4 time interval between onset of ventricular contraction.
Explanation:
(a) In ECG, P-R interval corresponds to the time delay in AV node.
NCERT Page-286 / N-201
Body fluids and circulation
278333
In which of the following options the types of heart is correctly matched to their respective group of animals?
1 Two chambered heart- Fishes and amphibians
2 Three chambered heart-Amphibians and birds
3 Four chambered heart- Birds and mammals
4 Three chambered heart-Reptiles and mammals
Explanation:
(c) Fishes have two-chambered hearts. Amphibians and reptiles have three chambered hearts. Birds and mammals have four chambered hearts.
NCERT Page-282 / N-197
Body fluids and circulation
278334
Heart is covered by
1 peritoneum
2 pericardium
3 pleural membrane
4 visceral membrane
Explanation:
(c) Heart wall is formed of three layers: endocardium, myocardium and pericardium.
NCERT Page-282/N-197
Body fluids and circulation
278335
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
278336
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.
4 time interval between onset of ventricular contraction.
Explanation:
(a) In ECG, P-R interval corresponds to the time delay in AV node.
NCERT Page-286 / N-201
Body fluids and circulation
278333
In which of the following options the types of heart is correctly matched to their respective group of animals?
1 Two chambered heart- Fishes and amphibians
2 Three chambered heart-Amphibians and birds
3 Four chambered heart- Birds and mammals
4 Three chambered heart-Reptiles and mammals
Explanation:
(c) Fishes have two-chambered hearts. Amphibians and reptiles have three chambered hearts. Birds and mammals have four chambered hearts.
NCERT Page-282 / N-197
Body fluids and circulation
278334
Heart is covered by
1 peritoneum
2 pericardium
3 pleural membrane
4 visceral membrane
Explanation:
(c) Heart wall is formed of three layers: endocardium, myocardium and pericardium.
NCERT Page-282/N-197
Body fluids and circulation
278335
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
278336
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.
4 time interval between onset of ventricular contraction.
Explanation:
(a) In ECG, P-R interval corresponds to the time delay in AV node.
NCERT Page-286 / N-201
Body fluids and circulation
278333
In which of the following options the types of heart is correctly matched to their respective group of animals?
1 Two chambered heart- Fishes and amphibians
2 Three chambered heart-Amphibians and birds
3 Four chambered heart- Birds and mammals
4 Three chambered heart-Reptiles and mammals
Explanation:
(c) Fishes have two-chambered hearts. Amphibians and reptiles have three chambered hearts. Birds and mammals have four chambered hearts.
NCERT Page-282 / N-197
Body fluids and circulation
278334
Heart is covered by
1 peritoneum
2 pericardium
3 pleural membrane
4 visceral membrane
Explanation:
(c) Heart wall is formed of three layers: endocardium, myocardium and pericardium.
NCERT Page-282/N-197
Body fluids and circulation
278335
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
278336
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.
4 time interval between onset of ventricular contraction.
Explanation:
(a) In ECG, P-R interval corresponds to the time delay in AV node.
NCERT Page-286 / N-201
Body fluids and circulation
278333
In which of the following options the types of heart is correctly matched to their respective group of animals?
1 Two chambered heart- Fishes and amphibians
2 Three chambered heart-Amphibians and birds
3 Four chambered heart- Birds and mammals
4 Three chambered heart-Reptiles and mammals
Explanation:
(c) Fishes have two-chambered hearts. Amphibians and reptiles have three chambered hearts. Birds and mammals have four chambered hearts.
NCERT Page-282 / N-197
Body fluids and circulation
278334
Heart is covered by
1 peritoneum
2 pericardium
3 pleural membrane
4 visceral membrane
Explanation:
(c) Heart wall is formed of three layers: endocardium, myocardium and pericardium.
NCERT Page-282/N-197
Body fluids and circulation
278335
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
278336
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.
4 time interval between onset of ventricular contraction.
Explanation:
(a) In ECG, P-R interval corresponds to the time delay in AV node.
NCERT Page-286 / N-201
Body fluids and circulation
278333
In which of the following options the types of heart is correctly matched to their respective group of animals?
1 Two chambered heart- Fishes and amphibians
2 Three chambered heart-Amphibians and birds
3 Four chambered heart- Birds and mammals
4 Three chambered heart-Reptiles and mammals
Explanation:
(c) Fishes have two-chambered hearts. Amphibians and reptiles have three chambered hearts. Birds and mammals have four chambered hearts.
NCERT Page-282 / N-197
Body fluids and circulation
278334
Heart is covered by
1 peritoneum
2 pericardium
3 pleural membrane
4 visceral membrane
Explanation:
(c) Heart wall is formed of three layers: endocardium, myocardium and pericardium.
NCERT Page-282/N-197
Body fluids and circulation
278335
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
278336
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.
