Blood clots can be stimulated when there is a certain injury. The process begins when flowing blood encounters certain substances in our skin or in blood vessel walls which means that there is an injury. Platelets get “activated” in our blood stick to the area and each other to cover the wound and prevent the blood from leaking out. When activated, chemicals are released to attract more platelets to make a tougher and durable clot (positive feedback mechanism). When the tissue heals, the tough fibrin dissolves and returns to your blood. On the other hand, regulation of the blood calcium level is an example of negative feedback mechanism. When calcium decreases, the parathyroid gland releases more parathyroid hormone which stimulates the release of small amounts of calcium into your bloodstream. In contrast, when blood calcium is too high, parathyroid hormone production is reduced.
REFERENCES
- Hoffman, M. (2011, January 27). Blood Clots. Retrieved September 15, 2022, from WebMD website: https://www.webmd.com/dvt/blood-clots
- rpcasas. (2022). Positive and Negative Feedback. Cerritos College. https://www.cerritos.edu/rpcasas/positive-and-negative-feedback.htm