Describe how negative feedback and positive feedback are involved in homeostatic regulation.

Select the 4 statements that correctly describe positive feedback pathways. A sensor/receptor is required to monitor and limit levels. A sensor/receptor is unnecessary to monitor and limit levels. Feedback prevents homeostasis. Feedback contributes to homeostasis. Feedback stimulates the effector to continue to do the same thing. Feedback stops the effector from doing one thing and stimulates it to do the opposite. When the target level for a hormone is reached, feedback results in a reduction of that hormone being released. When a target level for a hormone is reached, feedback results in an increase of that hormone being released.

Describe what is meant by a trade-off in physiologicalfunctions, and give an example.

A negative feedback system is one in which a variable is changed in the same direction as the original change that initiated the system the initiating variable is always reduced (made more negative) a variable is changed in the opposite direction to the original change that initiated the system two opposing variables are played against one other the initiating variable is always increased (made more positive)