the hypothalamus is the region in brain portion that controls hunger signals.
the hypothalamus is the region in brain portion that controls hunger signals.
the region in brain portion that controls hunger signals?
the hypothalamus
neural circuits in the brain stem are able to control acceptance or rejection of sweet or bitter foods, and can be modulated by satiation or physiological hunger signals. signals from the tongue, stomach, small intestine and liver are received by the area postrema and nucleus of the solitary tract, which then send information to many regions of the forebrain that control food intake. the lateral hypothalamus contains two sets of neurons that increase eating and decrease metabolic rate by secreting the peptides orexin and melanin concentrating hormone (mch). neuropeptide y (npy) in the lateral hypothalamus induces ravenous eating; neurons that secrete npy are targeted by ghrelin in the hypothalamus. leptin desensitizes the brain to hunger signals and inhibits npy-secreting neurons.
ingestive behaviors
oriental hornets communicate through sound vibrations. there are three main types of vibrations used to communicate: taps to the queen, awakening taps, and larval hunger signals. when workers tap while facing the queen three effects are noted: the queen starts to search the combs for vacant cells in which to lay her eggs in, the workers go back to performing their typical duties, and hunger signals by larvae cease immediately and are not resumed for at least 30 minutes. the main purpose of these taps seem to be to encourage the queen to lay more eggs. awakening taps by workers cause a general intensification of activities in the colony. the effects are minimal during the day. at night, however, the vibrations wake the whole colony which causes the larvae commence their hunger signals and the workers to go forage for food to feed the larvae. larval hunger signals produce no detectable changes in larval activity during the daytime. the workers, however, will to pay more attention and give more food to the cells which are in the vicinity of where the vibrations originated. at night, the larvae will emulate each other's hunger signals and awake the whole nest.
oriental hornet