285962
Mark the incorrect statement regarding normal ECG.
1 Patient is connected to 3 electrical leads (one to each wrist and to the left ankle).
2 ' ' wave represents atrial repolarization.
3 marks the beginning of ventricular systole.
4 represents ventricular depolarization.
Explanation:
(b) ECG is the recording of electrical changes that accompany the cardiac cycle. Normal ECG is composed of P-wave, QRS-wave and T-wave. The -wave indicates atrial depolarization, which causes atrial systole. QRS-wave represents ventricular depolarization. The -wave represents repolarization of ventricles.
NCERT Page-286 / N-201
BODY FLUIDS and CIRCULATION(NCERT)
285963
Which have 4-chambered heart?
1 Reptiles
2 Amphibians
3 Crocodiles
4 Fishes
Explanation:
(b) Crocodiles have 4-chambered heart.
NCERT Page-282 / N-197
BODY FLUIDS and CIRCULATION(NCERT)
285964
Which one of the following is a matching pair?
1 Lub-Sharp closure of AV valves at the beginning of ventricular systole.
2 Dup-Sudden opening of semilunar valves at the beginning of ventricular diastole.
3 Pulsation of the radial artery-Valves in the blood vessels.
4 Purkinje fibres-Initiation of the heart beat,
Explanation:
(a) Lub is the first heart sound. It is associated with the closure of the tricuspid and bicuspid valves at the beginning of systole and opening of semilunar valves.
NCERT Page-285 / N-200
BODY FLUIDS and CIRCULATION(NCERT)
285965
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.
285962
Mark the incorrect statement regarding normal ECG.
1 Patient is connected to 3 electrical leads (one to each wrist and to the left ankle).
2 ' ' wave represents atrial repolarization.
3 marks the beginning of ventricular systole.
4 represents ventricular depolarization.
Explanation:
(b) ECG is the recording of electrical changes that accompany the cardiac cycle. Normal ECG is composed of P-wave, QRS-wave and T-wave. The -wave indicates atrial depolarization, which causes atrial systole. QRS-wave represents ventricular depolarization. The -wave represents repolarization of ventricles.
NCERT Page-286 / N-201
BODY FLUIDS and CIRCULATION(NCERT)
285963
Which have 4-chambered heart?
1 Reptiles
2 Amphibians
3 Crocodiles
4 Fishes
Explanation:
(b) Crocodiles have 4-chambered heart.
NCERT Page-282 / N-197
BODY FLUIDS and CIRCULATION(NCERT)
285964
Which one of the following is a matching pair?
1 Lub-Sharp closure of AV valves at the beginning of ventricular systole.
2 Dup-Sudden opening of semilunar valves at the beginning of ventricular diastole.
3 Pulsation of the radial artery-Valves in the blood vessels.
4 Purkinje fibres-Initiation of the heart beat,
Explanation:
(a) Lub is the first heart sound. It is associated with the closure of the tricuspid and bicuspid valves at the beginning of systole and opening of semilunar valves.
NCERT Page-285 / N-200
BODY FLUIDS and CIRCULATION(NCERT)
285965
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.
285962
Mark the incorrect statement regarding normal ECG.
1 Patient is connected to 3 electrical leads (one to each wrist and to the left ankle).
2 ' ' wave represents atrial repolarization.
3 marks the beginning of ventricular systole.
4 represents ventricular depolarization.
Explanation:
(b) ECG is the recording of electrical changes that accompany the cardiac cycle. Normal ECG is composed of P-wave, QRS-wave and T-wave. The -wave indicates atrial depolarization, which causes atrial systole. QRS-wave represents ventricular depolarization. The -wave represents repolarization of ventricles.
NCERT Page-286 / N-201
BODY FLUIDS and CIRCULATION(NCERT)
285963
Which have 4-chambered heart?
1 Reptiles
2 Amphibians
3 Crocodiles
4 Fishes
Explanation:
(b) Crocodiles have 4-chambered heart.
NCERT Page-282 / N-197
BODY FLUIDS and CIRCULATION(NCERT)
285964
Which one of the following is a matching pair?
1 Lub-Sharp closure of AV valves at the beginning of ventricular systole.
2 Dup-Sudden opening of semilunar valves at the beginning of ventricular diastole.
3 Pulsation of the radial artery-Valves in the blood vessels.
4 Purkinje fibres-Initiation of the heart beat,
Explanation:
(a) Lub is the first heart sound. It is associated with the closure of the tricuspid and bicuspid valves at the beginning of systole and opening of semilunar valves.
NCERT Page-285 / N-200
BODY FLUIDS and CIRCULATION(NCERT)
285965
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.
285962
Mark the incorrect statement regarding normal ECG.
1 Patient is connected to 3 electrical leads (one to each wrist and to the left ankle).
2 ' ' wave represents atrial repolarization.
3 marks the beginning of ventricular systole.
4 represents ventricular depolarization.
Explanation:
(b) ECG is the recording of electrical changes that accompany the cardiac cycle. Normal ECG is composed of P-wave, QRS-wave and T-wave. The -wave indicates atrial depolarization, which causes atrial systole. QRS-wave represents ventricular depolarization. The -wave represents repolarization of ventricles.
NCERT Page-286 / N-201
BODY FLUIDS and CIRCULATION(NCERT)
285963
Which have 4-chambered heart?
1 Reptiles
2 Amphibians
3 Crocodiles
4 Fishes
Explanation:
(b) Crocodiles have 4-chambered heart.
NCERT Page-282 / N-197
BODY FLUIDS and CIRCULATION(NCERT)
285964
Which one of the following is a matching pair?
1 Lub-Sharp closure of AV valves at the beginning of ventricular systole.
2 Dup-Sudden opening of semilunar valves at the beginning of ventricular diastole.
3 Pulsation of the radial artery-Valves in the blood vessels.
4 Purkinje fibres-Initiation of the heart beat,
Explanation:
(a) Lub is the first heart sound. It is associated with the closure of the tricuspid and bicuspid valves at the beginning of systole and opening of semilunar valves.
NCERT Page-285 / N-200
BODY FLUIDS and CIRCULATION(NCERT)
285965
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.
