Advertisements
Advertisements
Question
The diagram given below represents an endocrine gland in the human body. Study the diagram and answer the following questions:
- Identify the endocrine gland. Where is it located?
- Why is the above gland referred to as the ‘Master gland’?
- Name the hormone which in deficiency causes Diabetes Insipidus. How does this disorder differ from Diabetes Mellitus?
- Explain the term ‘Hormone’. What is the role of Tropic hormones in the human body?
- Which lobe of the above gland secretes:
- Oxytocin
- ACTH
- Growth hormone
Advertisements
Solution
(i) The endocrine gland represented is the pituitary gland. It is located at the base of the brain, attached to the hypothalamus.
(ii) The pituitary gland is referred to as the ‘Master gland’ because it secretes hormones that regulate and control the activity of other endocrine glands in the body.
(iii) Diabetes Insipidus is caused by the deficiency (hyposecretion) of the Antidiuretic Hormone (ADH), also known as vasopressin. This is secreted by the posterior pituitary.
Diabetes Insipidus differs from Diabetes Mellitus because Diabetes Mellitus is caused by a deficiency of insulin produced by the pancreas, whereas Diabetes Insipidus results from the inability of the kidneys to retain water due to a lack of ADH.
(iv) A hormone is a chemical substance secreted by an endocrine gland directly into the bloodstream that acts as a chemical messenger to regulate various physiological and metabolic activities.
The role of tropic hormones is hormones secreted by the pituitary gland that specifically stimulate and control the activity of other endocrine glands.
(v)
- Oxytocin: Secreted by the posterior lobe of the pituitary gland.
- ACTH (Adrenocorticotropic hormone): Secreted by the anterior lobe of the pituitary gland.
- Growth hormone: Secreted by the anterior lobe of the pituitary gland.
APPEARS IN
RELATED QUESTIONS
Mention which of the statements are true (T) and which are false (F). Give reason in support of your answer.
Gigantism and dwarfirm in humans basically depend on the qualtity and quantity of the food eaten during early growing age.
What is the hormone responsible for the secretion of milk in females after childbirth?
Select the mis-matched pair.
State whether true or false:
Pars distalis produces six trophic hormones.
Write the full form of LH.
Write the full for of ACTH.
Write the exact location of the following glands:
Pituitary
Name the following:
Six hormones secreted from anterior pituitary.
Name the following:
Abnormalities caused due to hypersecretion of growth hormone.
The diagram given alongside shows an endocrine gland in the human body. Study the diagram and answer the following questions:
 |
- Identify the gland. Write its specific location in the human body.
- Label the guidelines 1, 2 and 3 shown in the figure.
- Name any two secretions from part 1 and two from part 2.
- The deficiency of which hormone causes Diabetes insipidus? How is this condition different from Diabetes mellitus with respect to the abnormal substances present in the of urine.
