Q.Removal of gonads cannot be considered as a contraceptive option. Why?
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🔒 Start your 14-day free trial to unlock the full solution →Concept understanding — Hormonal Regulation Failure
Let’s start with something you already know. Think of your body as a large, complex organisation — a company, a government, or even a school. For everything to run smoothly, there needs to be a communication system that sends instructions from the top to every department. In your body, that communication system is partly run by hormones.
Hormones are chemical messengers. They are released by special glands (like the thyroid, pancreas, or pituitary) and travel through your blood to tell specific organs what to do — when to grow, when to release energy, when to sleep, and so on. As long as every gland releases the right amount of hormone at the right time, your body stays in balance. That balance is called homeostasis.
Now, hormonal regulation failure is simply what happens when that communication system breaks down. It means a gland either releases too much of a hormone, too little, or the target organ stops responding to the hormone properly. The message gets lost, garbled, or never sent.
Why does this matter for a commerce/humanities student?
You don’t need to memorise gland names or chemical pathways. What matters is understanding the consequence: when hormonal regulation fails, the body cannot maintain its internal balance. This leads to specific disorders. The NCERT textbook (Class 11, Chapter 22 – Chemical Coordination and Integration) lists several classic examples. Here are the ones you are most likely to encounter:
- Diabetes Mellitus: The pancreas does not produce enough insulin, or the body’s cells ignore insulin. Insulin is the hormone that tells cells to take in sugar from the blood. Without it, blood sugar rises dangerously. This is the most common example of hormonal regulation failure.
- Hypothyroidism: The thyroid gland produces too little thyroxine. This slows down metabolism — you feel tired, gain weight, and feel cold. In children, it can cause severe developmental delays (cretinism).
- Hyperthyroidism: The opposite — too much thyroxine. Metabolism speeds up uncontrollably: weight loss, rapid heartbeat, sweating, and irritability.
- Gigantism / Acromegaly: Too much growth hormone from the pituitary gland. In children, it causes excessive growth (gigantism). In adults, it causes bones of the hands, feet, and face to enlarge (acromegaly).
- Dwarfism: Too little growth hormone in childhood leads to stunted growth, but normal body proportions.
The key idea is feedback loop failure. Normally, if a hormone level rises too high, the brain tells the gland to stop producing it. If the level drops too low, the brain tells the gland to produce more. In hormonal regulation failure, this feedback loop is broken — the gland keeps producing too much or too little, regardless of what the body needs.
A simple analogy
Imagine a thermostat connected to an air conditioner. The thermostat senses the room temperature and tells the AC to turn on or off. That’s normal regulation.
Now imagine the thermostat is broken. It keeps telling the AC to run even when the room is freezing — that’s overproduction (hyperthyroidism). Or it never tells the AC to turn on, even when the room is sweltering — that’s underproduction (hypothyroidism). Or the AC itself is broken and ignores the thermostat’s signal — that’s hormone resistance (like in type 2 diabetes).
The room (your body) can’t stay comfortable. That’s hormonal regulation failure.
What causes it?
The NCERT textbook mentions several causes, but for a prose subject, you only need the broad categories:
- Genetic defects – you are born with a gland that doesn’t work properly.
- Autoimmune attacks – the body’s own immune system mistakenly attacks a gland (e.g., Hashimoto’s thyroiditis destroys the thyroid).
- Tumours – a benign growth in a gland can cause it to secrete hormones uncontrollably.
- Nutritional deficiencies – for example, lack of iodine in the diet leads to hypothyroidism (goitre). …
Removal of gonads — the ovaries in females and the testes in males — is a permanent surgical procedure called gonadectomy. It stops the production of gametes (eggs and sperm), so it does prevent fertilisation. But that is not the only function of the gonads. They are also endocrine glands that secrete the sex hormones: oestrogen and progesterone from the ovaries, and testosterone from the testes.
These hormones are essential for the development and maintenance of secondary sexual characteristics — such as breast development, body hair distribution, and voice changes — as well as for normal bone density, muscle mass, and overall metabolic health. Removing the gonads would cause a sudden and irreversible loss of these hormones, leading to a condition similar to surgical menopause or castration. The side effects include hot flushes, osteoporosis, loss of libido, and increased risk of cardiovascular disease. …
Removal of gonads (ovaries or testes) is not a contraceptive option because it causes permanent sterility, severe hormonal imbalances, and irreversible health consequences that go far beyond preventing pregnancy.
