Question

Mitral valve is also called
A. Tricuspid valve
B. Semilunar valve
C. Bicuspid valve
D. None of the above

Answer 1

Bicuspid and tricuspid valves are present between atria and ventricles and are known as atrioventricular valves. Papillary muscles project from the wall of ventricles connecting chordae tendineae to cusps of valves. Papillary muscles and chordae tendineae are called the subvalvular apparatus.

Complete answer: There are four valves present in a human heart are as follows:
a. Mitral valve
b. Tricuspid valve
c. Two semilunar valves
-The Mitral valve contains two leaflets and is present on the left side of the heart. It allows the flow of blood from the left atrium to the left ventricle. Because of the presence of two leaflets, it is called a bicuspid valve. Blood flow from the left atrium to the left ventricle through the mitral valve occurs because of the pressure gradient due to the relaxation of ventricles and contraction of atria. Pressure in atria increases and pressure in ventricles decreases. The Mitral annulus is a ring-like structure present around the mitral valve which prevents the backflow of blood by changing its size. Leaflets come closer during ventricular systole due to contraction of the annular ring.
-The tricuspid valve has three leaflets and is present between the right atrium and ventricle. It has the same function as that of the bicuspid valve to prevent the backflow of blood. The tricuspid valve has three chordae tendineae connecting the cusps to the papillary muscles. Blood flows through the pressure gradient.
-Semilunar valves are present at the function of the right ventricle and pulmonary artery and aorta and left ventricle. These valves mainly prevent blood from flowing back into the ventricles. The semilunar and AV valves work in contrast to each other. When AV valves close semilunar valves open because of which blood enters the aorta and pulmonary artery. This depends on the pressure gradient in the heart.
Hence, the correct answer is Option C.

Note: Atrio-ventricular valves are the valves that separate articles and ventricles. The bicuspid or mitral valve is present between the left side and the tricuspid is present on the right side of the heart. Both of these valves prevent the backflow of blood from the ventricles to the atrium. Blood flows from atria to ventricles during atrial systole as the pressure in atria increases and blood moves from high pressure to low pressure.