Class 10th जैव प्रक्रम/Life Processes | ह्रदय की कार्यविधि/Working Of Heart | रक्तचाप/Blood Pressure

Class 10th Reevaluation Process All Details

Class 10 Science| Chapter 6 Life Processes | Important Questions | Revision | Part-1

Class 10 Science| Chapter 6 Life Processes | Important Questions | Revision | Part-2

Structure Of Human Heart|Working Of Human Heart|Circulation In Human Heart|OMR|Quiz - 1|Arteries Vs Veins|Blood Pressure|Lymph|OMR|Quiz - 2|Summary

Blood pressure in Argentinosaurus. (a) If this long-necked, gigantic sauropod had a head height of 18 m and a heart height of 8.0 m, what (hydrostatic) gauge pressure in its blood was required at the heart such that the blood pressure at the brain was 80 torr (just enough to perfuse the brain with blood)? Assume the blood had a density of 1.06 xx 10 kg//m^(3) . (b) What was the blood pressure (in torr or mm Hg) at the feet?

At a given instant , the blood pressure in the heart is 1.60 xx 10^(4) Pa. If an artery in the brain is 0.45 m above the heart , what is the pressure in the artery ? Ignore any pressure changes due to blood flow ?

Giraffe bending to drink. In a giraffe with its head 1.8 m above its heart, and its heart 2.0 m above its feet, the (hydrostatic) gauge pressure in the blood at its heart is 250 torr. Assume that the giraffe stands upright and the blood density is 1.06 xx 10^(3) kg// m^(3) . In torr (or mm Hg), find the (gauge) blood pressure (a) at the brain (the pressure is enough to perfuse the brain with blood, to keep the giraffe from fainting) and (b) at the feet (the pressure must be countered by tight-fitting skin acting like a pressure stocking). (c) If the giraffe were to lower its head to drink from a pond without splaying its legs and moving slowly, what would be the increase in the blood pressure in the brain? (Such action would probably be lethal.)