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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
Define the following:
Hormone
| Hormones | Target gland |
| Thyrotrophin (TSH) | ______ |
| Hormones | Target gland |
| Corticotrophin (ACTH) | ______ |
add a note on deficiency of thyroxine.
A gland having endocrine as well as exocrine function is
Compare the hormonal response with the nervous response with respect to their speed, transmission and the general nature of changes brought about.
What are the general properties of hormones?
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 | __________ | __________ |
Complete the table given below by filling in the blanks numbered 1 to 8.
| Gland | Hormone Secreted | Effect on Body |
| 1 | 2 | Regulates basal metabolism |
| Pancreas (β-cells) | 3 | 4 |
| 5 | 6 | Increases heart beat |
| 7 | Thyroid stimulating hormone | 8 |
Fill in the Blanks:
The glands with ducts are called ______.
Place the words at the bottom of the page next to the number that shows the location of the Endocrine Glands.
(1) ________
(2) ________
(3) ________
(4) ________
(5) ________
(6) ________
(7) ________
(8) ________
(9) ________
Pancreas Hypothalamus Pituitary Parathyroid Ovaries Adrenal Thyroid Thymus Testes
State the Function
Oxytocin
Choose the Odd One Out
Choose the Odd One Out
Spermatogenesis in mammalian testes is controlled by ______.
Name the layers of adrenal cortex and mention their secretions.
Comment on the functions of adrenalin.
In humans, the life processes are controlled and regulated by ____________.
Label the endocrine glands in the given figure.
