Zoology-Cardiac Cycle
NEET Zoology Cardiac Cycle MCQ Question
Type: MCQ-fact-Easy-Class 11
What causes the closure of the semilunar valves during the cardiac cycle?
A
Falling ventricular pressure
B
Increasing atrial pressure
C
Rising blood temperature
D
Decreasing oxygen levels
Correct Answer
Option A
Detailed Explanation
The closure of the semilunar valves occurs as the ventricular pressure falls, which prevents the backflow of blood into the ventricles.
Found an issue with this question?
Related Questions
More from
Which of the following statements about blood composition is correct?
Blood CompositionZoology
Which protein in blood plasma is primarily needed for the clotting or coagulation of blood?
Blood CompositionZoology
What percentage of blood is composed of formed elements such as erythrocytes, leucocytes, and platelets?
Blood CompositionZoology