ANAT1053 Lecture Notes - Lecture 5: Growth Hormone–Releasing Hormone, Exocrine Gland, Thyroid

• School: George Brown College
• Department: ANAT
• Course: ANAT1053
• Professor: Rickson Valtellini

Document Summary

Hormones control several major processes: reproduction, growth and development, mobilization of body defences (immune system, regulation of metabolism, maintenance of much of homeostasis, water / sugar / salt levels. Endocrine glands: ductless glands, secretions (hormones) released directly into bloodstream or lymph. Some glands are purely endocrine: anterior pituitary, thyroid, adrenals, parathyroids. Can you give an example of an exocrine gland: endocrine secrete hormones directly into bloodstream, exocrine secrete products into ducts that lead ultimately to exterior of body, pancreas enzymes (to breakdown food) Hormone action: hormones affect only certain tissues or organs (target cells or target organs, salivary gland - saliva. Typically, one or more of the following occurs: changes in plasma membrane permeability or electrical state, synthesis of proteins, such as enzymes, activation or inactivation of enzymes, stimulation of mitosis, promotion of secretory activity. The action depends on the specific hormone and the target cell type.