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Transport in animals

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Question 14

The graph below shows the pressure changes in the left side of a human heart during a single cardiac cycle.

Pressure changes in the left side of the heart

Which of the following statements correctly identifies the event occurring at time t3t_3t3​?

The atrioventricular valve closes.

The semilunar valve opens.

The semilunar valve closes.

The atrioventricular valve opens.

Transport in animals Questions

  1. A Level
  2. /Biology
  3. /Transport in animals