The First Heart Sound Is the Closing of the

question 74

Multiple Choice

The first heart sound is the closing of the

• A) pulmonary semilunar and aortic semilunar valves
• B) tricuspid and mitral valves
• C) mitral and bicuspid valves
• D) tricuspid and pulmonary semilunar valves

---

Definitions:

Buyer

An individual or entity that purchases goods or services for personal use or in the course of business operations.

Seller

An individual, company, or entity that provides goods or services to buyers in exchange for money or other compensation.

Economy's Income

The total wealth and resources generated and distributed within an economy.

Economy's Expenditure

The total spending in an economy, including consumption, investment, government purchases, and net exports.