Correct Answer: D

Rationale: Before initiating any oxygen therapy, it is crucial for the nurse to first assess the patient's condition. This step allows the nurse to determine the patient's oxygen saturation levels, respiratory rate, lung sounds, and overall respiratory status. Understanding the patient's baseline condition helps in selecting the appropriate oxygen delivery method and flow rate that will best meet the patient's needs. Additionally, assessing the patient's condition allows the nurse to monitor the effectiveness of the oxygen therapy and make any necessary adjustments throughout the treatment process. Therefore, assessing the patient's condition is the necessary first step in providing safe and effective oxygen therapy.

Correct Answer: B

Rationale: The nurse's best approach to address non-compliance with prescribed medications and treatment plans is to actively listen to the patient's reasons for non-compliance. By acknowledging and addressing any barriers or concerns the patient may have, the nurse can work collaboratively with the patient to find effective solutions. This approach promotes open communication, trust, and a patient-centered care plan that takes into consideration the patient's individual needs and circumstances. Dismissing the patient's reasons (choice A), ignoring the non-compliance (choice C), or resorting to a confrontational approach (choice D) are less effective strategies that may lead to further resistance and hinder the patient's willingness to engage in their treatment.

Correct Answer: C

Rationale: The submandibular gland is located inferior and posterior to the mandible. It produces a mixed type of saliva, which is primarily serous (enzyme-rich) but also contains some mucous components. This gland plays a significant role in digestion, as its serous saliva contains enzymes such as amylase that help break down carbohydrates in the mouth before they reach the stomach.

Correct Answer: A

Rationale: Smoking is a harmful habit that is known to contribute to a variety of health problems, including heart disease, lung disease, and cancer. Smoking does not provide any benefits for Alzheimer's patients and, in fact, can worsen the condition due to its negative impact on overall health. Therefore, smoking does not help improve Alzheimer's and may exacerbate the symptoms and complications associated with the disease.

Correct Answer: A

Rationale: Polycystic ovary syndrome (PCOS) is a common hormonal disorder in women of reproductive age. The classic symptoms of PCOS include irregular menstrual cycles, hirsutism (excess hair growth in a male pattern), and acne. Women with PCOS often have enlarged ovaries with multiple small cysts. Other common features include obesity, insulin resistance, and infertility. Endometriosis is characterized by the presence and growth of endometrial-like tissue outside the uterus, leading to symptoms such as pelvic pain and infertility. Ovarian cancer usually presents with nonspecific symptoms and is less likely in a young woman with these specific symptoms. Uterine fibroids are benign tumors that can cause heavy menstrual bleeding and pelvic pressure but are less likely to be associated with hirsutism and acne.