Biology Topic Practice

Pacemakers & Artificial Hearts

When the natural rhythm or function of the heart fails, technology can intervene to save lives.

Where is the natural pacemaker located in the heart?

What is Pacemakers & Artificial Hearts?

"Pacemakers and artificial hearts are medical devices used to maintain or replace the function of a failing or irregular biological heart."

Question 1

Which answer best completes the statement? ____ tissue is made of hollow tubes that transport water

Question 2

A student thinks that stents are used to thin the blood. Why is this incorrect?

Question 3

Choose the correct option to complete the statement. Enzymes have an ____ that fits a specific substrate

Question 4

Which answer best completes the statement? Proteases break down proteins into ____

Cardiac Technology

Natural pacemaker: A group of cells in the right atrium that control the heart rate.

Artificial pacemaker: An electrical device used to correct irregularities in the heart rate.

Artificial hearts: Mechanical pumps used to keep blood circulating while a patient waits for a transplant.

Valve replacement: Using biological or mechanical valves to fix leaky hearts.

Exam Tip

Artificial hearts are usually a temporary measure until a donor heart becomes available.

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