ENDOCRINE PHYSIOLOGY
, Overview
• Multiple activities of cells, tissues and organs of
the body are coordinated by the interplay of
several types of chemical messengers among
them being HORMONES.
• Hormone: a chemical messenger released by
glands into the blood stream to influence
biological activity of distant structures.
• Adjacent image shows the locus of major endocrine glands
, Classification of hormones
• Protein and peptide hormones
• Include hormones produced by the pituitary gland, pancreas, parathyroid gland
calcitonin, hCG, renin, EPO, ADH, gastrin, secretin, CCK, leptin
• Steroids
• Produced by the adrenal cortex, ovaries, testes and placenta
• Derivatives of amino acids
• They are derivatives of the amino acid tyrosine e.g. thyroid hormones, epinephr
norepinephrine
, Synthesis and secretion of peptide hormone
, Overview
• Multiple activities of cells, tissues and organs of
the body are coordinated by the interplay of
several types of chemical messengers among
them being HORMONES.
• Hormone: a chemical messenger released by
glands into the blood stream to influence
biological activity of distant structures.
• Adjacent image shows the locus of major endocrine glands
, Classification of hormones
• Protein and peptide hormones
• Include hormones produced by the pituitary gland, pancreas, parathyroid gland
calcitonin, hCG, renin, EPO, ADH, gastrin, secretin, CCK, leptin
• Steroids
• Produced by the adrenal cortex, ovaries, testes and placenta
• Derivatives of amino acids
• They are derivatives of the amino acid tyrosine e.g. thyroid hormones, epinephr
norepinephrine
, Synthesis and secretion of peptide hormone
