Advertisements
Advertisements
प्रश्न
What is adenohypophysis?
Advertisements
उत्तर
- It is an outgrowth from the roof of the buccal cavity. This outgrowth is called Rathke’s pouch. It grows upwards towards the brain.
- It is the larger lobe of the pituitary gland. It is a highly cellular and vascular part of the pituitary gland. It contains various types of epitheloid secretory cells, acidophils, basophils, chromatophores.
- It is further divided into three parts - Pars distalis, pars tuberalis, and pars intermedia. Pars intermedia is poorly developed in human beings.
- It is a small reduced part lying in the cleft between the anterior and posterior lobe.
- It secretes Melanocyte Stimulating Hormone (MSH) in some lower vertebrates. MSH stimulates the dispersion of melanin granules in melanocytes and is responsible for skin pigmentation.
APPEARS IN
संबंधित प्रश्न
Give the Technical Term: Name the glands which secrete the following hormone: ACTH
Hyper secretion of growth hormone in childhood cause ______.
Continued secretion of milk is stimulated by
What is the role-played by luteinizing hormones in males and females respectively?
You have learnt that a characteristic feature of endocrine system is the presence of feed back loops. By this what is meant if hormone A stimulates gland ‘X’ to secrete hormone B, the production of ‘A’ could be modified when the level of B changes in our blood. An example is the relation between hormones LH and estrogen (E2). An old woman exhibits the following features. High levels of LH in blood but low levels of E2 in the blood. Another woman exhibits high level of LH in blood and also high level of E2 in the blood. Where is the defect in both these women? Provide suitable diagram to support this answer.
Illustrate the differences between the mechanism of action of a protein and a steroid hormone.
Spermatogenesis is induced by ______.
Hypersecretion of growth hormone causes ______.
Name the following:
Abnormalities caused due to hypersecretion of growth hormone.
Name the hormones responsible for the given functions.
| Functions | Hormones | |
| (a) | Contraction of uterine muscles during child birth | ______ |
| (b) | Maintenance of corpus luteum | ______ |
| (c) | Milk formation and secretion | ______ |
| (d) | Development of external sex characters in males. | ______ |
| (e) | Stimulation of sympathetic nervous system | ______ |
