Biology questions
20584 published questions with worked solutions.
- There is complete separation of oxygenated and deoxygenated blood in the mammalian heart due to presence of
- During ventricular systole,
- Heart beats are accelerated by
- Heart beats are controlled by tissue which is composed of
- Adrenaline directly affects
- Parasympathetic nervous system
- In the conducting system of cardiac activity, the components of conducting system are connected as
- During joint diastole,
- The cardiac cycle starts with
- The left ventricle of human heart has its wall more thicker than the right ventricle because
- Systole refers to the contraction of
- Impulse is initiated in which chamber of the heart?
- When the S.A. node is stimulated, the chambers of the heart which contract are the
- White fibrous threads which extend from the papillary muscles and prevent the back flow of blood is called
- The velocity of blood flow is minimum in
- Valves are found in veins to check the backflow of the blood flowing under
- When the blood flows from heart to rest of the organs and back to heart, it is referred as
- Which of the following statement is related to coronary circulation?
- If the number of heart beats is 60, then the cardiac output will be
- Cardiac output signifies