. The lymphatic system (Choice C) is responsible for immune function and maintaining fluid balance, not controlling stress. The respiratory system (Choice D) is responsible for the exchange of oxygen and carbon dioxide, not controlling stress.
2. What type of reactions take place in the nucleus to achieve stable nuclear configurations?
- A. Chemical
- B. Nuclear
- C. Physical
- D. Mechanical
Correct answer: B
Rationale: Nuclear reactions occur within the nucleus to achieve stable nuclear configurations. These reactions involve changes in the composition of atomic nuclei, leading to the formation of more stable elements. Chemical reactions occur in the electron cloud surrounding the nucleus, while physical and mechanical processes do not directly impact the stability of nuclear configurations. Therefore, the correct answer is 'Nuclear.'
3. Gerald can bake 3 dozen cookies in 30 minutes. How long will it take him to bake 12 dozen cookies?
- A. 90 minutes
- B. 1 hour 40 minutes
- C. 2 hours
- D. 4 hours
Correct answer: B
Rationale: If Gerald can bake 3 dozen cookies in 30 minutes, then he can bake 1 dozen cookies in 10 minutes (30 minutes / 3 = 10 minutes). To bake 12 dozen cookies, it would take him 120 minutes (12 dozen x 10 minutes = 120 minutes), which is equivalent to 1 hour and 40 minutes. Choice A (90 minutes) is incorrect because it does not account for the correct proportion of cookies baked. Choice C (2 hours) and Choice D (4 hours) are incorrect as they overestimate the time required based on the given information.
4. Which enzyme functions to break down lactose, a specific sugar found in milk and dairy products?
- A. Catalase
- B. Lipase
- C. Protease
- D. Lactase
Correct answer: D
Rationale: Lactase is the enzyme responsible for breaking down lactose, a sugar present in milk and dairy products. When lactase breaks down lactose, it splits it into two simpler sugars, glucose, and galactose, which can then be absorbed and used by the body. Catalase is involved in breaking down hydrogen peroxide into water and oxygen. Lipase breaks down fats into fatty acids and glycerol. Protease breaks down proteins into amino acids. Therefore, choices A, B, and C are incorrect for the specific breakdown of lactose.
5. Which word is not spelled correctly in the context of the following sentence? To succeed in this position, it is necessary to manage people well.
- A. succeed
- B. position
- C. necessary
- D. manage
Correct answer: D
Rationale: The word 'manage' is misspelled as 'menage' in the sentence. The correct spelling of the word is 'manage.' Therefore, the correct answer is 'D: manage.' Choices A, B, and C are all spelled correctly in the context of the sentence.
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