Tag: human heart
Questions Related to human heart
SA node is found in
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Lungs
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Brain
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Spleen
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Heart
- The SA node is the heart's natural pacemaker.
- The SA node is a muscular tissue where electrical impulses are generated for the rhythmic contractions of the heart.
Hence, option D is correct.
The pulmonary artery carries deoxygenated blood from the ........... to the lungs.
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Left ventricle
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Right ventricle
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Left auricle
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Right auricle
Pulmonary circulation carries blood to and from the lungs. They include the pulmonary artery (aorta) and its branches to the capillaries in the lungs, as well as the veins, that drain those capillaries. The pulmonary arteries carry blood low in oxygen from the right ventricle, while the pulmonary veins carry blood high in oxygen from the lungs into the left atrium. This circuit functions to eliminate carbon dioxide from the blood and replenish its supply of oxygen.
Heart beat in vertebrates is
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Neurogenic
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Myogenic
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Both of the above
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None of the above
Myogenic contraction refers to a contraction initiated by the myocyte cell itself.
The heart of a healthy man beats normally .................. per minute
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50 - 60 times
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70 - 80 times
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90 - 100 times
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None of the above
The sinoatrial node (SAN) can generate the maximum number of action potentials, i.e., 70 - 75 beats/min, and is responsible for initiating and maintaining the rhythmic contractile activity of the heart. Therefore, it is called as the pacemaker of the heart.
Purkinje fibres mainly helps in contraction of
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Right auricle
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Left ventricle
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Ventricles
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Aorta
The Purkinje fibers are specialised conducting fibres present in the inner ventricular walls of the heart. They help in the contraction of the ventricles and thus maintain the rhythmicity of the heart.
'Bundle of His' is group of
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Nerve fibres
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Ganglia
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Connective tissue
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Muscle fibres
The bundle of His is a group of muscle cells that transmits the electrical impulses from AV node to the ventricle wall via Purkinje fibres.
Which of the following statement is correct regarding humans?
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Arteries always carry oxygenated blood while veins always carry deoxygenated blood
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Arteries. are provided with valves while veins are devoid of valves
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Arteries always carry blood away from the heart, while veins always carry blood towards the heart
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Venous blood is returned to the left ventricle
Arteries carry blood oxygenated blood away from the heart. While the veins carry deoxygenated blood towards the heart.
Pulmonary artery drains the deoxygenated blood from
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Right atrium
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Right ventricle
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Left atrium
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Left ventricle
Arteries carry oxygenated blood away from the heart. Pulmonary artery carries the de-oxygenated blood from the right ventricle to the lungs for oxygenation.
Which of the following set is correct?
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Sebum - Analgesic
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Vitamin - Nicotine
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Corpus callosum - Graffian follicle
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Bundle of His - Purkinje fibre
The bundle of His is the upper end of the electrical path,which through the Purkinje fibres allows the electrical signal to activate the ventricles and thus to pump the blood.
The rate of heart beat Per minute is highest in case of
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Elephant
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Whale
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Man
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Mouse
Under the normal conditions heart rate has an inverse relation with the size of the animal.