The question touches on a fundamental principle in reproductive biology: contraception aims to prevent pregnancy without destroying the body's normal function. Gonads — the ovaries in females and testes in males — are not merely organs that produce gametes (eggs and sperm). They are endocrine glands that secrete essential hormones: oestrogen and progesterone from the ovaries, and testosterone from the testes. These hormones regulate not just reproduction but also bone density, muscle mass, fat distribution, mood, libido, and secondary sexual characteristics.
Removing the gonads would certainly prevent pregnancy — no eggs or sperm means no fertilisation. But that is like using a sledgehammer to crack a nut. The procedure, called gonadectomy (oophorectomy in females, orchidectomy in males), is a major surgical intervention with lifelong consequences. In females, it induces immediate surgical menopause, with hot flushes, vaginal dryness, osteoporosis risk, and increased cardiovascular disease. In males, it causes loss of libido, erectile dysfunction, muscle wasting, and osteoporosis. These are not side effects — they are the direct result of removing the body's primary source of sex hormones.
The NCERT textbook explicitly states that "removal of gonads cannot be considered a contraceptive option" because it leads to "permanent sterility and loss of sexual characteristics." This is a key point often tested in board exams.
Contraceptive methods are designed to be reversible or at least minimally disruptive to normal physiology. Barrier methods (condoms, diaphragms), hormonal pills, intrauterine devices (IUDs), and even surgical sterilisation (vasectomy or tubectomy) all preserve the gonads and their hormone production. Vasectomy, for example, only cuts the vas deferens — the testes continue producing testosterone and sperm, though sperm cannot reach the semen. Tubectomy blocks the fallopian tubes but leaves ovaries intact, so hormone cycles continue normally. In contrast, gonadectomy destroys both gamete production and hormone secretion, making it a form of castration, not contraception. …
- AP EAPCET 2026Set ap-2026-05-20-FN1 markMCQQ.Match the following: List-I | List-II A. Hyperthyroidism | I. Tetany B. Enlargement of thyroid gland | II. Addison's disease C. Hypoparathyroidism | III. Exophthalmic goiter D. Under secretion of glucocorticoids | IV. Simple goiter | V. Cushing's syndrome (A) A-II, B-I, C-IV, D-III (B) A-III, B-IV, C-I, D-II (C) A-V, B-I, C-III, D-IV (D) A-III, B-IV, C-I, D-V
›Reveal solutionSolution
Hyperthyroidism links to exophthalmic goiter (III), simple thyroid enlargement to simple goiter (IV), hypoparathyroidism to tetany (I), and glucocorticoid under-secretion to Addison's disease (II) — giving A-III, B-IV, C-I, D-II, option (B).
Concept and Intuition
Endocrine-disorder matching questions reward knowing the hormone, the gland, and the direction of dysfunction (over- vs. under-secretion) together with its named clinical syndrome: too much thyroid hormone → Graves'/exophthalmic goiter; enlarged-but-not-necessarily-hyperactive thyroid → simple goiter; too little parathyroid hormone → low calcium → tetany; too little adrenal cortex output (glucocorticoids/mineralocorticoids) → Addison's disease; too much glucocorticoid → Cushing's syndrome (not needed here).
Step-by-Step Solution
- Hyperthyroidism: excess thyroxine typically causes an autoimmune-driven enlarged, overactive thyroid with characteristic eye bulging — exophthalmic goiter (Graves' disease). Matches III.
- Enlargement of the thyroid gland alone (without necessarily overproducing hormone, often from iodine deficiency) is termed simple/endemic goiter. Matches IV. …
- AP EAPCET 2025Set ap-2025-05-19-FN1 markMCQQ.Match the following. Hormone - Disorder A) Thyroxine - I. Addison's disease B) Vasopressin - II. Diabetes mellitus C) Glucocorticoids - III. Acromegaly D) Somatotropin - IV. Myxedema
- V. Diabetes insipidus (A) A - IV, B - II, C - I, D - III (B) A - V, B - II, C - IV, D - I (C) A - III, B - I, C - V, D - IV (D) A - IV, B - V, C - I, D - III
›Reveal solutionSolution
Thyroxine→Myxedema, Vasopressin→Diabetes insipidus, Glucocorticoids→Addison's disease, Somatotropin→Acromegaly. Answer: (D).
