Cardiac output depends on or is influenced by which of the following?

Question

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Cardiac output is influenced by heart rate (A) and stroke volume (C), which are its two primary components. The amount of adrenaline in the blood (B) can affect both heart rate and stroke volume, thereby influencing cardiac output. The amount of blood entering the heart (D), also known as preload, directly affects the stroke volume, thus influencing cardiac output.

Cardiac Output Depends on or Is Influenced by Which of the Following