285942
Nodal tissue/musculature in human heart has
1 the ability to generate action potential due to any external stimuli.
2 two patches, one in atrium and other in ventricle.
3 purkinje fibres throughout the ventricular musculature.
4 atrioventricular node, also called pacemaker.
Explanation:
(c) Nodal tissues are specialized cardiac musculature present in heart wall. This tissue has two patches-one present in the right upper corner of right atrium (SA node) and other is seen in the lower left corner of right atrium close to the atrio-ventricular septum (AV node). A set of specialized muscle strands which originates in the AV node and pass downwards in the interventricular septum is called Purkinje fibres.
NCERT Page-284 / N-199
BODY FLUIDS and CIRCULATION(NCERT)
285943
The pacemaker of the human heart is
1 SA node
2 tricuspid valve
3 AV node
4 SV node
Explanation:
(a) Sino-atrial node (SA node) initiates and maintains contraction of heart by generating action potentials (70-75/min). So it is called the pacemaker.
NCERT Page-284 / N-199
BODY FLUIDS and CIRCULATION(NCERT)
285944
Bundle of His is a network of]#
1 nerve fibres found throughout the heart
2 muscle fibres distributed throughout the heart walls
3 muscle fibres found only in the ventricle wall
4 nerve fibres distributed in ventricles
Explanation:
(c) The atrioventricular bundle ( $AV$ bundle), on entering the ventricles splits into right and left branches. These branches then enter the heart muscles. They branch extensively and are called Purkinje fibres. They conduct the cardiac impulse to the ventricular wall.
BODY FLUIDS and CIRCULATION(NCERT)
285945
Contraction of the ventricle in the heart begins by the command from
1 Purkinje fibres
2 chordae tendinae
3 AV node
4 SA node
Explanation:
(d) The SA node has the inherent power of generating a wave of contraction and controlling the heartbeat. Hence, it is known as the pacemaker.
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BODY FLUIDS and CIRCULATION(NCERT)
285942
Nodal tissue/musculature in human heart has
1 the ability to generate action potential due to any external stimuli.
2 two patches, one in atrium and other in ventricle.
3 purkinje fibres throughout the ventricular musculature.
4 atrioventricular node, also called pacemaker.
Explanation:
(c) Nodal tissues are specialized cardiac musculature present in heart wall. This tissue has two patches-one present in the right upper corner of right atrium (SA node) and other is seen in the lower left corner of right atrium close to the atrio-ventricular septum (AV node). A set of specialized muscle strands which originates in the AV node and pass downwards in the interventricular septum is called Purkinje fibres.
NCERT Page-284 / N-199
BODY FLUIDS and CIRCULATION(NCERT)
285943
The pacemaker of the human heart is
1 SA node
2 tricuspid valve
3 AV node
4 SV node
Explanation:
(a) Sino-atrial node (SA node) initiates and maintains contraction of heart by generating action potentials (70-75/min). So it is called the pacemaker.
NCERT Page-284 / N-199
BODY FLUIDS and CIRCULATION(NCERT)
285944
Bundle of His is a network of]#
1 nerve fibres found throughout the heart
2 muscle fibres distributed throughout the heart walls
3 muscle fibres found only in the ventricle wall
4 nerve fibres distributed in ventricles
Explanation:
(c) The atrioventricular bundle ( $AV$ bundle), on entering the ventricles splits into right and left branches. These branches then enter the heart muscles. They branch extensively and are called Purkinje fibres. They conduct the cardiac impulse to the ventricular wall.
BODY FLUIDS and CIRCULATION(NCERT)
285945
Contraction of the ventricle in the heart begins by the command from
1 Purkinje fibres
2 chordae tendinae
3 AV node
4 SA node
Explanation:
(d) The SA node has the inherent power of generating a wave of contraction and controlling the heartbeat. Hence, it is known as the pacemaker.
285942
Nodal tissue/musculature in human heart has
1 the ability to generate action potential due to any external stimuli.
2 two patches, one in atrium and other in ventricle.
3 purkinje fibres throughout the ventricular musculature.
4 atrioventricular node, also called pacemaker.
Explanation:
(c) Nodal tissues are specialized cardiac musculature present in heart wall. This tissue has two patches-one present in the right upper corner of right atrium (SA node) and other is seen in the lower left corner of right atrium close to the atrio-ventricular septum (AV node). A set of specialized muscle strands which originates in the AV node and pass downwards in the interventricular septum is called Purkinje fibres.
NCERT Page-284 / N-199
BODY FLUIDS and CIRCULATION(NCERT)
285943
The pacemaker of the human heart is
1 SA node
2 tricuspid valve
3 AV node
4 SV node
Explanation:
(a) Sino-atrial node (SA node) initiates and maintains contraction of heart by generating action potentials (70-75/min). So it is called the pacemaker.
NCERT Page-284 / N-199
BODY FLUIDS and CIRCULATION(NCERT)
285944
Bundle of His is a network of]#
1 nerve fibres found throughout the heart
2 muscle fibres distributed throughout the heart walls
3 muscle fibres found only in the ventricle wall
4 nerve fibres distributed in ventricles
Explanation:
(c) The atrioventricular bundle ( $AV$ bundle), on entering the ventricles splits into right and left branches. These branches then enter the heart muscles. They branch extensively and are called Purkinje fibres. They conduct the cardiac impulse to the ventricular wall.
BODY FLUIDS and CIRCULATION(NCERT)
285945
Contraction of the ventricle in the heart begins by the command from
1 Purkinje fibres
2 chordae tendinae
3 AV node
4 SA node
Explanation:
(d) The SA node has the inherent power of generating a wave of contraction and controlling the heartbeat. Hence, it is known as the pacemaker.
285942
Nodal tissue/musculature in human heart has
1 the ability to generate action potential due to any external stimuli.
2 two patches, one in atrium and other in ventricle.
3 purkinje fibres throughout the ventricular musculature.
4 atrioventricular node, also called pacemaker.
Explanation:
(c) Nodal tissues are specialized cardiac musculature present in heart wall. This tissue has two patches-one present in the right upper corner of right atrium (SA node) and other is seen in the lower left corner of right atrium close to the atrio-ventricular septum (AV node). A set of specialized muscle strands which originates in the AV node and pass downwards in the interventricular septum is called Purkinje fibres.
NCERT Page-284 / N-199
BODY FLUIDS and CIRCULATION(NCERT)
285943
The pacemaker of the human heart is
1 SA node
2 tricuspid valve
3 AV node
4 SV node
Explanation:
(a) Sino-atrial node (SA node) initiates and maintains contraction of heart by generating action potentials (70-75/min). So it is called the pacemaker.
NCERT Page-284 / N-199
BODY FLUIDS and CIRCULATION(NCERT)
285944
Bundle of His is a network of]#
1 nerve fibres found throughout the heart
2 muscle fibres distributed throughout the heart walls
3 muscle fibres found only in the ventricle wall
4 nerve fibres distributed in ventricles
Explanation:
(c) The atrioventricular bundle ( $AV$ bundle), on entering the ventricles splits into right and left branches. These branches then enter the heart muscles. They branch extensively and are called Purkinje fibres. They conduct the cardiac impulse to the ventricular wall.
BODY FLUIDS and CIRCULATION(NCERT)
285945
Contraction of the ventricle in the heart begins by the command from
1 Purkinje fibres
2 chordae tendinae
3 AV node
4 SA node
Explanation:
(d) The SA node has the inherent power of generating a wave of contraction and controlling the heartbeat. Hence, it is known as the pacemaker.