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What do cardiac glycosides do?

  1. Regulate the heartbeat

  2. Rid the body of excess water

  3. Strengthen the heartbeat

  4. Relieve nausea and vomiting

The correct answer is: Strengthen the heartbeat

Cardiac glycosides are a class of medications that are commonly used to strengthen the heartbeat. They work by increasing the force of the heart's contractions, which is beneficial for conditions such as heart failure and certain types of irregular heart rhythms. This helps improve the heart's efficiency in pumping blood throughout the body. Choices A, B, and D are not correct because cardiac glycosides do not regulate the heartbeat, rid the body of excess water, or relieve nausea and vomiting.