Pregunta
Question 15 (1 point)
The cardiac cycle is defined as which of these?
A) left ventricular relaxation through right ventricular relaxation
B) ventricular contraction through atrial relaxation
C) atrial contraction until ventricular contraction
D) contraction of the atria until ventricular relaxation
The cardiac cycle is defined as which of these?
A) left ventricular relaxation through right ventricular relaxation
B) ventricular contraction through atrial relaxation
C) atrial contraction until ventricular contraction
D) contraction of the atria until ventricular relaxation
Ask by Frazier Ellis. in the United States
Mar 30,2025
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C) atrial contraction until ventricular contraction
Solución
We need to understand the cardiac cycle, which involves the sequence of events in the heart during one complete heartbeat. The cycle includes phases of contraction (systole) and relaxation (diastole) of the heart chambers.
- A) Left ventricular relaxation through right ventricular relaxation: This option does not encompass the entire cycle, as it focuses only on the relaxation phase.
- B) Ventricular contraction through atrial relaxation: This option is partially correct but does not fully describe the cycle.
- C) Atrial contraction until ventricular contraction: This option describes the sequence of atrial contraction leading to ventricular contraction, which is part of the cycle.
- D) Contraction of the atria until ventricular relaxation: This option describes the contraction phase but does not include the complete cycle.
The best option that describes the cardiac cycle is C) atrial contraction until ventricular contraction, as it captures the essential phases of the cycle.
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Simplifique esta solución The Deep Dive
The cardiac cycle is a fascinating and intricate sequence of events that ensures blood keeps flowing throughout the body like a well-choreographed dance! It encompasses the phases of both contraction and relaxation in the heart’s chambers, starting with atrial contraction and culminating in ventricular relaxation. Picture this: your heart is like a tireless conductor, synchronizing the music of life!
In real-world terms, understanding the cardiac cycle is crucial for medical professionals. It helps in diagnosing heart conditions and determining the effectiveness of treatments. For instance, when monitoring a patient’s heart rate or rhythm, it’s essential to know how well the cardiac cycle is functioning. A little rhythmic malfunction can lead to serious health issues – just like hitting a flat note in a song can ruin the whole performance!
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