Answer:
In Pavlov's experiment the conditioned stimulus is a previously neutral stimulus (like the bell), that eventually elicits a conditioned response (drooling) after being repeatedly paired with the unconditioned stimulus (food).
Explanation:
The conditioned stimulus studied by Pavlov is any internal or external stimulus that initially causes no reaction in an organism, ie the conditioned stimulus was initially a neutral stimulus. However, through a classic conditioning process, you can create a response to this stimulus. The conditioned stimulus is the counterpart of the unconditioned stimulus.
The study of how both elements are related is the basis of conditioning and behavioral psychology. It was first studied by scientist Ivan Pavlov in his famous experiment in which he was able to salivate dogs by ringing a bell.
I really think it was Wundt. Not 100% sure though
You can... Chronic Kidney Diseases doesn't't mess heavily with overall blood composition, neither does spread between people or is dangerous to donate. There are several instances where one may not donate blood; blood transmitted disease like HIV or Syphilis, or a clotting factor deficiency, which is hemophilia, which while not exactly anything to worry about bloodwise, is much more dangerous to the person donating it, as without proper equipment or medication, a patient can bleed out.
