Heart O Level Biology MCQ (Multiple Choice Questions) PDF Download

In transportation of mammals, median septum

1. allows exchange of blood between right and left atrium
2. allows exchange of blood between right and left ventricle
3. is a semi-permeable membrane
4. completely separates the right and left sides of the heart

Back flow of blood from right ventricle to right atrium is prevented through

1. semilunar valves
2. mitral valves
3. tricuspid valves
4. median septum

Blood in pulmonary arteries is at a lower pressure than blood in aorta allowing

1. tricuspid valve to shut
2. bicuspid valve to shut
3. gaseous exchange to effectively take place in lungs
4. semi lunar valves to prevent backflow of blood

Semilunar valves are present at the bases of

1. pulmonary artery only
2. aorta only
3. pulmonary veins
4. pulmonary artery and aorta

Tricuspid valve is found between

1. left atrium and right atrium
2. left atrium and right ventricle
3. right atrium and right ventricle
4. left atrium and left ventricle