HESI RN
Biology Practice Test
1. What is the composition of the cellular membrane?
- A. A bilayer of phospholipid molecules
- B. A single layer of phospholipid molecules
- C. Proteins that act as transport highways
- D. Carbohydrates
Correct answer: A
Rationale: The cellular membrane is primarily composed of a phospholipid bilayer, which consists of two layers of phospholipid molecules. These molecules have a hydrophilic (water-attracting) head and hydrophobic (water-repelling) tail, creating a barrier that separates the internal cellular environment from the external surroundings. While proteins are embedded within this bilayer and act as transport channels, receptors, and structural support, carbohydrates are found on the outer surface of the membrane for cell recognition and signaling purposes. Therefore, the correct answer is a bilayer of phospholipid molecules.
2. When preparing a client who has had a total laryngectomy for discharge, what instruction is most important for the nurse to include in the discharge teaching?
- A. Recommend that the client carry suction equipment at all times.
- B. Instruct the client to have writing materials with them at all times.
- C. Tell the client to carry a medic alert card stating that they are a total neck breather.
- D. Tell the client not to travel alone.
Correct answer: C
Rationale: The most crucial instruction for a client who has had a total laryngectomy is to carry a medic alert card stating that they are a total neck breather. This is important because if they experience a cardiac arrest, mouth-to-neck breathing may be required. Choice A about carrying suction equipment is not the most critical as the client may not always need it. Choice B is not as essential as having a medic alert card. Choice D is not directly related to the client's safety due to their laryngectomy.
3. Which of the following is a primary goal of nursing?
- A. Assist patients in achieving a peaceful death.
- B. Enhance personal knowledge and skills to improve patient outcomes.
- C. Champion quality of life over quantity of life.
- D. Manage costs to enhance patients' quality of life.
Correct answer: A
Rationale: The primary goal of nursing is to assist patients in achieving a peaceful death if recovery is not feasible. This involves providing comfort, dignity, and support during the end-of-life process. Choice B is incorrect because while improving personal knowledge and skills is important, it is not the primary goal of nursing. Choice C, advocating for quality of life over quantity of life, is a valid aspect of nursing care but may not always be the primary goal. Choice D, managing costs to enhance patients' quality of life, is not a primary goal of nursing, as the focus should primarily be on patient care and well-being, rather than financial considerations.
4. The nurse is developing a teaching plan for a client receiving chemotherapy. Which of the following should be the nurse's first priority?
- A. The client will maintain adequate nutrition.
- B. The client will manage side effects of treatment.
- C. The client will recognize signs and symptoms of infection.
- D. The client will experience a reduction in pain.
Correct answer: C
Rationale: The correct answer is C. Recognizing signs and symptoms of infection should be the nurse's first priority when developing a teaching plan for a client receiving chemotherapy. Chemotherapy often compromises the immune system, making patients more susceptible to infections. Early identification and prompt treatment of infections are crucial to prevent complications. Options A, B, and D are important aspects of care but recognizing signs of infection takes precedence due to the potential life-threatening consequences in clients undergoing chemotherapy treatment.
5. A client has just returned to the nursing unit after computerized tomography (CT) with contrast medium. Which of the following actions should the nurse plan to take as part of routine after-care for this client?
- A. Administering a laxative
- B. Encouraging fluid intake
- C. Maintaining the client on strict bed rest
- D. Holding all medications for at least 2 hours
Correct answer: B
Rationale: After CT scanning with contrast medium, the client does not require special restrictions or interventions. Encouraging fluid intake is important to help flush out the contrast dye and prevent dehydration. Administering a laxative (Choice A) is unnecessary and not indicated after CT with contrast. Maintaining the client on strict bed rest (Choice C) is not necessary unless specified by the healthcare provider. Holding all medications for at least 2 hours (Choice D) is not a standard practice after CT with contrast.
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