If "Lub-Dup" Describes a Heartbeat, the "Dup" Part of the Sound

question 20

Multiple Choice

If "lub-dup" describes a heartbeat, the "dup" part of the sound is caused by

• A) the apex of the heart hitting the anterior chest wall.
• B) a stenotic atrioventricular valve.
• C) the large force of the contracting ventricles.
• D) vibrations that result from the semilunar valves slamming shut.

Learn about the historical development of cells and batteries.

Understand the principles of special electricity generation methods (thermocouples, piezoelectricity, solar cells).

Recognize the impact of temperature on voltage generation in thermocouples.

Understand the physical principles behind electromagnetic induction and the generation of voltage in a conductor.

---

Definitions:

Picket Lines

A boundary established by workers on strike, especially at the entrance to the place of work, meant to show unity and to discourage others from entering the premises.

Unfair Labor Practices

Actions by employers or unions that violate the rights of employees or union members, as defined by labor laws and regulations.

Cease-And-Desist Orders

Legal orders issued by a governmental authority or court to halt an activity or practice considered illegal or harmful.

U.S. Court of Appeals

A federal court system responsible for hearing appeals from district courts and certain administrative agencies.