Final answer:
The choices is an example of negative feedback altering homeostatic control is: A) Shivering in response to cold.
Step-by-step explanation:
Understanding homeostasis and how the body maintains its internal balance is crucial when examining negative feedback mechanisms. Negative feedback is a response that counteracts a change, helping to maintain equilibrium in a system. For example, when blood glucose levels rise after a meal, the body responds by releasing insulin, which helps to lower blood glucose levels, returning the system to its normal range. This type of regulatory mechanism can increase or decrease a stimulus but always acts to reverse the direction of the change.
In the context of the provided choices regarding responses to temperature and exercise, the clearest examples of negative feedback are shivering in response to cold and sweating in response to heat. Both actions act to counter the initial stimulus. Shivering generates heat to raise body temperature, while sweating cools the body down when it becomes too warm. Therefore, options A) Shivering in response to cold and B) Sweating in response to heat are direct examples of negative feedback operating to alter homeostatic control.