Blood Pressure Regulation

All of the following are mechanisms by which the baroreceptor reflex increases blood pressure EXCEPT:

All of the following hormones contribute to long-term blood pressure regulation EXCEPT:

A 52-year-old man with a 10-year history of hypertension presents to the emergency department with a blood pressure of 240/140 mmHg, severe headache, and blurred vision. Fundoscopy reveals flame-shaped hemorrhages and cotton-wool spots. Serum creatinine is 2.8 mg/dL (baseline 1.0 mg/dL). What is the most appropriate immediate next step in management?

A 38-year-old woman with newly diagnosed hypertension (BP 158/98 mmHg on three separate visits) and no symptoms or signs of end-organ damage is seen in the outpatient clinic. Routine investigations (ECG, chest X-ray, serum creatinine, urinalysis) are normal. She denies secondary causes. What is the most appropriate next step in management?

A 52-year-old man from Delhi presents to the emergency department with sudden-onset severe headache, blurred vision, and epistaxis. His blood pressure is 210/140 mmHg. On fundoscopy, flame-shaped hemorrhages and cotton-wool spots are noted. Serum creatinine is 2.8 mg/dL (baseline 1.0 mg/dL). Urinalysis shows 3+ proteinuria and RBC casts. What is the primary mechanism responsible for the acute end-organ damage observed in this patient?