Pregunta
Which of the following factors assists in the return of venous blood to the heart?
- arterial dilation
- valves in the veins
- changing respiratory pressures
- compression of veins by muscular movements
1 and 2
1 and 2
Ask by Mcfarlane Wright. in the United States
Feb 11,2025
Solución de inteligencia artificial de Upstudy
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The factors that assist in the return of venous blood to the heart are valves in the veins, changing respiratory pressures, and compression of veins by muscular movements.
Solución
The correct answer is 2, 3, 4.
Explanation:
• Valves in the veins (2) prevent the backflow of blood, helping maintain a unidirectional flow toward the heart.
• Changing respiratory pressures (3) create a pressure gradient known as the “respiratory pump” that aids in returning blood to the heart during inspiration.
• Compression of veins by muscular movements (4) creates the “muscle pump” effect, which also propels blood upward to the heart.
• Valves in the veins (2) prevent the backflow of blood, helping maintain a unidirectional flow toward the heart.
• Changing respiratory pressures (3) create a pressure gradient known as the “respiratory pump” that aids in returning blood to the heart during inspiration.
• Compression of veins by muscular movements (4) creates the “muscle pump” effect, which also propels blood upward to the heart.
Arterial dilation (1) does not directly assist in the return of venous blood to the heart.
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Simplifique esta solución Bonus Knowledge
Did you know that the circulation of blood in our bodies operates like a finely-tuned machine? Valves in the veins play a crucial role by preventing backflow, ensuring that blood returns to the heart efficiently. Additionally, when we breathe in, the pressure in our chest cavity decreases, helping to draw blood back towards the heart. It’s amazing how our body optimally uses these mechanisms to keep the blood flowing!
Another interesting aspect is the importance of muscle movement. When we exercise, our muscles compress the veins, aiding venous return like a pump. This is why staying active is key for cardiovascular health! So, the combination of valves, respiratory pressures, and muscle compression work together to maintain our circulatory system’s function smoothly.
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