Friday, April 21, 2017

Thilak Biology

  1. Scientific name of sensitive plant.Mimosa pudica is a creeping annual or perennial herb of the pea family Fabaceae often grown for its curiosity value: the compound leaves fold inward and droop when touched or shaken, defending themselves from harm, and re-open a few minutes later. Wikipedia
  2. Scientific nameMimosa pudica
    Conservation statusLeast Concern (Population stable) Encyclopedia of Life
    Did you knowThe plant's most fascinating feature is its fern-like leaves that close and fold up when touched. gardenguides.
  3.  Thigmotropism is a movement in which a plant moves or grows in response to touch or contact stimuli
  4. Glands secreting Growth hormone.

  5. pituitary gland
    Growth hormone is a 191-amino acid, single-chain polypeptide that is synthesized, stored, and secreted by somatotropic cells within the lateral wings of the anterior pituitary glandGH is a stress hormone that raises the concentration of glucose and free fatty acids.
Iodised salt (also spelled iodized salt) is table salt mixed with a minute amount of various salts of the element iodine. The ingestion of iodine prevents iodine deficiency. Worldwide, iodine deficiency affects about two billion people and is the leading preventable cause of intellectual and developmental disabilities.[1][2] Deficiency also causes thyroid gland problems, including "endemic goitre". In many countries, iodine deficiency is a major public health problem that can be cheaply addressed by purposely adding small amounts of iodine to the sodium chloride salt.

  • Forms of tropism include phototropism (response to light), geotropism (response to gravity), chemotropism (response to particular substances), hydrotropism (response to water), thigmotropism (response to mechanical stimulation), traumatotropism (response to wound lesion), and galvanotropism, or electrotropism (response 
  • chemotropism The growth or movement of a plant or plant part in response to a chemical stimulus. An example is the growth of a pollen tube down the style during fertilization in response to the presence of sugars in the style. "chemotropism."
  • phototropism
    1. the orientation of a plant or other organism in response to light, either towards the source of light ( positive phototropism ) or away from it ( negative phototropism ).
5 types of stimuli in plants.

  • Some receptors can detect several different stimuli but they are usually specialised to detect one type of stimulus:
    • light - photoreceptors in the eye.
    • sound - vibration receptors in the ears.
    • touch, pressure, pain and temperature - different receptors in the skin.

  • Thigmonasty or seismonasty is the nastic response of a plant or fungus to touch or vibration. Conspicuous examples ofthigmonasty include many species in the leguminous subfamily Mimosoideae, active carnivorous plants such as Dionaea and a wide range of pollination mechanisms.
  • The major glands that make up the human endocrine system include the:
    • hypothalamus.
    • pituitary gland.
    • thyroid.
    • parathyroids.
    • adrenal glands.
    • pineal body.
    • reproductive glands (which include the ovaries and testes)
    • pancreas.
    • ndocrine/Endocrine_Glands.php

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