A gash closes up and forms a scar but how does it know when to stop? How can, for example, a whole part of your liver be removed and it just grows back without filling your whole abdomen with liver tissue
In: 480
Without going into too much detail, our bodies have these things called negative and positive feedback loops. Essentially, when our body receives certain signals – these signals turn on certain responses in the body eg. eat too much sugar, insulin is made in order to lower our glucose levels. These signals keep coming until the body senses that it has lowered the glucose to an acceptable level and then the signals stop.
Once our body stops sending out these signals or our body reaches a certain point where these signals are no longer being produced, then the system stops and nothing else happens and that’s job done.
Edit: to make more clear:
Step 1: body needs more liver
Step 2: body says “we need more liver”
Step 3: part of body that makes liver says “okay boss, we’ll make more liver”
Step 4: body keeps making liver until boss says “okay we have enough liver”
Step 5: body stops saying “we need more liver”
Step 6: no more liver is made
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