Question

Adrenal medulla secretes two hormones called adrenaline or epinephrine and noradrenaline or norepinephrine (also called emergency hormones).

Both the hormones -

Cause pupillary dilation (not constriction)

Stimulate breakdown of glycogen resulting in increased concentration of glucose in blood i.e., cause hyperglycemia.

Cause piloerection (raising of hair).

Increase strength of heart contraction i.e., heartbeat.