Concept and Intuition
Endocrine hormone-disorder pairings tested here:
- Thyroxine (thyroid hormone) deficiency in adults causes Myxedema (characterized by low metabolic rate, puffiness/oedema, cold intolerance); deficiency in children causes cretinism.
- Vasopressin (Antidiuretic Hormone, ADH) deficiency impairs the kidney's ability to concentrate urine, causing Diabetes insipidus (excessive dilute urine output, distinct from diabetes mellitus).
- Glucocorticoids (e.g., cortisol) deficiency (often due to adrenal cortex damage) causes Addison's disease (fatigue, weight loss, hypotension, skin pigmentation).
- Somatotropin (Growth Hormone, GH) in excess, after epiphyseal plate closure (i.e., in adults), causes Acromegaly (enlargement of hands, feet, facial bones); excess before puberty causes gigantism.
Step-by-Step Solution
- Match A (Thyroxine) to its associated disorder: Myxedema = IV.
- Match B (Vasopressin) to its associated disorder: Diabetes insipidus = V. …
- AP EAPCET 2025Set ap-2025-05-20-FN1 markMCQQ.Match the following Hormones - Disorders A) Insulin - I. Addison's disease B) Growth Hormone - II. Acromegaly C) Thyroxine - III. Diabetes mellitus D) Cortisol - IV. Cretinism
- V. Diabetes insipidus (A) A-III, B-IV, C-V, D-II (B) A-III, B-II, C-IV, D-I (C) A-V, B-II, C-IV, D-I (D) A-IV, B-I, C-III, D-II
›Reveal solutionSolution
Insulin–Diabetes mellitus (III), Growth Hormone–Acromegaly (II), Thyroxine–Cretinism (IV), Cortisol–Addison's disease (I). Answer: (B).
Concept and Intuition
Each endocrine gland's hormone, when deficient or excessive, produces a characteristic clinical disorder taught as a standard hormone-disorder pairing in human physiology:
- Insulin deficiency/insensitivity → high blood glucose → Diabetes mellitus.
- Growth Hormone excess in adults (after epiphyseal plates have closed) → enlargement of extremities/bones → Acromegaly (excess in children instead causes gigantism).
- Thyroxine deficiency from birth/childhood → stunted physical and mental growth → Cretinism (deficiency in adults instead causes myxoedema).
- Cortisol deficiency (adrenal cortex insufficiency) → Addison's disease; cortisol excess instead causes Cushing's syndrome, which is not one of the listed options here.
Step-by-Step Solution
- A) Insulin → Diabetes mellitus, item III.
- B) Growth Hormone → Acromegaly, item II.
- C) Thyroxine → Cretinism, item IV. …
- AP EAPCET 2025Set ap-2025-05-20-FN1 markMCQQ.Cushing's syndrome is due to hypersecretion of (A) Aldosterone (B) Adrenalin (C) Epinephrine (D) Cortisol
›Reveal solutionSolution
Cushing's syndrome results specifically from excess cortisol secreted by the adrenal cortex. Answer: (D).
Concept and Intuition
The adrenal cortex secretes several classes of steroid hormones from different zones: mineralocorticoids (aldosterone, from zona glomerulosa, regulating Na⁺/K⁺ and blood pressure) and glucocorticoids (cortisol, from zona fasciculata, regulating glucose metabolism and stress response). Each hormone's excess or deficiency produces a distinct named syndrome, and Cushing's syndrome is specifically defined by chronic glucocorticoid (cortisol) excess, whether from the adrenal gland itself, a pituitary ACTH-secreting tumour, or long-term steroid medication.
Step-by-Step Solution
- Recall that Cushing's syndrome presents with features like central obesity, moon face, hyperglycemia, hypertension and muscle wasting — all consequences of chronically elevated glucocorticoid activity.
- Among the options, aldosterone excess would instead cause hyperaldosteronism (hypertension with hypokalemia, not the classic Cushing's picture). …
- AP EAPCET 2024Set ap-2024-05-16-AN1 markMCQQ.Removal of this gland results in the death of an individual (A) Adrenal cortex (B) Testis (C) Thyroid gland (D) Thymus gland
›Reveal solutionSolution
Complete removal of the adrenal cortex is fatal because its mineralocorticoids are essential for electrolyte and water balance.
