Refer to the Figure

question 51

Multiple Choice

Refer to the figure. Which level of structure is maintained by the disulfide bond?

• A) primary
• B) secondary
• C) tertiary
• D) quaternary

---

Definitions:

Atria

The heart's two top chambers that take in blood from the veins and move it to the ventricles.

Cardiac Tamponade

A critical condition where fluid accumulates in the sac surrounding the heart, restricting its ability to pump blood.

Preload

The degree of stretch of the cardiac muscle fibers at the end of diastole, prior to contraction; it affects the force of contraction and cardiac output.

Stroke Volume

The amount of blood the heart pumps out of a ventricle with each beat.