Question
Adenohypophysis and neurohypophysis.
| Adenohypophysis | Neurohypophysis |
| 1. Adenohypophysis is the anterior lobe of pituitary. | 1. Neurohypophysis is the posterior lobe of pituitary. |
| 2. There is portal system between adenohypo-physis and hypothalamus which has blood sinusoids. | 2. There is axonal knobs and blood vessels that connect neurohypophysis and hypothalamus. |
| 3. Adenohypophysis forms 75% of pituitary. | 3. Neurohypophysis forms 25% of pituitary. |
| 4. Adenohypophysis has three parts, pars tuberalis, pars distalis and pars intermedia. | 4. Neurohypophysis has three parts, median eminence, infundibulum and pars nervosa |
| 5. Adenohypophysis has chromophil (acidophil and basophil) and chromophobe cells. | 5. Neurohypophysis has axonic fibres and pituicytes. |
| 6. Adenohypophysis secretes seven different hormones after receiving an appropriate message from hypothalamus through releasing factors. | 6. Neurohypophysis does not produce hormones on its own. It is a neurohaemal organ as it receives and stores two hormones from hypothalamus. |
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| Interactions | Species | |
| A | B | |
| 1. Neutralism – ………………….. | ||
| 2. Negative interactions ………………………… | ||
| 3. Positive interactions ……………………. | ||
| 4. Both positive and negative interactions ………………………….. | ||