Question

question 19 (1 point) the stimulus of a homeostatic mechanism integrates sensory input and sends signals to effectors. detects a change in a variable that is being regulated. can be a change in the external environment. directly changes the internal environment. previous page next page

Explanation:

In home - static mechanisms, a stimulus is a change in a variable being monitored. It is not about integrating sensory input (which is more of a function of a control center), detecting a change is the role of a receptor but the stimulus is the actual change itself, and it doesn't directly change the internal environment but triggers a response that can lead to changes.

Answer:

detects a change in a variable that is being monitored