The hormone responsible for the sodium metabolism is

  • A

    Aldosterone

  • B

    $ACTH$

  • C

    Vasopressin

  • D

    None of above

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What is cause of adison's disease ?

When a normal heart is injected with physiological concentration of adrenalin, it shows

  • [AIIMS 1983]

$I.$ The adrenal cortex secretes many hormones called corticoids     $II.$ Corticoids involved in carbohydrate metabolism are called glucocorticoids      $III.$ Cortisol is main glucocorticoids   $IV.$ Aldosterone is the main mineralocorticoids

Select the correct combination from the given options

Norepinephrine

$(i)$ is released by sympathetic fibers

$(ii)$ is released by parasympathetic fibers

$(iii)$ increases the heart rate

$(iv)$ decreases blood pressure.

Which of the above statements are correct ?

  • [NEET 2013]

When the normal heart of a man is injected with physiological concentration of adrenaline it shows