Putting adrenaline on the heart will cause the heart beat to

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?

Damage to the adrenal cortex will $NOT$ affect the secretion of which of the following?

The cause of Addison's disease is:

Which of the following hormones regulates the reabsorption of $Na^+$ ions?

Epinephrine and norepinephrine are both collectively known as: