Circulatory Systems Quiz
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5 questions, one answer each
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1. Which of the following describes a key function of valves in the circulatory system?
- A. They ensure one-way flow of blood through blood vessels
- B. They increase the speed of blood flow throughout the body
- C. They prevent blood from entering the heart
- D. They break down waste products in the blood
2. In a fish, blood passes through the heart once during each complete circulation. What is this type of circulation called?
- A. Double circulation
- B. Single circulation
- C. Pulmonary circulation
- D. Systemic circulation
3. In a mammal's double circulation, which statement is correct?
- A. Blood passes through the heart once per complete circuit
- B. Blood is pumped to the lungs and then to the body tissues, passing through the heart twice
- C. The pulmonary circulation delivers oxygenated blood directly to body cells
- D. The systemic circulation occurs before blood visits the lungs
4. Which of the following is an advantage of double circulation in mammals compared to single circulation in fish?
- A. It requires fewer blood vessels
- B. It allows blood to be pumped at higher pressure to body tissues after oxygenation
- C. It reduces the workload on the heart
- D. It prevents the need for valves in blood vessels
5. A student compares the circulatory systems of a fish and a mammal. Which statement best explains why a mammal's double circulation is more advantageous for maintaining high metabolic rates?
- A. It uses more blood vessels, so more oxygen is transported
- B. It allows oxygenated blood to be delivered at high pressure to body tissues, meeting the increased oxygen demands of active mammals
- C. It eliminates the need for valves, improving blood flow efficiency
- D. It means blood only needs to be filtered once, conserving energy