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homeostasis & the nervous system (the central nervous system…
homeostasis & the nervous system
homeostasis maintain a stable internal environment
3)homeostasis is all about the regulation of the conditions inside your body to maintain a stable interval environment in response to change in both internal and external conditions
4)when you have loads of automatic control system in your body that regulate your internal environment these includes both nervous and hormonal communication systems for example theres are control systems that maintain your body temperature your blood glucose level and your water content
2) this is really important because your cells need the right conditions in order to function properly including the right conditions for enzyme action
5) all your automatic control sysems are made up of three components which work together to maintain a steady condition cells called receptros coordination centres and effectors
1) the conditions inside your body need to be kept steadily even when the external environment change
nerves system detected and reacts and reacts to stimuli
2) a single celled organisms can just respond to its environment but the cells of multicellular organisms need to communicate with each other first
3) so a multicellular organisms evolved they developed nervous and hormonal communication system
1) organisms need to respond to stimulus in order to survive
the nervous system is made up of different parts
2)sensory neurones the neurone that carry information as electrical impulses from the receptors to the cns
3) motor neurones the neurones that carry electrical impulses from the cns to effectors
1) central nervous system is vertebrates this consists of th brain and spinal cord only in mammals the cns is connected to the body by sensory neurones and motor neurones
4) effectors all your muscles and glands which respond to nervous impulses
receptors and effectors can form pert of complex organs
3) receptors can form part of large complex organs the retain of the eye is covered in light receptor cells
4) effectors respond to nervous impulses and bring about a change
2) there are many different types of receptors such as taste receptors on the tongue and sound receptors in each ear
5) muscles and glands are known as effectors they respond in different ways muscles contract in response to a nervous impulse whereas glands secrete hormones
1)receptors are the cells that detect stimuli
the central nervous system coordinates the response
3) sensory neurones carry the information from the receptors to the cns
4) the cns decides what to do about it
2) the receptors in the birds eye are stimulated
5) the cns sends information to the muscles I the birds wings the effectors along the neurones
1) when out of the corner of its eye spots a cat skuling towards it this stimulus
6)the muscles contract and the bird flies away to safety.
synapses connect neurones
2) the nerve signal is transferred by chemicals which diffuses across the gap
3) these chemicals then set off a new electrical signals in the next neurone
1) the connection between two neurones is called a synapse