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Comparison of Chemical and Nervous Co-ordination, if you walk outside on a…
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if you walk outside on a very sunny day, your pupils will constrict to protect your eye from taking in too much light and being damaged. Your body reacts to the stimulus (the light) to protect you.
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When you are in a room with little oxygen you will immediately open the window in order to breath in air . So here, the stimulus was the lack of oxygen and your body reacted in order to survive
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- Neurons are basic units of structure and function. In addition, neurological cells are also present which provide nutrition and protection to neurons.
- Acts very efficiently and quick
- Co-ordinates different parts of the body to work together
- Has more short-term effects
- Involves isensations that are transported via neurons in form of impulses
- Hormone producing cells and neuron sensory cells, release hormones and are units of structure and function
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- Co-ordinates different systems in the body to work together
- Has longer lasting effects
- Involves hormones transported in bloodstream in small quantities
Receptors are groups of specialised cells. They detect a change in the environment stimulus. In the nervous system this leads to an electrical impulse being made in response to the stimulus. Sense organs contain groups of receptors that respond to specific stimuli.
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- You are hungry so you eat some food
- A dog is hot so it begins to pant
- It starts raining so you take out an umbrella
The body can respond to external stimuli in many ways including sweating, shivering, goosebumps, feeling sleepy, feeling awake, or a fight or flight response
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