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Question
What is adenohypophysis?
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Solution
- 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.
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RELATED QUESTIONS
Match the terms of column I with those of column II:
| Column I | Column II | ||
| (a) | Adenohypophysis | (i) | Thyroxine |
| (b) | Neurohypophysis | (ii) | TSH |
| (c) | Thyroid | (iii) | Oxytocin |
| (d) | Adrenaline | (iv) | Insulin |
| (e) | Islets of Langerhans | (v) | Epinephrine |
| (f) | Hypothalamus | (vi) | Growth hormone |
| (g) | Pituitary gland | (vii) | Pituitary gland |
Which disease is caused by hyper secretion of Glucocorticoids?
Describe any four hormones secreted by Adenohypophysis.
Select the mis-matched pair.
Name the only hormone secreted by pars intermedia of the pituitary gland.
Consider the statements given below:
- Micturition is carried out by a reflex.
- Glucose is actively reabsorbed in the PCT.
- ADH helps in H2O reabsorption, making the urine hypertonic.
Which of the above is/are incorrect statements?
Distinguish between long-day and short day plants.
Mention if the following statement is true (T) or false (F). If false, rewrite the correct word (not words) striking out the single wrong one.
Oversecretion of growth hormone in adult causes gigantism.
Write the full for of ACTH.
Identify the gland with the help of following clue:
The gland is located in mid-brain below the hypothalamus.
