Q38 / 157 · NTA Abhyas (NEET) 2020 · Zoology · Excretory Products and their Elimination

The correct order of response of organs for increasing blood pressure is

  • Correct answer
    A
    Kidney - Liver - Lungs - Adrenal gland - Kidney
  • B
    Kidney - Lungs - Liver - Adrenal gland - Kidney
  • C
    Kidney - Liver - Adrenal gland - Lungs - Kidney
  • D
    Kidney - Lungs - Adrenal gland - Liver - Kidney

Solution

In response to decrease in blood pressure or GFR, the kidneys release Renin. Renin acts on the liver and converts angiotensinogen into angiotensin I. In the lungs angiotensin I is converted to angiotensin II with the help of angiotensin converting enzyme. Angiotensin II is a vasoconstrictor and also stimulates the adrenal gland which releases aldosterone. Aldosterone acts on the kidneys and helps in absorption of sodium ions. Thus this mechanism increases blood pressure

Hence, the correct answer is option: 'A'.

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