The effectiveness of Levodopa can be reduced when taking:

Correct Answer: A

Rationale: The correct choice is Pyridoxine. Levodopa is a precursor to dopamine and is commonly used in the treatment of Parkinson's disease. Pyridoxine, also known as vitamin B6, has been shown to reduce the effectiveness of Levodopa by accelerating its conversion to dopamine in the bloodstream before it reaches the brain. This reduces the amount of Levodopa available to provide therapeutic benefit in Parkinson's disease. It is important for patients taking Levodopa to be cautious about taking vitamin B6 supplements to avoid diminishing the efficacy of their medication.

Correct Answer: D

Rationale: The thymus gland plays a crucial role in the immune system as it is primarily responsible for the maturation and differentiation of T lymphocytes (T cells). T cells are essential for cell-mediated immunity and play a key role in recognizing and attacking pathogens such as bacteria, viruses, and cancer cells. The thymus is where immature T cells mature and undergo education to ensure they can distinguish between self and non-self antigens effectively. This process is crucial for the proper functioning of the immune system to protect the body from infections and diseases.

Correct Answer: D

Rationale: A newborn who is small for gestational age (SGA) refers to a baby whose rate of intrauterine growth was slowed, leading to a birth weight falling below the 10th percentile on intrauterine growth charts. SGA infants are at an increased risk for various health complications due to their smaller size at birth, such as difficulties in regulating body temperature, low blood sugar, and respiratory distress. Postterm refers to a pregnancy that has extended beyond 42 weeks, while postmature refers specifically to a fetus that has been in the womb beyond the expected due date. Low birth weight may refer to a baby born below a certain weight threshold regardless of gestational age.

Correct Answer: A

Rationale: Homer's syndrome, also known as Horner's syndrome, is a rare condition that occurs when the sympathetic nerve supply to the eye and face is disrupted. In the case of lung cancer invading the ribs and affecting the sympathetic nerve ganglia, it can lead to Homer's syndrome. The classic triad of symptoms in Homer's syndrome includes miosis (constriction of the pupil), partial eyelid ptosis (drooping of the upper eyelid), and anhidrosis (lack of sweating) on the affected side of the face. These symptoms result from the disruption of sympathetic nerve pathways affecting the pupillary dilator muscle, the Müller muscle responsible for eyelid elevation, and sweat glands on one side of the face. Therefore, when assessing for signs and symptoms of Homer's syndrome in this client, the nurse should focus on looking for these specific manifestations.

Correct Answer: B

Rationale: An adolescent girl with severe weight loss and disrupted metabolism associated with anorexia nervosa is likely to exhibit tachycardia (rapid heart rate) and tachypnea (rapid breathing). These symptoms are common manifestations of the body's response to malnutrition and starvation. Tachycardia occurs as a compensatory mechanism to maintain an adequate supply of oxygen to vital organs, while tachypnea helps to eliminate excess carbon dioxide due to metabolic imbalances. It is essential for the nurse to recognize these signs during the physical assessment as they indicate the severity of the condition and the need for immediate intervention to prevent further complications. Dysmenorrhea and oliguria, heat intolerance and increased blood pressure, and lowered body temperature and brittle nails are not typically associated with the physical manifestations of anorexia nervosa.