Examlex
Which of the following types of stratification systems required peasants to work land leased to them by nobles in exchange for military protection and other services?
Leptin
A hormone produced by fat cells that regulates energy balance by inhibiting hunger, thereby regulating body weight.
Fat Cells
Cells known as adipocytes that store fat and play a crucial role in maintaining energy balance in the body.
Appetite Regulation
The biological and psychological mechanisms that control the amount and types of food consumed, influenced by hormonal and neural signals.
Effectiveness
The level of effectiveness in achieving an intended result or goal.
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