Lecture 24 Endocrine System

Lecture 24 Endocrine System - Endocrine System ANSC 211:...

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Endocrine System ANSC 211: Anatomy of Domestic Animals Department of Animal and Avian Sciences University of Maryland
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Homeostasis Homeostasis is the process of maintaining normal body processes Two systems in the body provide communication and so control homeostasis. Nervous system : electric nerve impulses Endocrine system : hormones transported through bloodstream
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Endocrine System Glands Ductless, secrete into bloodstream. Hormones (messengers) Chemical substances (proteins, amino acids, steroids) that are produced by special ductless glands in one part of the body and travel through the blood to a target cell in order to produce a specific regulatory effect. Target organs Tissue with “final” biological response to the hormones
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Hypothalamic/Pituitary Axis Hypothalamus Located in the floor of the third ventricle of the brain. Receives sensory input via the nervous system. It is the link between the two communication systems in the body. It secretes “releasing factors” that cause the pituitary to release appropriate hormones (TRH, GnRH)
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Hypothalamic/Pituitary Axis Two parts to the gland: Anterior lobe (adenohypophysis) Posterior lobe (neurohypophysis)
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Lecture 24 Endocrine System - Endocrine System ANSC 211:...

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