Concept and Intuition
The adrenal cortex secretes three classes of steroid hormones: glucocorticoids (metabolism, stress response), mineralocorticoids (chiefly aldosterone, regulating Na+/K+ balance and blood volume via the kidney), and small amounts of sex corticoids. Aldosterone in particular is indispensable — without it, the body cannot retain sodium and water properly, leading to severe dehydration, dangerously low blood pressure, and fatal electrolyte imbalance. In contrast, removing the testis affects fertility/secondary sexual traits but is not immediately lethal; hypothyroidism from thyroid removal causes serious but manageable metabolic slowdown (treatable with hormone replacement); and the thymus naturally involutes with age without causing death.
Step-by-Step Solution
- Recall the adrenal cortex's key secretion, aldosterone, controls life-sustaining electrolyte/water balance. …
- AP EAPCET 2023Set ap-2023-05-22-FN1 markMCQQ.Identify the correct option Statement – I (SI) – Hypo secretion of Cortisol results in low blood pressure. Statement – II (SII) – Elevated levels of Cortisol leads to hyperglycemia (A) Statement - I and Statement – II are correct. (B) Statement - I is wrong and Statement – II is correct. (C) Statement - I is correct and Statement – II is wrong. (D) Statement - I and Statement – II are wrong.
›Reveal solutionSolution
Tests both extremes of cortisol dysfunction: deficiency and excess. Answer: (A) — both statements correct.
Concept and Intuition
Cortisol, the principal glucocorticoid from the adrenal cortex, has several physiological roles: it supports vascular reactivity/blood pressure maintenance (partly by potentiating the action of catecholamines on blood vessels) and it raises blood glucose via gluconeogenesis and reduced peripheral glucose uptake.
Step-by-Step Solution
- Statement I: hypo-secretion of cortisol (as in Addison's disease) removes this vascular-supportive/glucose-elevating action, leading to hypotension and hypoglycemia — so "low blood pressure" from cortisol deficiency is correct.
- Statement II: chronically elevated cortisol (as in Cushing's syndrome) drives excess gluconeogenesis, causing hyperglycemia — correct. …
- AP EAPCET 2022Set ap-2022-07-11-FN1 markMCQQ.In parasitic castration ____________ (A) Gonads of the host degenerate (B) Size of the Gonads of the host increases (C) No change in the Gonads of the host (D) Gonads of the parasite degenerate
›Reveal solutionSolution
This tests the definition of parasitic castration; the answer is that the host's gonads degenerate.
Concept and Intuition
Many successful parasites do not kill their host outright (a dead host is a dead resource); instead, some manipulate host physiology to their own advantage. 'Parasitic castration' is a well-documented strategy where the parasite interferes with the host's reproductive system so severely that the host's own gonads shrink/degenerate — this stops the host from wasting energy on reproduction and redirects those resources to supporting the parasite's growth (classic examples: Sacculina barnacles feminizing/castrating crabs; certain trematode sporocysts castrating snail hosts).
Step-by-Step Solution
- Size of host gonads increasing (B) is the opposite of what is observed — castration means shrinkage/loss of function, not growth.
- No change in gonads (C) contradicts the very definition of 'castration', which implies a definite reproductive impairment. …
- AP EAPCET 2022Set ap-2022-07-11-FN1 markMCQQ.Identify the characteristic features of the cretinism disorder (A) Gorilla like face, dry skin, thickened nose (B) Stunted growth, mental retardation, deafness and mutism (C) Irregular menstrual cycle, stunted growth, Abnormal eyes lids (D) Darkening of the skin, High intelligence quotient, long limbs
›Reveal solutionSolution
This tests the clinical features of childhood hypothyroidism (cretinism); the answer is stunted growth, mental retardation, deafness and mutism.
Concept and Intuition
Thyroid hormones (T3/T4) are essential for normal growth and neural development, particularly during infancy and childhood. When thyroid hormone is deficient from birth (cretinism), the child's bones fail to grow and mature properly (stunted growth/dwarfism), and brain development is severely impaired, causing mental retardation; associated developmental abnormalities of hearing and speech pathways commonly result in deafness and mutism. This full picture of cretinism contrasts with adult hypothyroidism (myxoedema) and with other endocrine disorders described in the distractor options.
