Question

multiple choice question
the opening and closing of the heart valves is associated with

o changes in blood oxygenation
o stretch of tissue fibers in the pericardium
o changes in chamber pressure
o changes in blood composition

Explanation:

The heart valves open and close due to differences in pressure within the heart chambers. When the pressure in one chamber is higher than the adjacent chamber, the valve opens to allow blood flow. When the pressure differential reverses, the valve closes to prevent back - flow. Blood oxygenation, tissue fiber stretch in the pericardium, and blood composition do not directly cause valve opening and closing.

Answer:

C. changes in chamber pressure