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Explain what positive feedback is
- Moving away from a target set point through amplification.
- sensor needs greater stimulus
how do we maintain our enviornments
through homeostasis (the usage of positive and negative feedback loops)
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
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.
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
sensor- detect changes in the body and sends signals to the control center (usually the brain)
signal traveling to the control center
receives signal and initiates adjustments
command from the control center
organ or system that receives or executes a command
examples of homeostasis between two systems
Blood pressure needs 120/80- circulatory, muscular, endocrine, and urinary systems work together to maintain a normal level