Adrenergic Hormones and Receptors Quiz

Hormones and Receptors in the Adrenal Gland

• The adrenal medulla secretes epinephrine (also known as adrenaline) and norepinephrine (noradrenaline), which are crucial for the fight-or-flight response.

Vasoconstriction Mechanism

• Alpha-1 adrenergic receptors mediate vasoconstriction, leading to an increase in blood pressure by constricting blood vessels.

Cardiac Function

• Beta-1 adrenergic receptors are predominantly found in the heart and are responsible for increasing cardiac output through enhanced heart rate and contractility.

Respiratory Function

• Beta-2 adrenergic receptors facilitate bronchodilation, expanding airway passages to improve airflow, particularly important during stress or physical activity.

Urinary Control

• Alpha-1 adrenergic receptors also play a role in the gallbladder and urinary system, inhibiting urination by promoting contraction of the urinary sphincter.