I think its more of biochemical issue. I don't think post-mortem analysis will result in any unique findings. Fair disclaimer here, I have no in-depth knowledge on dissection, but it is my understanding that the tissues will not be changed drastically as a result of biochemical malfunction. However, there was a case in early 2000s where a man had acquired an egg-sized brain tumor in the right orbitofrontal region and suddenly began exhibiting characteristics of pedophillia. Once the tumor was removed, his urges went away and later on returned when the tumor grew back. I haven't found any articles discussing the hormonal changes that his tumor may have caused. But then again, ANY kind of sexual deviance and sociopathic behaviors have been linked to issues in the frontal lobe. I guess it's all dependent on the individual.
Biological disorders shouldn't affect one's morality. They can make morals harder to attain, but at the end of the day, people are going to do what they want. The man with the tumor was also experiencing difficulties with other tasks, he lost a substantial amount of brain matter. He was essentially becoming mentally incapacitated, therefore he was truly incapable of understanding his own actions.
Your book made it confusing by defining hemorrhage as a loss of Erythrocytes. Hemorrhage is a broad term indicating any kind of bleeding. Blood consists of other components besides erythrocytes, including leukocytes, plasma and platelets. During a hemorrhage, you are losing all of these components. I haven't taken hematology so I don't know the specifics but in Physio, we learned that the main function of RBCs is oxygen/ co2 transport, WBCs is immune/ inflammatory properties, and plasma is the main center for Hormone transfer. A hemorrhage will interrupt all of these processes, therefore the most important thing during a hemorrhage would be to restore blood volume and pressure before the body can return to Homeostasis. So to answer your question, once blood volume and pressure are restored, the kidneys will detect the decrease in O2 and secrete Erythropoeitin to begin the process of Erythropoeises and restore the lost Erythrocytes.