Nokea
Which of the ff vessels is often used for grafting?
- A. The basic and cephalic veins in the arm
- B. The internal mammary and internal thoracic arteries in the chest
- C. The saphenous vein in the leg
- D. The radial artery in the arm
Correct Answer: B
Rationale: The correct answer is B because the internal mammary and internal thoracic arteries in the chest are commonly used for grafting due to their size, durability, and long-term patency. These arteries have a better track record for successful grafting procedures compared to the other options. The basic and cephalic veins in the arm (Option A) are typically used for venous procedures, not arterial grafting. The saphenous vein in the leg (Option C) is also commonly used for grafting, but the internal mammary and internal thoracic arteries are preferred for their better outcomes. The radial artery in the arm (Option D) is less commonly used for grafting compared to the internal mammary and internal thoracic arteries.
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The nurse knows which of the following is true about immunity?
- A. Antibody-mediated defense occurs through the T-cell system
- B. Cellular immunity is mediated by antibodies produced by the B-cells
- C. Antibodies are produced by the B-cells
- D. Lymphocytes increase with an allergic response
Correct Answer: C
Rationale: Rationale:
Choice C is correct because antibodies are indeed produced by B-cells as part of the adaptive immune response. B-cells differentiate into plasma cells that produce antibodies to target specific antigens. This process is essential for generating immunity against pathogens.
Incorrect Choices:
A: Antibody-mediated defense occurs through the B-cell system, not the T-cell system. T-cells are involved in cell-mediated immunity.
B: Cellular immunity is mediated by T-cells, not antibodies produced by B-cells. T-cells directly attack infected cells.
D: Lymphocytes can increase during an allergic response, but this does not specifically relate to immunity through antibody production by B-cells.
A client is scheduled for surgery for an abdominal hysterectomy. During the preoperative assessment, the client states, 'I am very nervous and scared to have surgery.' What client outcome is the priority?
- A. Evaluate the need for antibiotics.
- B. Resolve the client’s anxiety.
- C. Provide preoperative education.
- D. Prepare the client for surgery.
Correct Answer: B
Rationale: The correct answer is B: Resolve the client’s anxiety. Addressing the client's anxiety is the priority because it can impact their overall surgical experience, recovery, and outcomes. Resolving anxiety can improve the client's emotional well-being, enhance cooperation during surgery, and reduce postoperative complications related to stress. Providing emotional support and reassurance should be the initial focus to help the client feel more comfortable and confident about the upcoming surgery. The other choices are not the priority in this situation: A) Evaluating the need for antibiotics can be addressed later in the preoperative process, C) Providing preoperative education is important but not the immediate priority over addressing anxiety, and D) Preparing the client for surgery includes various components, but emotional well-being should be addressed first.
A client becomes upset when the physician diagnoses diabetes mellitus as the cause of current signs and symptoms. The client tells the nurse, “This must be a mistake. No one in my family has ever had diabetes.” Based on this statement, the nurse suspects the client is using which coping mechanism?
- A. Denial
- B. Anger
- C. Withdrawal
- D. Resolution
Correct Answer: A
Rationale: The correct answer is A: Denial. The client's refusal to accept the diagnosis of diabetes mellitus, stating that no one in their family has had it, indicates denial as a coping mechanism. Denial is a defense mechanism where individuals refuse to acknowledge unpleasant realities. In this case, the client is rejecting the diagnosis to avoid facing the reality of having a chronic condition. The other choices (B: Anger, C: Withdrawal, D: Resolution) do not fit the client's response in this scenario. Anger involves expressing frustration or hostility, withdrawal is avoiding the situation, and resolution is accepting and dealing with the issue.
Which of the ff causes memory cells to convert to plasma cells?
- A. An organ transplant
- B. Re-exposure to a specific antigen
- C. Release of lymphokines
- D. Initial exposure to an antigen
Correct Answer: B
Rationale: The correct answer is B: Re-exposure to a specific antigen. Memory cells are formed after initial exposure to an antigen. Upon re-exposure to the same antigen, memory cells quickly recognize and respond, converting into plasma cells to produce antibodies. This process is known as secondary immune response.
Incorrect choices:
A: An organ transplant - Organ transplant does not involve the conversion of memory cells to plasma cells.
C: Release of lymphokines - Lymphokines are signaling molecules secreted by immune cells but do not directly cause memory cells to convert to plasma cells.
D: Initial exposure to an antigen - Initial exposure to an antigen leads to the formation of memory cells, not their conversion to plasma cells upon re-exposure.
Which of the ff. nursing actions is most appropriate when doing perineal care on an uncircumcised male patient?
- A. Leave the foreskin retracted so air can keep the area dry
- B. Do not retract the foreskin during washing
- C. Replace the foreskin over the head of the penis after washing
- D. Use alcohol and a cotton swab to clean under the foreskin
Correct Answer: C
Rationale: The correct answer is C, which is to replace the foreskin over the head of the penis after washing. This is important to prevent any irritation or injury to the sensitive foreskin and glans. Leaving the foreskin retracted (A) can lead to discomfort and potential injury. Not retracting the foreskin (B) may not allow for proper cleaning. Using alcohol and a cotton swab (D) can be too harsh and irritating to the delicate tissues. Therefore, option C is the most appropriate and gentle approach to maintain proper hygiene and prevent any complications.