A nursing student preparing for his first clinical rotation must receive a hepatitis B vaccination series prior to attending clinicals. The nursing student understands that this is

A. The client is resting comfortably, denies distress, and has an oxygen saturation of 89% on 2 liters of supplemental oxygen. This is within an acceptable range for many patients with COPD. Given the client's current status, it is appropriate to continue monitoring the oxygen saturation and assess for any changes in condition.
B. While the alarm may be annoying, it is important to keep it active to alert the nurse to any significant changes in the client's oxygen saturation.
C. A non-rebreather mask delivers a higher concentration of oxygen and is typically used in more critical situations. In this case, the client's oxygen saturation is within a safe range, and there is no need to increase the oxygen delivery method.
D. Increasing the oxygen to 4 liters per minute without a clear indication of need could lead to oxygen toxicity, especially in patients with COPD. It is important to titrate oxygen therapy to the lowest level that maintains adequate oxygen saturation.

A. Parkinson's disease is not generally considered to be caused by an autoimmune reaction or a recent infection. Autoimmune reactions leading to neurodegeneration are more commonly associated with other conditions such as multiple sclerosis, not Parkinson's disease.
B. The exact cause of Parkinson's disease is indeed unknown, but research suggests that it results from a combination of genetic predispositions and environmental factors. Genetic mutations may contribute to the development of Parkinson's disease in some individuals, while environmental factors such as exposure to certain toxins or other external influences might also play a role. The interplay between these factors is still being studied.
C. There is no evidence to support the idea that Parkinson's disease is caused by the reactivation of a virus affecting cranial nerve VII (the facial nerve). Parkinson's disease involves the degeneration of dopamine-producing neurons in the brain, not specifically related to viral reactivation or isolated to cranial nerve VII.
D. Demyelination of nerves is characteristic of multiple sclerosis, not Parkinson's disease. In Parkinson's disease, the primary issue is the loss of dopamine-producing neurons in the substantia nigra of the brain, not demyelination. This option describes a different pathological process unrelated to Parkinson's disease.