A gland that secretes both hormone and enzyme is
A gland that secretes both hormone and enzyme is
The correct option is B pancreas
The correct option is B.
Explanation of the correct option:
- The pancreas is present in the duodenum of the stomach. It acts as both an exocrine gland and an endocrine gland.
- The pancreas acts as the exocrine gland to secrete digestive enzymes like lipase, amylase, trypsin, and ribonuclease from acinar cells of the pancreas into the duodenum through the pancreatic duct.
- The enzymes get activated in the digestive tract. In the digestive tract trypsin digests proteins, amylase digests carbohydrates and lipase digests fats.
- The pancreas contains specialized cells known as Islets of Langerhans. Each islet contains alpha cells and beta cells. Alpha cells secrete the hormone glucagon while beta cells secrete insulin directly into the bloodstream without any duct. The endocrine gland secretes hormones directly into the blood.
- High glucose levels in the bloodstream make the pancreas secrete insulin. The pancreas secretes glucagon during low levels of glucose in the bloodstream. The pancreas thus helps to maintain blood glucose levels.
Explanation of the incorrect option:
Option A:
The pituitary gland is the smallest endocrine gland that controls all other endocrine glands. Hence, it is known as the master gland.
Option C
The thyroid is the largest endocrine gland located on either side of the trachea. The thyroid gland secretes Thyroxin (T4), Triiodo-thyroxin (T3), and calcitonin hormones.
Option D:
An adrenal gland is located on the anterior part of each kidney and consists of tissues known as the adrenal cortex and adrenal medulla that secrete hormones like cortisol, aldosterone, androgen, epinephrine, and nor-epinephrine respectively.
Final answer: A gland that both hormone and enzyme is the pancreas.
pancreas
The correct option is B.
Explanation of the correct option:
- The pancreas is present in the duodenum of the stomach. It acts as both an exocrine gland and an endocrine gland.
- The pancreas acts as the exocrine gland to secrete digestive enzymes like lipase, amylase, trypsin, and ribonuclease from acinar cells of the pancreas into the duodenum through the pancreatic duct.
- The enzymes get activated in the digestive tract. In the digestive tract trypsin digests proteins, amylase digests carbohydrates and lipase digests fats.
- The pancreas contains specialized cells known as Islets of Langerhans. Each islet contains alpha cells and beta cells. Alpha cells secrete the hormone glucagon while beta cells secrete insulin directly into the bloodstream without any duct. The endocrine gland secretes hormones directly into the blood.
- High glucose levels in the bloodstream make the pancreas secrete insulin. The pancreas secretes glucagon during low levels of glucose in the bloodstream. The pancreas thus helps to maintain blood glucose levels.
Explanation of the incorrect option:
Option A:
The pituitary gland is the smallest endocrine gland that controls all other endocrine glands. Hence, it is known as the master gland.
Option C
The thyroid is the largest endocrine gland located on either side of the trachea. The thyroid gland secretes Thyroxin (T4), Triiodo-thyroxin (T3), and calcitonin hormones.
Option D:
An adrenal gland is located on the anterior part of each kidney and consists of tissues known as the adrenal cortex and adrenal medulla that secrete hormones like cortisol, aldosterone, androgen, epinephrine, and nor-epinephrine respectively.
Final answer: A gland that both hormone and enzyme is the pancreas.
