Definition Functions Types Causes and Diagnosis of Hormonal Disorders
Hormonal Imbalance Disease
The endocrine system is a network of glands in the human body that produce and release hormones that help control many essential body functions. Each gland releases specific hormones into the bloodstream. Hormonal disorders or endocrine diseases result when glands produce too much or too little of endocrine hormones, causing hormonal imbalance. In case of an excessive amount of a certain hormone in your body, the endocrine feedback system signals the brain, which in turn signals the proper gland to maintain the secretion level in check. However, failure in this process leads to hormonal disorders. Female bodies are more prone to getting hormonal imbalance diseases than a male body, which occur throughout their life during puberty, pregnancy, menstruation and menopause.
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Figure 1 the Endocrine System in Male and Female Body
Types Of Hormonal Disorders
The symptoms of hormonal imbalance in men and women vary widely and depend on the specific gland involved. Blood and urine tests can help to check the hormone levels in your body, and you can further go under an imaging process to locate a nodule or tumour.
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Figure 2 Gigantism
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Figure 3 Goitre
Among the many types of hormonal disorders, Diabetes is the most common of hormonal imbalance diseases. Some of them are discussed below-
Cushing’s Disease- If the pituitary gland starts to churn out more, the adrenal gland is affected. It leads to a similar condition called Cushing’s syndrome, which mostly affects children who intake a higher amount of corticosteroid medication.
Adrenal Insufficiency- The adrenal gland in the human body releases too little of cortisol which is another hormone, and sometimes aldosterone. The disease caused by this phenomenon is Addison’s disease.
Gigantism- The growth hormone is an essential hormone as it controls the growth rate in the human body as the name suggests. It is controlled by the pituitary gland. If the pituitary gland produces too much of it child’s bones and other body parts may grow abnormally. This can go in the other way around, hampering the growth in it is secreted too low.
Hyperthyroidism and Hypothyroidism- An overactive thyroid gland can cause hyperthyroidism, and an underactive thyroid gland leads to hypothyroidism in a child’s body. The most common cause for an overactive thyroid gland is Grave’s disease. Hypothyroidism, in some cases, is present at birth.
Hypopituitarism- If the Pituitary gland stops to function or releases too little or even no hormones, this phenomenon can occur. Under this condition, women may stop getting their menstruation.
Hormonal Imbalances In Men And Women
Puberty and ageing are some of the natural causes of male hormonal imbalance. Men can develop different hormonal imbalance diseases than women for their different endocrine organs and cycles. Major types of hormonal disorders in men include- Prostate cancer and hypogonadism. Symptoms of hormonal imbalances in men are- reduced sex drive, ED (erectile dysfunction), a decrease in sperm count, reduced body hair growth, osteoporosis.
Hormonal disorders in females include- Polycystic ovary syndrome, primary ovarian insufficiency, ovarian cancer, early menopause. Women naturally experience cycles of hormonal imbalance throughout their life, especially during puberty, menstruation, pregnancy, childbirth and menopause. Hormone disorder symptoms in a female body such as heavy or irregular periods, weak and brittle bones, vaginal dryness, constipation or diarrhoea, infertility are highly suggestive of medical attention.
Solved Examples
Mention some of the hormone disorder symptoms in male body.
Symptoms of hormonal imbalances in men are- reduced sex drive, ED (erectile dysfunction), a decrease in sperm count, reduced body hair growth, osteoporosis.
Name 2 hormonal disorders related to the Pituitary gland.
Acromegaly and gigantism are two hormonal disorders related to the Pituitary gland.
Did You Know
The term ‘hormone’ dates back several centuries, to the 1800s.
There are hormones which are not part of the endocrine system, such as the hormones secreted from the placenta of a pregnant woman, including estrogen and progesterone. Ghrelin and Gastrin, known as hunger-inducing hormones, are also not part of the endocrine system.
