The main function of $nor-adrenaline$ is:

The disease characterized by extreme muscular weakness and brownish pigmentation of the buccal cavity and skin is:

Cushing's syndrome,which is characterized by the wasting of limb muscles and the accumulation of fat in the trunk region,is due to the hypersecretion of:

Which hormone stimulates the heartbeat?

$A$ patient who excretes a large quantity of sodium in urine has:

The adrenal cortex secretes small amounts of androgens. Which of the following is an androgen secreted by the adrenal cortex?