Answer: alternative D.
Explanation: The animals that go through this process understand that everytime they drink the unusual-tasting liquid they will be injected, being that a very unpleasant series of events. They are conditioned, therefore, to be afraid of the unpleasantness of this process by associating pain to the actions that are part of it.
Wastes from the blood leave the kidneys thru the ureter. From there the waste travels to the urinary bladder. Then the urethra carries liquid wastes from the urinary bladder to the outside of the body
<span><span>Oxygen 0.65</span><span>6</span><span>1 Hydrogen 0.10</span><span>7</span></span>
