STANDARD Zoology Circulatory System MCQ Question
Which one of the following is a matching pair
Lub - sharp closure of AV valves at the beginning of ventricular systole
Dub - sudden opening of semilunar valves at the beginning of ventricular diastole
Pulsation of the radial artery-valves in the blood vessels
Initiation of the heart beat Purkinje fibres
Correct Answer
Detailed Explanation
Lub is the first(S1) sound of heart. it is caused by turbulence caused by closure of mitral and tricuspid valve at the start of systole.
Found an issue with this question?
Related Questions
More from Animal Physiology
Role of the water vascular system in Echinoderms is: A. Respiration and Locomotion B. Excretion and Locomotion C. Capture and transport of food D....
In cockroach, excretion is brought about by- A. Phallic gland B. Urecose gland C. Nephrocytes D. Fat body E. Collateral glands Choose the correc...
Read the following statement having two blanks A and B. In cockroach, a ring of 6-8 blind tubules called (A) is present at the junction of foregut and...