Introduction To Endocrinology, Hormones and Their Classification Lecture NO: 2 Mbbs
Introduction To Endocrinology, Hormones and Their Classification Lecture NO: 2 Mbbs
Introduction To Endocrinology, Hormones and Their Classification Lecture NO: 2 Mbbs
their classification
Lecture NO : 2nd MBBS
Dr UZUEGBU U.E
Endocrinology – the study of endocrines
• Act locally on the cells other than those that produce them
• Diffuse into the ECF from their site of synthesis and bind
with the receptors of the neighboring cells to :
• initiate their action like :
• Angiotensin 11 ; Eicosanoids, Sex steroids of the ovary
(acts on Garrafian Follicles)
Paracrines – moves via ECF
act locally
Juxtracrines – Are not delivered to ECF/blood
act on adjacent cell receptors