The most common cause of endocrine disorders is:

A. Left-sided heart failure primarily leads to pulmonary symptoms, such as shortness of breath and fluid accumulation in the lungs, rather than peripheral edema, hepatomegaly, or ascites.

B. Endocarditis is an infection of the heart valves and does not typically cause the combination of peripheral edema, hepatomegaly, ascites, and splenomegaly.

C. Myocardial infarction (MI) can lead to heart failure, but the specific symptoms of peripheral edema, hepatomegaly, ascites, and splenomegaly are more characteristic of right-sided heart failure rather than MI alone.

D. Right-sided heart failure causes systemic venous congestion, which leads to peripheral edema, hepatomegaly, ascites, and splenomegaly due to the backup of blood in the systemic circulation.

A. A hoarse cough may occur with partial airway obstruction, but it is not a typical sign of a complete obstruction. A total obstruction would more likely lead to inability to cough effectively.

B. A total obstruction of the airway, such as from aspirated material, can lead to rapid loss of consciousness due to the lack of oxygen reaching the brain. This is a critical emergency.

C. Inflammation of the mucosa is a response to irritation or injury but would not be the primary manifestation of a total airway obstruction.

D. Dyspnea (difficulty breathing) is common with airway obstructions, but in the case of total obstruction, the person would be unable to breathe at all, leading to more severe signs like loss of consciousness.