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Systole and Diastole Video Lecture - NEET
FAQs on Systole and Diastole Video Lecture - NEET
| 1. What is systole and diastole? |  |
Ans. Systole and diastole are two phases of the cardiac cycle. Systole refers to the contraction phase of the heart when it pumps blood into the arteries, while diastole is the relaxation phase when the heart fills with blood.
| 2. How do systole and diastole affect blood pressure? | |
Ans. Systole and diastole play a crucial role in determining blood pressure. During systole, when the heart contracts, blood is forced into the arteries, causing an increase in blood pressure. On the other hand, during diastole, when the heart relaxes, blood pressure decreases as the heart is filling with blood.
| 3. What happens to the heart valves during systole and diastole? | |
Ans. During systole, the heart valves, specifically the mitral and tricuspid valves, close to prevent blood from flowing back into the atria. At the same time, the aortic and pulmonary valves open to allow blood to be pumped out of the heart. During diastole, the aortic and pulmonary valves close, while the mitral and tricuspid valves open to allow blood to flow into the ventricles.
| 4. Can systole and diastole be affected by certain medical conditions? | |
Ans. Yes, certain medical conditions can affect systole and diastole. For example, conditions such as hypertension (high blood pressure) can disrupt the normal rhythm of systole and diastole, leading to an increased workload on the heart. Similarly, conditions like heart failure can affect the heart's ability to contract and relax properly during these phases.
| 5. How are systole and diastole measured? | |
Ans. Systole and diastole can be measured using a blood pressure cuff and a stethoscope. The systolic blood pressure is the higher number recorded when the heart is contracting (systole), and the diastolic blood pressure is the lower number recorded when the heart is relaxing (diastole). These measurements provide information about the pressure exerted on the arterial walls during different phases of the cardiac cycle.
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