Which gland is stimulated by nicotine?

........ is the middle layer of the adrenal cortex.

Epinephrine is ...

Injury to the adrenal cortex is not likely to affect the secretion of which one of the following?

Select the correct option on the basis of the following sentences regarding a gland's functions:
$(I)$ Hormones increase alertness.
$(II)$ Hormones increase the heart beat.
$(III)$ Stimulate the breakdown of glycogen.
$(IV)$ Stimulate the breakdown of lipids and proteins.

Blood pressure is controlled by