Effector, control center, receptor, and feedback are all involved in maintaining homeostasis. Lack of change is NOT involved in maintaining homeostasis.<span />
I believe the answer is branch gap sorry if I’m wrong
Answer: normal
Explanation:
In experimental design, especially those involving drug treatment, specimens (e.g mice, rabbit etc) are drafted into several groups to study their degree of response to the particular drug being investigated.
Of all, a group of specimens named NORMAL is usually NOT exposed to treatment in order to
- allow objective comparison between scientific parameters before and after experiments
