Homeostasis

Receptor

Detects change and sends a message to the control center

Positive Feedback Loop Examples

Childbirth, healing a cut

Stimulus

the “cause” for something to happen

Process for healing a cut

When you get a cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop the bleeding. The hormone signals continue until the cut is closed.

Hormone

a chemical substance produced by a gland and carried by blood

What are released by the endocrine system

Hormones

Set point examples

Body temperature, Blood glucose, concentration, electrolyte concentration, pH levels, tendon tension, and variables

Effectors

responds to the output from the control center

Negative Feedback Loop Examples

Maintaining glucose levels, maintaining body temperature

Maintaining glucose levels process

When glucose levels in the blood rise, your brain sends a signal to your pancreas. The pancreas releases insulin, which opens channels in cell membranes to allow glucose to enter the cell, lowering blood sugar levels

Negative Feedback Loops

Prevent small changes from getting larger

Positive Feedback Loop

increases or speeds up original change

What is the point of a feedback loop

To make sure the conditions in the body remain stable

Homeostasis

The tendency of an organism to maintain a balanced state in order to stay healthy

Control Center

Recieves the message from the receptor and coordinates a response

Response

the “effect” of a given stimulus

What is the endocrine system

A group of glands that work together with the nervous system to coordinate all body functions