Question

One of the disadvantage of negative feedback loop is lag caused because it can only be exerted after controlled variable has been disturbed. In order to minimize lag between a change in a controlled variable and the action of the effector, it is advantageous for the body to anticipate any likely change. Which one of the following physiological mechanism achieves this?

Select one:

a. Feedbackward control

b. Feedforward control

c. Positive feedback control

d. All of the above

e. None of the above

Answer 1

Homeostatic mechanism helps the body to remain in state of balance. This is achieved by positive and negative feedback mechanisms. Negative feedback mechanism play an important role in bringing back the body to its steady state. For example temperature regulation in the body is controlled by negative feedback mechanism. One of the disadvantage of negative feedback mechanism is the time taken or time delay by the the body to exert a specific action. This can be overcome by feed forward control. So, the answer for this question is option B.