To prevent an iodine shortage, it is advised to use iodized salt. Low iodine consumption will result in less thyroxine being released from the thyroid gland. This has an impact on protein, carbohydrate, and fat metabolism. As a result, if iodine consumption is reduced, a person may get goitre.
Chemical coordination takes place in animals with the help of chemical messengers called hormones.Chemicals called hormones are released by particular endocrine glands. Animal homeostasis, growth, and development are all governed by hormones.
To demonstrate hydrotropism in plants. Procedure : i. Plant a seedling in a soil-filled vessel. ii. Place a porous pot filled with water near the seedling. iii. Leave the set up for a few days. Observation : iv. On examining the roots, it is observed that the roots bend towards the source of water and …
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The hormones produced by plants at the tips of roots and shoots are known as auxins. Tendrils have auxins at their tips. Auxins are sensitive to touch, thus when tendrils are coiled around support, their growth is slowed. As a result, they shift to the opposite side of the tip in search of support, with …
How do auxins promote the growth of a tendril around a support? Read More »
The hormones responsible for the plant’s growth include auxins and gibberellins. Auxins control growth as well as the lengthening of cells in shoots. Stem elongation and germination are caused by the hormone gibberellin.
Movement of leaves of a sensitive plant Movement of a shoot towards light It does not depend on the direction of stimulus applied. Depends on the direction of stimulus applied. Nastic movement Tropic movement Touch is the stimulus Light is the stimulus caused by the rapid water loss from the swollen areas at the bases …
Plant hormones are chemical compounds that a plant produces at specific locations and distributes to other areas as needed. Plant hormones aid in coordinating growth, development, and environmental reactions. An example would be cytokines, abscisic acid, and ethylene.
Reflex actions are formed instantaneously in reaction to a stimulus that does not give the brain a chance to process it. For instance, the nerves that control the hand’s muscles are related to the sensory nerves that detect heat. A reflex arc is a relationship between recognising the nerve signal (input) and quickly reacting to it …
The nose is used to detect an agarbatti’s smell. The forebrain receives electrical impulses from the olfactory receptors found in the nose. The incense stick’s smell is interpreted by the forebrain as this signal.
The cerebellum, a region of the brain, is in charge of regulating motor activity. Hence, it is the body part involved in maintaining the body’s posture and equilibrium.
