2. Removing a phosphate group from an ATP molecule, the other processors will need energy
Insulin receptors regulate glucose level in blood. Without that, glucose level would uncontrolled (not normal) (high and low) and it would be impossible to maintain homeostasis. I Hope I Helped You Good Luck.
Protein channels + no energy spent + following concentration gradient = passive transport via facilitated diffusion :)
They both tried to explain evolution, but Darwin was able to support it with evidence.
Hope this helps!