Ok i have to write a power piont pls help me do this irs in edgunity for science
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Answer:
1)a thing or event that evokes a specific functional reaction in an organ or tissue.
2)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.
3)There are two types of stimuli that affect the body: external and internal. External stimuli are changes to conditions outside of the body, or in general, information from outside the body that our senses detect. For example, our bodies respond to changes in light and temperature and to sources of danger.
4)Human senses include sight, hearing, balance, taste, smell, and touch. Sensory organs such as the eyes contain cells called sensory receptors that respond to particular sensory stimuli. Sensory nerves carry nerve impulses from sensory receptors to the central nervous system.
chemoreceptors. stimulated by changes in the chemical concentration of substances.
pain receptors. stimulated by tissue damage.
thermoreceptors. stimulated by changes in temperature.
mechanoreceptors. stimulated by changes in pressure or movement.
photoreceptors. stimulated by light energy.
5) Neurons communicate through an electrochemical process. Sensory receptors interact with stimuli such as light, sound, temperature, and pain which is transformed into a code that is carried to the brain by a chain of neurons. Then systems of neurons in the brain interpret this information.Another role of the spinal cord is to relay information between the brain and the peripheral nervous system. Information, in the form of nerve impulses, reaches the spinal cord through sensory neurons of the PNS. These impulses are transmitted to the brain through the interneurons of the spinal cord.
6)An impulse that changes one neuron, changes the next. The impulse movement continues along the pathway in this way. When the impulse reaches the end of one neuron (the axon), the impulse reaches a synapse. A synapse is the space between neurons.