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Explain what positive feedback is
- Moving away from a target set point through amplification.
- sensor needs greater stimulus
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how do we maintain our enviornments
through homeostasis (the usage of positive and negative feedback loops)
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Explain what negative feedback is
- trying to stabalize toward a certain target set point going possibly above and below the target until it is reached
- stimulus, sensor, control center, effector, stimulus
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example of negative feedback
- temp regulation, glucose levels, etc.
- temp reg- glands open and sweat evaporates to take heat away to make temp drop but if it drops too far glands close and goosebumps pulls skin in.
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example of positive feedback
- in childbirth, a baby's head pushing on a mothers cervix causes contractions which pushes more pressure on the cervix causes more contractions and so on.
- or fruit ripening which releases a gas that causes other apples to ripen and then those apples release a gas to make more apples ripe and so on
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Receptor
sensor- detect changes in the body and sends signals to the control center (usually the brain)
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afferent pathway
signal traveling to the control center
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control center
receives signal and initiates adjustments
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efferent pathway
command from the control center
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effector
organ or system that receives or executes a command
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examples of homeostasis between two systems
Blood pressure needs 120/80- circulatory, muscular, endocrine, and urinary systems work together to maintain a normal level
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