Advertisements
Advertisements
प्रश्न
Answer the following:
Which part of heart is responsible for initating and maintaining its rhythmic activity?
उत्तर
SA node or Sino Atrial Node is responsible for rhythmic activity. The SA (sinoatrial) node sends an electrical signal to the upper chambers of the heart (atria). The signal then travels to the lower heart chambers (ventricles) through the AV (atrioventricular) node, which causes them to contract, or pump. The heart's pacemaker is known as the SA node.
APPEARS IN
संबंधित प्रश्न
Sino-atrial node is called the pacemaker of our heart. Why?
A patient’s chart reveals that he has a cardiac output of 7500 mL per minute and a stroke volume of 50 mL. What is his pulse rate (in beats/min)
At any given time there is more blood in the venous system than that of the arterial system. Which of the following features of the veins allows this?
Distinguish between mitral valve and semi lunar valve.
Right ventricular wall is thinner than the left ventricular wall. Why?
What are the heart sounds? When and how are these sounds produced?
Select the correct biological term.
Destroyed in the liver and spleen after circulating in the blood for four months.
Read the following statements and choose the correct option
Statement 1: Atria receive blood from all parts of the body which subsequently flows to ventricles.
Statement 2: Action potential generated at sino-atrial node passes from atria to ventricles.
Answer the following:
What is specific in the heart of crocodiles among reptilians?
In the diagrammatic presentation of heart given below, mark and label, SAN, AVN, AV bundles, bundle of His and Purkinje fibres.
