How is homeostasis achieved? (1 point)
Responses
Cells secrete stomach enzymes.
Cells control voluntary movements.
Cells control involuntary movements.
Cells maintain internal stability.
Cells maintain internal stability.
Cells maintain internal stability.
The correct response is: Cells maintain internal stability.
Explanation:
Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in the external environment. It is crucial for the proper functioning of cells and the overall health of an organism. Here's how cells achieve homeostasis:
1. Sensing: Cells have specialized receptors that detect changes in the internal environment. For example, temperature-sensitive receptors in our skin detect changes in body temperature.
2. Integration: Once the changes are detected, the information is transmitted to the control center, which is often the brain or specialized organs in the body. The control center processes the information and sends signals to effectors.
3. Response: Effectors, such as muscles or glands, respond to the signals from the control center to restore balance. For example, if body temperature deviates from the set point, effectors like sweat glands or blood vessels will be activated to cool down or warm up the body.
4. Feedback: To fine-tune the response, feedback mechanisms are in place. There are two types of feedback:
a) Negative feedback: This is the most common type of feedback in homeostasis. It works by reversing the initial change and bringing the body back to its set point. For example, when blood glucose levels rise, insulin is released to bring them back to normal.
b) Positive feedback: This type of feedback amplifies the initial change and pushes the body further from its set point. However, it usually occurs in specific situations, such as childbirth or blood clotting, and is not involved in maintaining overall stability.
Collectively, these mechanisms allow cells to maintain a stable internal environment, ensuring proper functioning and survival.