What is hormone ?
Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions. There are many types of hormones that act on different aspects of bodily functions and processes. Some of these include:
- Development and growth
- Metabolism of food items
- Sexual function and reproductive growth and health
- Cognitive function and mood
- Maintenance of body temperature and thirst
Where are they secreted from?
Hormones are secreted from the endocrine glands in the body. The glands are ductless, so hormones are secreted directly into the blood stream rather than by way of ducts. Some of the major endocrine glands in the body include:
- Pituitary gland
- Pineal gland
- Thymus
- Thyroid
- Adrenal glands
- Pancreas
- Testes
- Ovaries
These organs secrete hormone in microscopic amounts and it takes only very small amounts to bring about major changes in the body. Even a very slight excess of hormone secretion can lead to disease states, as can the slightest deficiency in a hormone.
List of hormone:
- Adrenaline
- Adrenocorticotropic hormone
- Aldosterone
- Androstenedione
- Angiotensin
- Anti-diuretic hormone
- Anti-Müllerian hormone
- Calcitonin
- Cholecystokinin
- Corticotrophin-releasing hormone
- Cortisol
- Dehydroepiandrosterone
- Dihydrotestosterone
- Erythropoietin
- Follicle stimulating hormone
- Gastrin
- Ghrelin
- Glucagon
- Glucagon-like peptide 1
- Glucose-dependent insulinotropic peptide
- Gonadotrophin-releasing hormone
- Growth hormone
- Growth hormone-releasing hormone
- Human chorionic gonadotrophin
- Insulin
- Kisspeptin
- Leptin
- Luteinising hormone
- Melanocyte-stimulating hormone
- Melatonin
- Oestradiol
- Oestriol
- Oestrone
- Oxytocin
- Parathyroid hormone
- Peptide YY
- Progesterone
- Prolactin
- Prostaglandins
- Relaxin
- Somatostatin
- Testosterone
- Thyroid stimulating hormone
- Thyrotropin-releasing hormone
- Thyroxine
- Triiodothyronine
- Vitamin D
The hormones produced in the hypothalamus are:
- Corticotrophin-releasing hormone
- Dopamine
- Growth hormone-releasing hormone
- Somatostatin
- Gonadotrophin-releasing hormone
- Thyrotrophin-releasing hormone.
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