
Deficiency of a hormone increases $K^+$ ion and decreases $Na^+$ ions in blood is secreted by.
A. Zona Fasciculata
B. Zona glomerulosa
C. Zona reticulata
D. Zona Pellucida
Answer
515.1k+ views
Hint: Hormones which are responsible for the maintenance of ionic balance of the blood are called Mineralocorticoids. Such hormones are secreted by Adrenal gland cortex.
Complete Answer:
- Adrenal gland or the suprarenal gland has two parts. It has an outer cortex and inner medulla. Cortex is mesodermal in origin and is epithelial in tissue structure. Cortex is further divided into three layers. From outer to inner these layers are Zona Glomerulosa, Zona Fasciculata and Zona Reticulata.
- Zona Glomerulosa secretes Mineralocorticoids, Zona Fasciculata secrete Glucocorticoids and Zona reticulata secrete androgen. Adrenal Medulla is ectodermal in origin and is modified sympathetic ganglion. They secrete hormone Epinephrine (Adrenalin) and Nor-epinephrine ( Noradrenaline)
- Mineralocorticoids which are secreted by Zona Gomerulata are responsible for marinating the ionic balance of $Na^+$ and $K^+$ in the blood. Major mineralocorticoid is Aldosterone. Aldosterone acts on DCT and collects the duct of the nephron. It increases the $Na^+$ reabsorption and increases the $K^+$ secretion. It increases $K^+$ to be excreted through the urine and decreases $Na^+$ excretion in urine. Thus it causes an increase in $Na^+$ level in the blood and decrease in $K^+$ level in the blood.
Additional Information: Adrenal cortex secretion is under the control of ACTH hormone secreted by pituitary gland. But Aldosterone is not under the control of ACTH. It is activated by the RAAS mechanism of the kidney. The RAAS mechanism releases Angiotensin-II which stimulates the zona glomerulosa of the adrenal cortex to release aldosterone.
Thus the correct option is Option B- Zona Glomerulosa.
Note: Zona Pellucida is not concerned with the adrenal cortex. It is the non-cellular glycoprotein layer present on the secondary oocyte (Ovum/female gamete). While fertilization sperm has to break zona pellucida by secreting zona lysine from acrosome.
Complete Answer:
- Adrenal gland or the suprarenal gland has two parts. It has an outer cortex and inner medulla. Cortex is mesodermal in origin and is epithelial in tissue structure. Cortex is further divided into three layers. From outer to inner these layers are Zona Glomerulosa, Zona Fasciculata and Zona Reticulata.
- Zona Glomerulosa secretes Mineralocorticoids, Zona Fasciculata secrete Glucocorticoids and Zona reticulata secrete androgen. Adrenal Medulla is ectodermal in origin and is modified sympathetic ganglion. They secrete hormone Epinephrine (Adrenalin) and Nor-epinephrine ( Noradrenaline)
- Mineralocorticoids which are secreted by Zona Gomerulata are responsible for marinating the ionic balance of $Na^+$ and $K^+$ in the blood. Major mineralocorticoid is Aldosterone. Aldosterone acts on DCT and collects the duct of the nephron. It increases the $Na^+$ reabsorption and increases the $K^+$ secretion. It increases $K^+$ to be excreted through the urine and decreases $Na^+$ excretion in urine. Thus it causes an increase in $Na^+$ level in the blood and decrease in $K^+$ level in the blood.
Additional Information: Adrenal cortex secretion is under the control of ACTH hormone secreted by pituitary gland. But Aldosterone is not under the control of ACTH. It is activated by the RAAS mechanism of the kidney. The RAAS mechanism releases Angiotensin-II which stimulates the zona glomerulosa of the adrenal cortex to release aldosterone.
Thus the correct option is Option B- Zona Glomerulosa.
Note: Zona Pellucida is not concerned with the adrenal cortex. It is the non-cellular glycoprotein layer present on the secondary oocyte (Ovum/female gamete). While fertilization sperm has to break zona pellucida by secreting zona lysine from acrosome.
Recently Updated Pages
Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 12 English: Engaging Questions & Answers for Success

Trending doubts
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

Which are the Top 10 Largest Countries of the World?

Why is the cell called the structural and functional class 12 biology CBSE

a Tabulate the differences in the characteristics of class 12 chemistry CBSE

Draw a labelled sketch of the human eye class 12 physics CBSE

What are the major means of transport Explain each class 12 social science CBSE
