Moderate

Which of the following activity is regulated by homeostasis?

Correct answer: D. All (A), (B) and (C)

  • A. Temperature
  • B. Water balance
  • C. Blood sugar level
  • D. All (A), (B) and (C)

Explanation

The control systems have been acquired for the variety of homeostatic regulations. These living control systems work exactly on the mechanism of physical control system. It has three components: receptor, control center and an effector. In a physical control system, e.g., temperature control system, there is a sensor (thermometer) that monitors temperature change from a set point and signals to the control center to take action by switching on heater or cooling units in response to drop or rise in the temperature compared to set point. Similar to it in living system, there is set point in temperature regulated (endothermic) animals. The receptors (sensor) detect temperature change, e.g., of increase and signal to control center for action of cooling systems and the vice versa. Detection of change and signalling for effector's response to control system is a feedback mechanism. In these processes there is an inverse effector's response to the change in external environment as there is generally cooling effector's response to warmth sensing in external environment, thus are termed as negative feedback.

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About Homeostasis

Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.

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