What happens if the AV node fails?
Important Questions on Transportation in Plants and Circulation in Animals
Select the best option from the following statements:
(i) Frog is a poikilothermic
(ii) Frog does not have any coronary circulation
(iii) Heart is "myogenic" in nature
(iv) Heart is autoexcitable
(v) Pulmonary semilunar valve
Statement (S): The sinoatrial node is called 'Pace-maker'.
Reason (R): The sinoatrial node contains specialised cardiomyocytes and generates action potentials without any external stimuli.
The correct answer is
(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.
Represent the union of two sets by Venn diagram for each of the following.
is a prime number between and
is an odd number between and
Read the following statements and choose the correct option:.
(i) SA node is located at the right upper corner of right atrium.
(ii) Purkinje fibres are found in atria.
(iii) Pulse Pressure = Systolic BP - Diastolic BP.
(iv) AV node is located in left atrium.
(v) Lub sound produced during heartbeat is caused by ventricular systole.
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker has to be grafted in him.It will be grafted at which of the site?
Which labelled part represents the site for the generation of action potential in human heart?
Statement 1: The SA node acts as pacemaker.
Statement 2: The SA node is located in the wall of the right atrium near the interatrial septum.
Chloroplast: Photosynthesis:: Sino-auricular node: _____. (Contraction of heart/contraction of muscle)
