Debt
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I think, but im not sure.
Answer:
It had an extensive library the largest in the ancient world and people wanted to go to Alexandria's museum.
Answer:
Serotonin, GABA, Dopamine and norepinephrine
Explanation:
A mood disorder is a serious change in the mood, there are three groups: depressive, manic and bipolar disorder. These disorders can be caused by a neurotransmitter's inbalance or a disruption in the communication between the brain and the body, <em>the main neurotransmitters that regulate the mood are serotonin and GABA (calming) and dopamine and norepinephrine (stimulating).</em>
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Events in the dog's environment.
The secretion by the digestive glands in acknowledgment of stimuli correlated with the ingestion of food is called Psychic Secretion. such as the appearance and smell of food, the circumstances under which it is consumed is called Psychic Secretion.
Salivating to food in the mouth is reflexive, this involves no learning. However, dogs don't generally salivate at the perception of an empty bowl or the noise of footsteps. These unusual acknowledgments fascinated Pavlov, and hence he called the dogs as “psychic secretions”.
