Anatomy & Physiology Cardiac #1

Question

Which is the conduit for the pumping action of the heart?

Answers

  1. The lungs
    • Rationale:

      While the heart lies between each lung, they are not the conduit for the pumping action of the cardiac muscle.

  2. Blood flow
    • Rationale:

      While blood is pumped through the heart, this flow is not the conduit for the pumping action of the cardiac muscle.

  3. Electrical impulses
    • Rationale:

      Electrical impulses are responsible for the pumping action of the heart. These impulses play a role in both the heart rate and rhythm needed to sustain life.

  4. Skeletal muscle movement
    • Rationale:

      While the heart is protected by the ribs, skeletal muscle movement is not the conduit for the pumping action of the cardiac muscle.

Overview

The heart lies between the right and the left lungs. It is, essentially, just left of the center of the chest and is protected by the rib cage.

Explanation

Learning Outcomes

The heart is an involuntary muscle. It contracts and relaxes in order to pump and send blood throughout the body. The pumping action of the heart is electrical impulses that are conducted within the cardiac muscle.

Test Taking Tip

Consider the structure and function of the cardiac muscle when determining the correct choice for this question.

Video Rationale