Download App

Human Reproduction — Bio Zoology STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12Bio ZoologyHuman Reproduction3 Marks
Question
Define lactation and explain its hormonal background.
✓

Answer

Lactation is the production of milk by mammary glands. The mammary glands show changes during every menstrual cycle, during pregnancy and lactation. Increased level of oestrogens, progesterone and human Placental Lactogen (hPL) towards the end of pregnancy stimulate the hypothalamus towards prolactin-releasing factors. The anterior pituitary responds by secreting prolactin which plays a major role in lactogenesis.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[ 3 Marks Questions ]" from Human Reproduction→Human Reproduction — all question types→Bio Zoology STD 12 question papers→Tamilnadu Board STD 12 question papers→Tamilnadu Board question paper generator→

Similar questions

Who was the first to discover the role of insulin against diabetes? From which organism does was insulin isolated?
→
Give an example for
  1. First generation vaccine
  2. Second generation vaccine
  3. Third generation vaccine
→
Under threat or attack, the garden lizard loses a part of its tail which trembles and avert the attention of predators, so that the lizard escapes later the tail regrown for the lizard. The same phenomenon can also be noticed in organisms like starfish etc. What do you call this phenomenon? Define it.
→
Define the terms
  1. guilds
  2. ecological equivalents
→
Suggest few ways to control water pollution.
→
Define temperature. How it impacts the life of an organism?
→
Explain the process of Ozone formation in atmosphere.
→
Give an account on Patau’s syndrome.
→
Biogenetic law is not universal – justify.
→
How radioactive wastes are generated?
→