The First Heart Sound (S₁) Occurs Because of the Closure

question 3

Multiple Choice

The first heart sound (S₁) occurs because of the closure of the:

• A) Aortic and mitral valves
• B) Mitral and tricuspid valves
• C) Pulmonic valve
• D) Aortic valve

---

Definitions:

Offer Stock

The process by which a corporation issues new shares of stock to potential buyers, typically to raise capital.

Incorporator

An individual or entity that is responsible for the creation and filing of a company's founding documents with the relevant state agency.

Incorporation

The process of legally declaring a corporate entity as separate from its owners, providing it with legal rights and obligations.

Nonprofit Corporation

A corporation that operates for educational, charitable, social, religious, civic, or humanitarian purposes rather than to earn a profit.