Select the correct option for catecholamines.

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(D) The adrenal medulla secretes two hormones called adrenaline (epinephrine) and noradrenaline (norepinephrine),which are collectively known as catec

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(D) The adrenal medulla secretes two hormones called adrenaline (epinephrine) and noradrenaline (norepinephrine),which are collectively known as catecholamines.These hormones are rapidly secreted in response to stress of any kind and during emergency situations and are called emergency hormones or hormones of Fight or Flight.Catecholamines increase the alertness,pupilary dilation,piloerection (raising of hairs),and sweating.They also increase the heartbeat,the strength of heart contraction,and the rate of respiration.Catecholamines also stimulate the breakdown of glycogen resulting in an increased concentration of glucose in the blood.In addition,they also stimulate the breakdown of lipids and proteins.

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