Which of the following is the most common risk factor for the development of ovarian cancer?

Correct Answer: A

Rationale: Nulliparity, which refers to never having given birth to a child, is the most common risk factor for the development of ovarian cancer. Women who have never been pregnant have a higher risk of developing ovarian cancer compared to those who have had children. This association is believed to be related to the uninterrupted ovulation cycles that nulliparous women experience, leading to changes in the surface epithelium of the ovary that predispose them to cancer development. Conversely, factors like early menarche, late menopause, and a family history of breast cancer are also associated with an increased risk of ovarian cancer but are not as commonly observed as nulliparity in the general population.

Correct Answer: D

Rationale: The current emphasis for public health practice has shifted towards advocating for social justice due to a growing recognition that social determinants greatly impact health outcomes. Addressing issues such as poverty, inequality, access to healthcare, discrimination, and other social factors is crucial for achieving better population health. By advocating for social justice, public health practitioners aim to create a more equitable and just society where everyone has the opportunity to lead healthy lives. This broader approach acknowledges the complex interplay between social, economic, and environmental factors in shaping health behaviors and outcomes.

Correct Answer: C

Rationale: The correct response is "Because of the normal pooling of blood in the vagina when the woman lies down to rest or sleep." This phenomenon occurs due to gravity when a woman lies down, and the blood tends to pool at the top of the vagina. When she first arises from bed, the pooled blood is released, resulting in a gush of blood. This is a normal physiological process and not typically a cause for concern.

Correct Answer: C

Rationale: In a critically ill patient admitted to the ICU with acute renal failure requiring renal replacement therapy (RRT), the healthcare team should prioritize the initiation of continuous renal replacement therapy (CRRT). CRRT is preferred in critically ill patients with hemodynamic instability as it allows for slow and continuous removal of solutes and fluids, making it a safer option compared to intermittent hemodialysis. CRRT can also provide better control of volume status and electrolyte imbalances over a longer period, which is beneficial in critically ill patients who are hemodynamically unstable. Peritoneal dialysis is not commonly used in the ICU setting for acute renal failure requiring RRT, and loop diuretics are not effective in treating acute renal failure. Temporary hemodialysis catheters may also be used, but CRRT is generally preferred in critically ill patients for better hemodynamic tolerance and control of solute and fluid removal.

Correct Answer: B

Rationale: Helping the family recognize the problem is the most appropriate intervention to assist them in performing health tasks. By recognizing the problem, the family can better understand the need for action and be motivated to take steps to address it. This intervention enables the family to become more engaged in their healthcare decision-making process and enhances their ability to effectively manage their health tasks. It empowers them to seek appropriate health resources and make informed choices in promoting their health and well-being. Ultimately, by acknowledging the problem, the family is better equipped to initiate positive changes and improve their overall health outcomes.

Correct Answer: A

Rationale: Physiologic jaundice in newborns is a common and typically benign condition caused by the immaturity of the newborn's liver. The correct statement about physiologic jaundice is that it occurs due to an imbalance between the production and elimination of bilirubin. In contrast, Option A is the false statement because it incorrectly states that physiologic jaundice is caused by impairment in the removal of bilirubin deficiency in the production of glucuronide transferase. This statement is inaccurate as physiologic jaundice results from the immature liver's reduced ability to conjugate bilirubin.

Correct Answer: A

Rationale: Natural killer (NK) cells play a vital role in the innate immune response by identifying and eliminating virus-infected cells, as well as tumor cells, without the need for prior exposure or activation. NK cells are able to detect abnormal cells by recognizing changes in the cell surface molecules, such as downregulation of MHC class I molecules. Once activated, NK cells release cytotoxic granules containing perforin and granzyme, leading to the destruction of the target cell. This direct killing mechanism is crucial for controlling viral infections and preventing the development of tumors. NK cells do not produce antibodies (option B), present antigens to T cells (option C), or release cytokines to recruit other immune cells (option D) as their primary function in the immune response.

Correct Answer: D

Rationale: Cor pulmonale is a condition characterized by right heart failure secondary to pulmonary hypertension, which is often caused by chronic hypoxemia. Chronic hypoxemia occurs in conditions such as chronic obstructive pulmonary disease (COPD) where there is limited airflow in and out of the lungs, leading to low oxygen levels in the blood. However, the specific characteristic of pulmonary hypertension leading to right heart failure distinguishes cor pulmonale from COPD. Other conditions like idiopathic pulmonary fibrosis (IPF) and pulmonary embolism (PE) may also lead to hypoxemia but are not primarily associated with pulmonary hypertension and right heart failure as in cor pulmonale.

Correct Answer: A

Rationale: In collecting a sputum specimen, the nurse should instruct Roy to breathe slowly, cough, and then expectorate into the specimen container. This ensures that the sputum sample is collected from the lower respiratory tract where it is most likely to contain pathogens or other relevant substances for analysis. By instructing Roy to breathe slowly, it helps him to take deep breaths and effectively cough to produce a good sputum sample. Additionally, asking him to expectorate directly into the specimen container helps prevent contamination from saliva or other sources, ensuring the accuracy of the specimen collected for testing.