Step-by-Step Solution
- 'Gorilla-like face, dry skin, thickened nose' (A) describes features of acromegaly (excess growth hormone in adults, causing coarsened facial features), not cretinism.
- 'Irregular menstrual cycle, stunted growth, abnormal eyelids' (C) is a jumbled, non-standard mix that does not match the classic cretinism triad. …
- AP EAPCET 2022Set ap-2022-07-11-FN1 markMCQQ.Identify the symptoms of Cushing's syndrome (A) Muscle weakness, fatigue, dry skin (B) Moon face, Buffalo hump, Pendulous abdomen (C) Puffy face, dry skin, enlarged eyes (D) Weight loss, intolerance to cold, fatigue
›Reveal solutionSolution
This tests the classic clinical presentation of Cushing's syndrome (hypercortisolism); the answer is moon face, buffalo hump, pendulous abdomen.
Concept and Intuition
Cushing's syndrome is caused by chronically elevated cortisol levels (from adrenal cortex overactivity, a cortisol-secreting tumour, or excess ACTH stimulation). Cortisol excess causes characteristic fat redistribution to the face (giving a round 'moon face'), to the back of the neck/upper back (a 'buffalo hump'), and to the abdomen, while limbs often become thin due to muscle wasting — the abdomen appears sagging/pendulous from this central fat deposition combined with weakened abdominal muscles.
Step-by-Step Solution
- 'Muscle weakness, fatigue, dry skin' (A) is a vague, non-specific set of symptoms that could apply to many endocrine disorders, not the specific diagnostic triad of Cushing's syndrome.
- 'Puffy face, dry skin, enlarged eyes' (C) does not match the specific 'moon face + buffalo hump + pendulous abdomen' triad; enlarged eyes (exophthalmos) is more characteristic of hyperthyroidism/Grave's disease. …
- AP EAPCET 2022Set ap-2022-07-12-FN1 markMCQQ.Abnormal growth of the bones especially of the face bones leads to (A) Acromegaly (B) Cushing's syndrome (C) Dwarfism (D) Goiter
›Reveal solutionSolution
Abnormal enlargement of face/extremity bones in adults, due to excess growth hormone, is called acromegaly.
Concept and Intuition
Growth hormone (GH) hypersecretion has different effects depending on the age of onset: before puberty (before bone growth plates fuse) it causes gigantism (excessive height); after the growth plates have closed in adulthood, excess GH instead causes disproportionate thickening/enlargement of bones especially in the face, hands, and feet — this is acromegaly.
Step-by-Step Solution
- Recognise the clue: "abnormal growth of bones especially of the face bones" points to a condition affecting adults post-puberty (since it targets facial bone thickening rather than overall height increase).
- This matches acromegaly, caused by GH-secreting pituitary adenomas in adults. …
- AP EAPCET 2021Set ap-2021-09-03-FN1 markMCQQ.The condition in which Kidneys fail to conserve water leading to water loss and dehydration due to impaired ADH synthesis or release is ________ (A) Diabetes mellitus (B) Glycosuria (C) Ketonuria (D) Diabetes insipidus
›Reveal solutionSolution
A defect in ADH synthesis/release causing failure to conserve water and dehydration is Diabetes insipidus, distinct from Diabetes mellitus (a glucose/insulin disorder).
Concept and Intuition
ADH (antidiuretic hormone, vasopressin) acts on the distal convoluted tubule and collecting duct of the nephron, increasing their permeability to water so that water is reabsorbed back into the blood, concentrating the urine. If ADH is not synthesized (by hypothalamic neurons) or not released (from the posterior pituitary) properly, the collecting duct stays impermeable to water — large volumes of dilute urine are excreted regardless of the body's water needs, leading to excessive water loss and dehydration.
Step-by-Step Solution
- Identify the hormone involved: ADH regulates water reabsorption in the kidney's distal parts.
- A defect in ADH production/release means water cannot be conserved, producing large volumes of dilute urine (polyuria) and consequent dehydration — this defines Diabetes insipidus.
- Rule out Diabetes mellitus (option A) — that is a disorder of insulin/glucose regulation, unrelated to ADH. …
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