Diabetes is one of the most popular hormonal disorders, which happens when the pancreas stops producing insulin.
FAQs on Hormones and Hormonal Disorders in the Human Endocrine System
1. What are hormones in the human body?
Hormones are chemical messengers produced by endocrine glands that travel through the bloodstream to regulate body functions. They control and coordinate processes such as growth, metabolism, reproduction, and mood.
- Secreted directly into the blood by endocrine glands
- Act on specific target cells with matching receptors
- Work in very small amounts but have powerful effects
2. What is the endocrine system and how does it work?
The endocrine system is a network of glands that produce and release hormones to regulate body activities. It works through a system of hormone secretion and feedback control.
- Major glands include the pituitary, thyroid, adrenal glands, pancreas, and gonads
- Hormones are released into the bloodstream
- Hormones bind to specific receptors on target tissues
- Most processes are regulated by negative feedback mechanisms
3. What are the main types of hormones?
The main types of hormones are peptide hormones, steroid hormones, and amine hormones, classified by their chemical structure. Each type differs in solubility and mode of action.
- Peptide hormones (e.g., insulin) are made of amino acids and bind to surface receptors
- Steroid hormones (e.g., testosterone, cortisol) are lipid-soluble and act on intracellular receptors
- Amine hormones (e.g., adrenaline, thyroxine) are derived from single amino acids
4. What is the function of the pituitary gland?
The pituitary gland is known as the "master gland" because it controls other endocrine glands. It secretes hormones that regulate growth, reproduction, and metabolism.
- Releases growth hormone (GH) for body growth
- Secretes TSH to stimulate the thyroid gland
- Produces ACTH to regulate adrenal glands
- Releases FSH and LH for reproductive control
5. How does negative feedback regulate hormone levels?
Negative feedback regulates hormone levels by reducing hormone production when levels become too high. It maintains hormonal balance and prevents overproduction.
- High levels of a hormone signal the gland to stop secretion
- Low levels stimulate more hormone release
- Example: High thyroxine levels inhibit TSH secretion from the pituitary
6. What is a hormonal imbalance?
A hormonal imbalance occurs when there is too much or too little of a hormone in the bloodstream. Even small changes can disrupt normal body functions.
- Can result from gland disorders, tumors, or stress
- Affects metabolism, mood, growth, and reproduction
- May cause conditions like hypothyroidism, hyperthyroidism, or diabetes mellitus
7. What is diabetes mellitus and how is it related to hormones?
Diabetes mellitus is a hormonal disorder caused by problems with the hormone insulin. It results in high blood glucose levels due to insufficient insulin action.
- Type 1 diabetes: pancreas produces little or no insulin
- Type 2 diabetes: body cells become resistant to insulin
- Insulin is produced by the beta cells of the pancreas
8. What is hypothyroidism and hyperthyroidism?
Hypothyroidism is a condition of low thyroid hormone production, while hyperthyroidism is excessive thyroid hormone production. Both involve dysfunction of the thyroid gland.
- Hypothyroidism: causes weight gain, fatigue, slow metabolism
- Hyperthyroidism: causes weight loss, rapid heartbeat, nervousness
- Both affect levels of thyroxine (T4) and triiodothyronine (T3)
9. How do steroid hormones differ from peptide hormones?
Steroid hormones are lipid-soluble and act inside cells, whereas peptide hormones are water-soluble and act on cell surface receptors. Their differences affect transport and mechanism of action.
- Steroid hormones cross the cell membrane and bind to intracellular receptors
- Peptide hormones bind to membrane receptors and use second messengers
- Steroid hormones are derived from cholesterol
10. What is the role of hormones in puberty?
Hormones trigger puberty by stimulating the development of secondary sexual characteristics and reproductive maturity. The process is regulated by the hypothalamus-pituitary-gonadal (HPG) axis.
- The hypothalamus releases GnRH
- The pituitary secretes FSH and LH
- The gonads produce estrogen or testosterone
