Feedback Mechanism
Feedback Mechanism
Our body works most efficiently when its internal environment kept constant. This means that factors such as temperature, water content, available energy, available oxygen and concentration of wastes in the blood are all controlled. The process of maintaining a constant internal environment is known as homeostasis. Homeostasis involves receptors that are sensitive to a particular stimulus, and effectors, muscles or glands that have an effect on the same stimulus.
This type of control is known as a feedback system.
To understand this, consider a reverse cycle air conditioner like as an example of a machine that maintains a constant environment. A sensor called a thermostat is set at a particular temperature range, such as 21 - 23 degree celsius. If the temperature of the room goes above 23 degree celsius, the air conditioner switches on and cools the room until the required temperature is reached. The sensor detects this and then the air conditioner switches off until it once more detects a rise in temperature. It the sensor detects a lower temperature than 21 degree celsius, the heating system turns on. The temperature in the room rises and the heater turns off once the set temperature range of 21 - 23 degree celsius is reached.
Our body responds to the environment in a similar way. When temperatures rise, the body reacts by sweating and dilating blood vessels in an attempt to cool a person down. When the temperature decreases, the body responds by contracting blood vessels, creating goosebumps and making the body and prevent heat loss. In this way, the body maintains its optimal temperatures.
Our body respond to ____________ temperature by contracting blood vessels, creating goosebumps and making the body and prevent heat loss | |||
| Right Option : B | |||
| View Explanation | |||
The feedback mechanism is triggered when the system undergoes a __________ | |||
| Right Option : D | |||
| View Explanation | |||
How does our body maintain the increase in temperature ? | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
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Yatharthi Sharma
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