Identify the correct sequence of the cardiac cycle.
(i) Blood through the pulmonary vein and vena cava enters in left and right atria respectively.
(ii) AVN generates action potential for the ventricles.
(iii) SAN bring about atrial systole .
(iv) Ventricular systole pushes blood away from the heart .

Which of the following events do not occur during joint diastole ? I. All 4 chambers of heart are in relaxed state II. Tricuspid and bicuspid valves open III. Action potential is conducted from SAN to AVN IV. Blood from the pulmonary veins and venae cavae flows into the left and right ventricles respectively through the left and right atria V. The semilunar valves are closed

Which of the following events do not occur during joint diastole ? (A) All four chamber of heart are in relaxed state (B) Atrial repolarization valve open (C ) Action potential is conducted from SAN to AVN (D) Blood from the pulmonary veins and vena cava flows into the left and right ventricles respectively through the left and right atria (E ) The semilunar valves are closed

Which of the following events do not occur during joint diastole ? (A) All four chamber of heart are in relaxed state (B) Atrial repolarization valve open (C ) Action potential is conducted from SAN to AVN (D) Blood from the pulmonary veins and vena cava flows into the left and right ventricles respectively through the left and right atria (E ) The semilunar valves are closed

How can you explain the following ? (i) Auricles have thinner walls than ventricles. (ii) Blood flows under pressure in the arteries. (iii) Heart has striped muscles unlike other viscera. (iv) There is a slight gap between auricular systole and ventricular systole.

Read the following statements carefully (i) In fishes, the heart pumps out deoxygenated blood which is oxygenated by the gills and supplied to the body parts from where deoxygenated blood is returned to the heart. (ii) The openings of the right and the left ventricle into pulmonary artery and aorta respectively are provided with the mitral valves. (iii) The nodal musculature has the ability to generate action potential without any external stimuli, i,e., it is autoexcitable. (iv) The T-wave of ECG represents depolarisation of the ventricles. Which of the above four statements are incorrect?

Identify the correct statements from the below about "Stethoscope". (i) Stethoscope helps to find the normal and abnormal heart beat sounds. (ii) It helps to diagnose kidney diseases. (iii) Stethoscopes are used to read blood glucose level. (iv) Stethoscope is a medical device used to hear the internal sounds of the human body.

Read the following statements and select the correct ones (i) Nodal tissue is specialised cardiac musculature in human heart which has the ability to generate action potential due to an external stimuli (ii) Position of SAN - right corner of right atrium (iii) Position of AVN - right corner of ventricle (iv) AV bundle continues from AVN (v) Purkinje fibres are modified cardiac muscle fibres that originate from the atrioventricular node and spread into the two ventricles.

Read the following statements and select the correct ones (i) Nodal tissue is specialised cardiac musculature in human heart which has the ability to generate action potential due to an external stimuli (ii) Position of SAN - right corner of right atrium (iii) Position of AVN - right corner of ventricle (iv) AV bundle continues from AVN (v) Purkinje fibres are modified cardiac muscle fibres that originate from the atrioventricular node and spread into the two ventricles.