Which of the following represents the correct pathway of blood moving from the superior vena cava to the lungs?

Correct Answer: A

Rationale: Blood from the superior vena cava enters the right atrium, passes through the tricuspid valve to the right ventricle, and exits via the pulmonary semilunar valve to the lungs.

Correct Answer: C

Rationale: Initially, the treatment goal in hypertensive emergencies is to reduce the mean arterial pressure by 25 % in the first hour of treatment, with further reduction over the next 24 hours. Lowering the BP too fast may cause hypotension in a patient whose body has adjusted to hypertension and could cause a stroke, MI, or visual changes. Neurologic symptoms should be addressed, but this is not the primary focus of treatment planning.

Correct Answer: D

Rationale: Hypertension, particularly elevated systolic BP, increases the risk of death, stroke, and heart failure in people older than 50 years. Hypertension is not a direct precursor to pulmonary emboli, and it does not put older adults at increased risk of type 1 diabetes or cancer. It is not the leading cause of death in people 55 years of age.

Correct Answer: B

Rationale: Delayed depolarisation occurs in myocardial infarction due to ischemic damage affecting the conduction system.

Correct Answer: C

Rationale: Inhibition of NO synthase reduces nitric oxide production, promptly raising blood pressure.