Place the sequence of events that occurs in response to a change in the internal environment in order, starting with the earliest event at the top. Instructions change occurs in the internal environment (stimulus) control center sends signals to effectors receptor transmits information about the status of the internal environment the information sent is compared to the set point by the control center effectors respond to directions to alter the internal environment
The Correct Answer and Explanation is:
The correct sequence of events that occurs in response to a change in the internal environment, starting with the earliest event at the top, is as follows:
- Change occurs in the internal environment (stimulus): A change, or stimulus, occurs in the internal environment, such as a fluctuation in temperature, blood sugar level, or blood pressure. This change is detected by receptors in the body.
- Receptor transmits information about the status of the internal environment: Receptors are specialized sensors located in various parts of the body that monitor the internal environment. They detect the change or stimulus and send this information to the control center.
- The information sent is compared to the set point by the control center: The control center, typically the brain or spinal cord, receives the information from the receptor. It then compares this data to the normal set point, which is the ideal or balanced condition for that particular parameter (e.g., body temperature, blood glucose level).
- Control center sends signals to effectors: If the comparison shows that the internal environment has deviated from the set point, the control center sends signals to effectors. These effectors are organs or tissues that can make changes to the body to bring the internal environment back to the set point.
- Effectors respond to directions to alter the internal environment: The effectors respond to the signals from the control center by carrying out actions to return the internal environment to balance. For example, if the body temperature is too high, effectors (like sweat glands) will work to cool the body down.
Explanation:
The process described is an example of homeostasis, the body’s mechanism for maintaining stable internal conditions despite external changes. Each part of the process ensures that any change in the internal environment is detected, processed, and corrected efficiently. For example, if your body’s temperature rises due to external heat, your skin receptors detect the rise in temperature, send the information to the brain (control center), which then signals effectors like sweat glands to cool you down. This continuous feedback loop helps to maintain optimal conditions for cellular function and overall health.
