HESI A2
HESI A2 Anatomy and Physiology Quizlet
1. Which part of the brain is responsible for regulating emotions and memory?
- A. Cerebrum
- B. Cerebellum
- C. Amygdala
- D. Brainstem
Correct answer: C
Rationale: The amygdala, located in the temporal lobe of the brain, is responsible for regulating emotions and memory, particularly those related to fear and pleasure. It plays a crucial role in processing emotional responses, forming emotional memories, and modulating emotional reactions. The cerebrum (Choice A) is responsible for higher brain functions such as thought and action. The cerebellum (Choice B) is mainly involved in coordination and balance. The brainstem (Choice D) controls basic life functions such as breathing and heart rate.
2. Precipitous is best defined as being ____?
- A. Slow
- B. Swift
- C. Gradual
- D. Delayed
Correct answer: B
Rationale: The correct answer is B: 'Swift.' Precipitous is used to describe something that is steep, sheer, or done suddenly and without careful consideration. For example, a precipitous drop in the stock market. 'Slow' (Choice A), 'Gradual' (Choice C), and 'Delayed' (Choice D) do not align with the meaning of precipitous and are therefore incorrect.
3. Which intermolecular force is the strongest?
- A. Dipole interactions
- B. Dispersion forces
- C. Hydrogen bonding
- D. Van der Waals forces
Correct answer: C
Rationale: Hydrogen bonding is the strongest intermolecular force due to its specific interaction between a hydrogen atom and a highly electronegative atom like nitrogen, oxygen, or fluorine. This type of bonding results in a very strong attraction between molecules, making it the strongest intermolecular force among the options provided. Dipole interactions (choice A) are weaker than hydrogen bonding as they occur between polar molecules. Dispersion forces (choice B) are the weakest intermolecular forces and are caused by temporary fluctuations in electron distribution. Van der Waals forces (choice D) are a broader term that encompasses dipole interactions and dispersion forces, making them weaker than hydrogen bonding.
4. What does Vacuous mean?
- A. Empty
- B. Full
- C. Dense
- D. Bright
Correct answer: A
Rationale: The correct answer is A: 'Empty.' Vacuous means lacking intelligence, empty-headed, or devoid of substance. Choice B, 'Full,' is incorrect as it is the opposite of vacuous. Choice C, 'Dense,' means closely compacted or stupid, not vacuous. Choice D, 'Bright,' means giving out or reflecting a lot of light, not vacuous.
5. What does respite mean?
- A. Rest
- B. Relief
- C. Pain
- D. Burden
Correct answer: B
Rationale: Respite means a period of rest or relief. It refers to a temporary break or relief from something challenging or stressful. It is a time to relax and recharge, providing a sense of ease or comfort rather than pain or burden. 'Rest' (choice A) is related to respite but does not capture the aspect of temporary relief. 'Pain' (choice C) and 'Burden' (choice D) are opposite in meaning to respite, as they signify discomfort and heaviness, respectively, which are not synonymous with the concept of respite.
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