Nursing Elites

1. Which of the following types of hormones can diffuse through the cell membrane to bind to receptors inside the cell and stimulate a chemical response to a target cell?

• A. fat-soluble hormones
• B. amino acid derivatives
• C. hydrophilic hormones
• D. water-soluble hormones

Correct answer: A

Rationale: The correct answer is A: fat-soluble hormones. Fat-soluble hormones are able to diffuse through the cell membrane to bind to receptors inside the cell. This is because they are lipophilic, allowing them to cross the lipid bilayer easily. Once inside the cell, fat-soluble hormones can directly affect gene expression or cell function. Choice B, amino acid derivatives, and choice C, hydrophilic hormones, are not able to diffuse through the cell membrane as they are not lipophilic. Therefore, they cannot bind to receptors inside the cell. Choice D, water-soluble hormones, also cannot diffuse through the cell membrane as it is hydrophilic, making it unable to reach receptors inside the cell.

2. Which of the following is not part of the central nervous system?

• A. Retina
• B. Spinal cord
• C. Brain
• D. Heart

Correct answer: B

Rationale: The central nervous system consists of the brain and spinal cord, which are responsible for processing and coordinating information. The retina is part of the eye, while the heart is part of the circulatory system. Therefore, the correct answer is 'Spinal cord' as it is not part of the central nervous system.

3. Choose the meaning of the word 'winnowed' in the following sentence: 'One by one, the applicants were winnowed out of the group.'

• A. Escorted
• B. Separated
• C. Elevated
• D. Summoned

Correct answer: B

Rationale: In this context, the word 'winnowed' means to separate or eliminate less desirable individuals from a larger group, indicating that the applicants were being sifted out or singled out in this process. Therefore, the most appropriate meaning among the choices provided is 'separated.' 'Escorted' (Choice A) implies being accompanied or guided, which is not the intended meaning. 'Elevated' (Choice C) means raised or lifted, which does not fit the context. 'Summoned' (Choice D) suggests being called or requested to attend, which is also not the correct meaning in this context.

4. Enthalpy (H) is a thermodynamic property defined as the sum of a system's internal energy (U) and the product of its pressure (P) and volume (V). The relationship between these is:

• A. H = U + PV
• B. H = U - PV
• C. H = U / PV
• D. H = PV / U

Correct answer: A

Rationale: Enthalpy (H) is defined as H = U + PV, where U represents internal energy, P is pressure, and V is volume. Enthalpy includes both the internal energy of a system and the energy required to create space for the system against an external pressure. Therefore, the correct relationship between enthalpy, internal energy, pressure, and volume is H = U + PV. Choice B is incorrect as subtracting PV would not account for the work done against pressure. Choice C is incorrect as dividing U by PV doesn't represent the definition of enthalpy. Choice D is incorrect as dividing PV by U is not the correct relationship based on the definition of enthalpy.

5. What does 'deteriorating' mean?

• A. Improving
• B. Worsening
• C. Staying the same
• D. Fluctuating

Correct answer: B

Rationale: The correct answer is B, 'Worsening.' Deteriorating refers to something getting worse over time, not improving (choice A), staying the same (choice C), or fluctuating (choice D).

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