Hormones are chemical messengers produced by glands in the endocrine system. They are released into the bloodstream and travel to specific organs and tissues throughout the body to regulate a wide range of physiological processes and behaviors, including metabolism, growth, development, mood, immune function, and reproductive health.

What are the key characteristics of hormones?

Chemical Messengers

Hormones deliver instructions from glands to target cells in organs and tissues. They bind to specific receptors on or within target cells, triggering particular actions.

Specificity

Hormone specificity is the concept that each hormone acts only on certain cells, known as target cells, which have specific receptors that recognize and bind to that hormone. This ensures that hormones influence only intended tissues and processes, preventing unintended interactions elsewhere in the body.

Concentration-dependent

Hormones are effective even in very small amounts. Their effects are egulated by feedback in the body in order to maintain balance. The biological response to hormones can change depending on whether they are present at low, moderate, or high concentrations.

What are the different types of hormones?

Peptide Hormones

Peptide hormones are made up of short chains of amino acids, which are the building blocks of proteins. They help to regulate various bodily functions, including growth, metabolism, immune response, and water balance.

Steroid Hormones

Steroid hormones are derived from cholesterol. They are lipid-soluble, which allows them to easily pass through cell membranes to reach receptors inside their target cells. These types of hormones assist in regulating metabolism, immune function, development, salt and water balance, and reproduction.

Amino Acid Derivatives

Amino acid derivative hormones, also called amines, are hormones derived from single amino acids. Their role is to help regulate metabolism, mood, and stress response. Unlike peptide hormones, amino acid derivative hormones are typically smaller and may be either water-soluble or lipid-soluble, which influences how they interact with target cells.

What do hormones do?

Hormones influence and regulate processes in the body. When hormones are imbalanced, these processes do not function effectively. Below is a list of processes in the body and the corresponding hormones that help to regulate them. 

Metabolism: Thyroid hormones regulate the body’s metabolic rate.

Growth and Development: Growth hormone stimulates growth and cell reproduction.

Stress Response: Cortisol and adrenaline prepare the body for stress and regulate energy.

Blood Sugar Regulation: Insulin and glucagon help balance blood glucose levels.

Reproductive Processes: Estrogen, progesterone, and testosterone control reproductive functions.

Hormone Regulation

Hormones are often regulated by feedback loops. For example, if a hormone level is too high, its production is decreased; if it’s too low, production increases. This feedback system helps maintain balance, or homeostasis, in the body. Hormone levels can fluctuate for various reasons, including lifestyle, aging, and seasonal changes. These imbalances can lead to a number of symptoms. 

Hormone Therapy at Regenerative Medical Institute

Dr. Kenneth Orbeck is the founder and owner of Regenerative Medical Institute in Greenville, South Carolina. He dedicates his practice to helping patients achieve optimal health through a variety of personalized options, including bioidentical hormone replacement therapy. To schedule a free consultation to find out which treatment plans are best for you, visit our website or call us at 877-573-3737.