Both plants, animals and other living organisms respond to changes in the environment in a different manner. These detectable changes are called the stimuli, which include light, cold, heat, smell, sound, touch etc.
Control and Coordination in animals
Control and Coordination in animals are conveyed with the help of two main systems.
- Nervous system
It is the network of nerve cells and fibers which transfers information via electrical impulses from one part of the body to other parts of the body. The structural and functional unit of the nervous system is the neuron and it includes:
- Central Nervous system: It includes the brain and the spinal cord.
- Peripheral Nervous system: It includes nerves and the ganglia.
- Endocrine system
It is a series of endocrine glands and the hormones. The endocrine glands are the ductless glands which secrete the hormones directly into the bloodstream.
Hormones are the chemical messengers mainly composed of protein which assist the nervous system in control and coordination. The pituitary gland, Thyroid Gland, Adrenal gland Pancreas, Testis, and Ovary are the different glands of the Endocrine system
Control and Coordination in Plants
In plants, the control and coordination are conveyed with the help of plant hormones.
Plant hormones are the organic molecules that affect the physiology of plants and play a major role in the growth and development of the plant cells and tissues. It is also called as the plant growth regulators. The five major types of plant hormones are Auxin, Gibberellin, Cytokinin, Ethylene and Abscisic acid.
Few Important Questions
- What are hormones?
- What is reflex action?
- What is the role of the central nervous system in control and coordination?
- What are plant hormones? Explain its types, functions with its examples.
- List out the functions of Hormones secreted by the Endocrine glands and Exocrine glands.
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