The group that is not changed in an experiment is the control group, or control.
Answer:
Brain
Explanation:
A shock is a medical condition which is caused when the body has the less available substrates for the aerobic respiration and shift to anaerobic cellular respiration.The shock takes place in four-stage in which the second stage is the compensatory stage.
During the compensatory stage, the sympathetic nervous system gets activated to shift back the respiration from anaerobic respiration to aerobic respiration.
The sympathetic nervous system releases the epinephrine and nor-epinephrine which acts on the kidney to maintain blood pressure. During this process, the Brain is not affected by the shock condition.
Thus, Brain is correct.
D.All of these is the answer
