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.
Electric signals are converted into chemicals at the synapse between two neurons so they can easily cross the gap and transport the chemical messenger to the following neuron, where it is changed back into an electrical signal.
The involuntary actions to stimuli are known as reflex actions. They take place without the conscious brain regions being involved. Reflex acts are all automatic behaviours. The brain and spinal cord of the central nervous system are involved in the reflex activity. Alternatively, voluntary actions are those that are controlled by the cerebellum of the brain. …
What is the difference between a reflex action and walking? Read More »
So far, we have been talking about nervous tissue, and how it collects information, sends it around the body, processes information, makes decisions based on information, and conveys decisions to muscles for action. In other words, when the action or movement is to be performed, muscle tissue will do the final job. How do animal …
