Question

Which of the following statements is correct?

• A. Catecholamines stimulate the breakdown of glycogen resulting in an increased concentration of glucose in blood.
• B. Prolonged hypoglycemia results from a complex disorder called diabetes mellitus.
• C. The juxtaglomerular cells of the kidney produce a peptide hormone called renin, which stimulates erythropoiesis.
• D. The atrial wall of our heart secretes a hormone called atrial natriuretic factor (ANF), which causes the constriction of blood vessels.

Answer 1

The correct option is A Catecholamines stimulate the breakdown of glycogen resulting in an increased concentration of glucose in blood.

The adrenal medulla secretes two catecholamine hormones called adrenaline or epinephrine and noradrenaline or norepinephrine. They are rapidly secreted during emergency situations and hence are called emergency hormones. Catecholamines, among other things, stimulate the breakdown of glycogen, which results in an increased concentration of glucose in blood.

Prolonged hyperglycemia (increased blood glucose levels), not hypoglycemia, results from a complex disorder called diabetes mellitus.

The juxtaglomerular cells of the kidney produce a protein hormone called erythropoietin, which stimulates erythropoiesis. Renin causes an increase in blood pressure.

The atrial wall of our heart secretes a hormone called atrial natriuretic factor (ANF). ANF causes the dilatation of the blood vessels (vasodilation), which results in a reduction in blood pressure.