An Example of a Properly Functioning Homeostatic Control System Is

Question

An example of a properly functioning homeostatic control system is seen when
A)the core body temperature of a runner rises gradually from 37°C to 45°C.
B)the kidneys excrete salt into the urine when dietary salt levels rise.
C)a blood cell shrinks when placed in a solution of salt and water.
D)the blood pressure increases in response to an increase in blood volume.
E)the level of glucose in the blood is abnormally high whether or not a meal has been eaten.

Accepted Answer

A properly functioning homeostatic control system is one that maintains a stable internal environment despite changes in the external environment. Option B is an example of this as the kidneys help regulate salt levels in the body by excreting excess salt in the urine. This helps maintain a stable salt balance in the body. Option A describes a situation where the homeostatic control system is not functioning properly as a core body temperature of 45°C is dangerously high and can lead to organ damage. Option C describes a process called osmosis, which is not a homeostatic control system. Option D describes a situation where the homeostatic control system is responding to a change in blood volume by increasing blood pressure, which is important but not the best example of a properly functioning control system. Option E describes a situation where the homeostatic control system is not functioning properly as the level of glucose in the blood should be maintained within a certain range, regardless of whether or not a meal has been eaten.