Tricuspid and bicuspid valves are connected to the papillary muscles of the ventricles by
(A) Ligamentum arteriosum
(B) Columnae carneae
(C) Pectinate muscles
(D) Chordae tendinae

In the human heart, the I. left auricle has opeining of pulmonary veins and receives oxygenated blood from lungs. II. Right auricle opens into the right ventricle and the auriculoventricular aperture is guarded by a bicuspid valve. III. valves are attached to the wall of ventricles by means of chordae tendinae. IV. opening of left auricle into left ventricle is guarded by a tricuspid valve. Choose the correct answer.

Thread like tendons of papillary muscles inserted upon the A-V valves are :- (a.) Chordae tendinae (b.)Yellow elastin fibres (c.) Reticulate fibres (d.) Collagen fibres

Which points are correct for cardiac muscles of (A) They are striated (B) They are unbranched (C ) They are involuntary (D) Intercalacted disc are present

Which of the following muscle act involuntarily? (a) Striated muscle (b) Smooth muscle (c) Cardiac muscle (d) Skeletal muscle

Cardiac muscles are (a) striated (b) nonstriated (c) voluntary (d) involuntary

Which is correct about joint diastole? a. Bicuspid and tricuspid valves are open b. Bicuspid and tricuspid valves are closed c. Semilunar valves are open d. Semilunar valves are closed

What will happen during the ventricular systole? a. Bicuspid and tricuspid valves are open b. Bicuspid and tricuspid valves are closed (c ). Semilunar valves are open d. Semilunar valves are close

In the human heart, backward flow of oxygenated blood is prevented by (A) Bicuspid valve and tricuspid valve (B) Tricuspid valve and semilunar valves (C) Bicuspid valve and semilunar valves (D) Semilunar valves and eustachian valve

In structure cardiac muscles are similar as voluntary muscles and in function similar as involuntary muscles. (A) Skeletal muscles and cardiac muscles (B) Cardiac muscles and smooth muscles (C) Smooth muscles and skeletal muscles (D) Only the cardiac muscles