Unit 9 Assignment 2 Chun Ho Yeung What Is Homeostasis?

Unit 9 Assignment 2 Chun Ho Yeung What is homeostasis? Homeostasis refers to maintaining the internal environment such as temperature, pH, blood pressure, blood sugar levels and fluid balance within a narrow range to ensure that cells can perform their best functions in an optimal environment, and to maintaining a constant relationship with the external environment. Although the external environment is changing, the human body can still maintain a stable internal environment and maintain the dynamic balance. This stability is beneficial to the normal function of cells, tissues, organs and systems in the body. Essentially, it helps to maintain the body fluid concentrations within a narrow range.

First, the cells, tissues, organs, and systems.
For example, changes in the environmental temperature could affect the body's temperature, causing the body temperature to increase or decrease. Then, for the eating, if you have high sugar in the diet that can cause the blood pressure levels to increase, while excessive exercise can cause the heart rate to increase. Emotional tension or stress may also cause effects on the body's intake system, affecting the balance of endocrine levels. The reason why the body composition needs to be restored to its original value is to maintain stability and balance within the body. This kind of self-regulation mechanism to restore the body is called "negative feedback". Negative feedback mechanisms control the various physiological parameters, such as high blood pressure levels. This level of stability is critical to the normal functioning of the body, as cells, tissues and organs require specific environments to function properly. For example, suppose a person participates in outdoor sports in the summer, resulting in an increase in body temperature. The body will lower body temperature through mechanisms such as sweating and blood vessel dilation, returning to the initial normal range. As another example, after a person eats and his blood sugar level rises, insulin is released to promote high blood pressure into the cells and bring the blood pressure back to the
First, when the blood sugar decreases, alpha cells in the islets of Langerhans begin to sense the drop in blood sugar levels. These cells also contain receptors that sense changes in blood sugar levels. Once alpha cells detect a drop in blood sugar levels, they release the hormone glucagon. Glucagon promotes the breakdown of glycogen in the liver, converting glycogen into glucose, which is then released into the blood. In this way, glucose levels in the blood begin to rise. Effector cells (hepatocytes), after being stimulated by glucagon, begin to break down the glycogen stored in them into glucose and release the glucose into the blood. In addition, muscle tissue and fat tissue are also affected. After receiving glucagon signals, they will reduce glucose uptake to leave more glucose for other important organs (such as the brain). Through these physiological processes, the body is able to effectively regulate blood sugar levels and return them to normal set values. This regulatory mechanism ensures that blood sugar fluctuates within an appropriate range and ensures that cells and tissues can obtain sufficient energy to maintain normal physiological functions. Hormones are a class of chemicals that use blood as a medium to regulate the body's physiological functions and metabolic activities by binding to specific receptors.