Respuesta :
The student asks the professor for a definition of ""orexigenic neurons."" Orexigenic neurons promote appetite, stimulate eating, and decrease metabolism.
The anorexigenic neurons suppress appetite, inhibit eating, increase metabolism, and promote satiety after eating. PTS: 1 DIF: Cognitive Level: Understanding.
Leptin and insulin provide information on the nutritional state, while orexigenic and anorexigenic peptide signals from the gastrointestinal tract reflect the feeding state for the CNS; these two combined control body mass/composition.
In obesity, resistance to anorexigenic signals (anorexigenic gastrointestinal peptides, leptin, insulin) may develop, although in calorie-restricted states, no such resistance was shown.
Primary alterations in nutritional condition modify this complex signaling (as if promoting further obesity or maintenance of lean shape, respectively).
The dietary state had a less significant impact on orexigenic signaling. Middle-aged obesity may also be explained by aging in conjunction with resistance to anorexigenic signals.
Regardless of dietary status, late stages of aging are characterized by increased leptin sensitivity and heightened catabolic processes.
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