How is homeostasis achieved? (1 point)
COURSE TOOLS
• Cells control involuntary movements.
• Cells control voluntary movements.
• Cells secrete stomach enzymes.
• Cells maintain internal
conditions.
Homeostasis is achieved through cells maintaining internal conditions.
To understand how homeostasis is achieved, it is important to know that homeostasis refers to the body's ability to maintain stability and balance in its internal environment. This is accomplished through various mechanisms, including those performed by cells.
Cells contribute to homeostasis in several ways:
1. Cells regulate involuntary movements: Involuntary movements, such as heart contractions or breathing, are managed by cells in specialized tissues. For example, cardiac muscle cells regulate heart contractions, while respiratory muscle cells control breathing rate. These cells communicate and coordinate their activities to maintain a stable internal environment.
2. Cells regulate voluntary movements: Voluntary movements, such as walking or talking, are controlled by cells in the nervous system called neurons. Neurons transmit electrical signals that initiate and control muscle contractions, allowing us to move and perform different activities. This coordination between nerve cells and muscle cells is crucial for maintaining balance and stability.
3. Cells secrete stomach enzymes: In the case of digestion, cells in the stomach lining secrete enzymes to break down the food we consume. These enzymes aid in the digestion process, ensuring that nutrients are effectively extracted and absorbed by the body. By maintaining the correct balance of enzymes, cells contribute to the overall homeostasis of the digestive system.
4. Cells maintain internal conditions: Various cells throughout the body play a role in maintaining internal conditions. For example, liver cells help regulate blood glucose levels by storing excess glucose as glycogen or releasing stored glucose when needed. Similarly, kidney cells filter waste products from the bloodstream and maintain fluid balance by regulating water and electrolyte levels.
Overall, it is the coordinated efforts of cells throughout the body that enable the achievement of homeostasis. Each cell has specific functions and responsibilities that collectively contribute to maintaining a stable internal environment. By understanding how cells perform these functions, we can better appreciate the intricate mechanisms behind achieving homeostasis.