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hypothalamic hormone

any hormone secreted by neurons of the hypothalamus. Neuroendocrine cells in the hypothalamus produce the hormones oxytocin and vasopressin. The axons of these cells pass through the pituitary stalk (infundibulum) to the posterior pituitary, where they are released into the bloodstream. Other neuroendocrine cells in the hypothalamus produce either releasing hormones, which stimulate secretion of anterior pituitary hormones, or inhibiting hormones, which prevent secretion of anterior pituitary hormones. These hormones travel to the anterior pituitary through the hypothalamic–pituitary portal system.

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Psychology term of the day

November 18th 2024

contrast polarity

contrast polarity

the degree of contrast between two visual elements, particularly figure and background. Contrast can be positive (light objects against dark backgrounds, e.g., a white letter printed upon black paper) or negative (dark objects against light backgrounds, e.g., a black letter printed upon white paper).