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प्रश्न
Briefly explain the structure of thyroid gland.
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उत्तर
The thyroid gland is butterfly-shaped, bilobed situated below the larynx on each side of the upper trachea. The two lobes are connected by a median tissue mass called isthmus. Each lobe is made up of many lobules. The lobules consist of follicles called acini. Each acinus is lined with glandular, cuboidal, or squamous epithelial cells.
The lumen of acini is filled with colloid, a thick glycoprotein mixture consisting of thyroglobulin molecules. The thyroid gland secretes Tri-iodothyronine (T3) and tetra-iodothyronine (T4) or thyroxine hormones. These are concerned with metabolism.
Structure of Thyroid gland
संबंधित प्रश्न
Identify the ODD term in each set and name the CATEGORY to which the remaining three belong :
Example : glucose, starch, cellulose, calcium
Odd term : calcium
Category : others are different types of carbohydrates
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Islets of Langerhans are found in the brain.
Define the following:
Exocrine gland
Choose the correct answer:
Corpus luteum produces ____________
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| Gland/Organ | Hormone | Function |
| (i) Stomach | __________ | __________ |
| (ii) Parathyroid | __________ | __________ |
| (iii) __________ | __________ | Lowers blood sugar level. |
| (iv) Adrenal medulla | __________ | __________ |
| (v) Pancreas (Alpha cells) | __________ | __________ |
| (vi) Testes | __________ | __________ |
Given below is a table consisting of a set of items belonging to a common category. Complete the table by filling in the category and the odd one in the blanks
| Set | Category | Odd one |
| Adrenaline, Penicillin, Insulin, Thyroxin | __________ | __________ |
| Vasopressin, growth hormone, TSH, ACTH, FSH | __________ | __________ |
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Differentiate: Hormones and Enzyme.
Give the Technical Term: Name a hormone which controls developments of male secondary sexual characters.
Given alongside are the diagrammatic sketches of some endocrine glands. Observe the figures and answer the following questions:
(i) Label the parts numbered 1 to 5.
(ii) Name the hormones secreted by (2) and (5).
(iii) Which chemicals in our body are greatly affected by hormones?
(iv) What is the chemical nature of hormones?
(v) Name the elements related to the functioning of hormones secreted by the structure (2) and (5).
State the Function
Oxytocin
Choose the Odd One Out
Which organ acts a temporary endocrine gland in females?
which of the given option shows all wrong statements for thyroid gland
Statements
- It inhibits process of RBC formation
- It helps in maintenance of water and electrolytes
- Its more secretion can reduce blood pressure
- It Stimulates osteoblast
Growth hormone is important for normal growth. Justify the statement.
Comment on the functions of adrenalin.
Write a detailed account of gastro intestinal tract hormones.
In humans, the life processes are controlled and regulated by ____________.
Which endocrine gland is present in males but not in females?
Which of the following is not an endocrine gland?
