Blood pressure in the mammalian aorta is maxi | vedclass

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(A) : The temporary rise in blood pressure during the contraction of the heart is called systolic pressure,and the temporary fall in blood pressure du

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systole of the left ventricle

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(A) : The temporary rise in blood pressure during the contraction of the heart is called systolic pressure,and the temporary fall in blood pressure during the relaxation of the heart is called diastolic pressure.Blood pressure is expressed as the ratio of the systolic pressure over the diastolic pressure.For a healthy resting adult person,the average systolic/diastolic pressures are $120/80 \ mmHg$.The aorta is directly supplied by the left ventricle; thus,the blood pressure in the aorta is highest during the systole of the left ventricle.During this phase,the left ventricle contracts and pushes blood into the aorta.

Blood pressure in the mammalian aorta is maximum during

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$A$: The cardiac impulse which originates from $SA$ node in mammalian heart cannot spread directly from atria to ventricles.
$R$: In mammalian heart there is no continuity between cardiac muscle fibres of atria and those of ventricles except $AV$ bundles.

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