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NEET • BIOLOGY • CHEMICAL COORDINATION AND INTEGRATION
Chemical coordination and integration practice · Mixed difficulty
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211
Easy
211 of 381
Remembering
+4 | -1
Cretinism, mental retardation, low intelligence quotient, abnormal skin, deaf-mutism, etc. are the results of
View answer and explanation
Correct option: C
Hypothyroidism
Option C (Hypothyroidism) is correct because cretinism, mental retardation, low intelligence quotient, abnormal skin, and deaf-mutism are all symptoms of hypothyroidism, especially when it occurs during infancy or childhood.
212
Easy
212 of 381
Remembering
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Melatonin is secreted by
View answer and explanation
Correct option: D
Pineal gland
Option D (Pineal gland) is correct because the pineal gland is responsible for secreting melatonin, which regulates sleep-wake cycles.
213
Easy
213 of 381
Understanding
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Assertion: Hormones are nutrient substances which act as intercellular messengers.
Reason: Hormones are produced in large amount.
Reason: Hormones are produced in large amount.
View answer and explanation
Correct option: D
If both the assertion and reason are false
Option D (If both the assertion and reason are false) is correct because hormones are not nutrient substances and are produced in trace amounts, not large amounts.
214
Medium
214 of 381
Remembering
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Somatostatin
View answer and explanation
Correct option: C
Inhibits release of insulin and glucagon
Option C (Inhibits release of insulin and glucagon) is correct because somatostatin acts as an inhibitor of both insulin and glucagon secretion from the pancreas.
215
Easy
215 of 381
Understanding
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Pancreatic juice and hormones of pancreas are produced by
View answer and explanation
Correct option: D
Different cells
Option D (Different cells) is correct because pancreatic juice is produced by exocrine cells (acinar cells), while pancreatic hormones are produced by endocrine cells (islets of Langerhans).
216
Easy
216 of 381
Remembering
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Which one of the following endocrine glands functions as a biological clock and a neurosecretory transducer?
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Correct option: C
Pineal gland
Option C (Pineal gland) is correct because the pineal gland secretes melatonin, which regulates sleep-wake cycles and is influenced by light, making it a biological clock and neurosecretory transducer.
217
Medium
217 of 381
Remembering
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Which hormone causes dilation of blood vessels, increased oxygen consumption and glycogenolysis?
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Correct option: C
Adrenaline
Option C (Adrenaline) is correct because adrenaline (epinephrine) causes vasodilation, increased oxygen consumption, and glycogenolysis.
218
Hard
218 of 381
Understanding
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Assertion (A): Size of thymus increases with the advancement of age.
Reason (R): Thymosin secretion has no role in immunity.
Reason (R): Thymosin secretion has no role in immunity.
View answer and explanation
Correct option: D
Both assertion and reason are false.
Option D is correct because both the assertion and the reason are false. The thymus decreases in size with age, and thymosin plays a role in immunity.
219
Medium
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Understanding
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Due to effect of which hormone charecters like: swelling around eyes, and large and popping eye balls are observed in an individual are abserved?
View answer and explanation
Correct option: A
Less secretion of thyroxine in adult
Option A (Less secretion of thyroxine in adult) is correct because swelling around eyes and large, popping eyeballs are symptoms of hypothyroidism in adults, specifically myxedema.
220
Medium
220 of 381
Understanding
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Select the incorrect one w.r.t. cortisol?
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Correct option: B
Suppresses RBC production
Option B (Suppresses RBC production) is correct because cortisol does not suppress RBC production; it can actually stimulate it indirectly.
221
Easy
221 of 381
Understanding
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ANF has exactly opposite function of which of hormone secreted
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Correct option: C
Aldosterone
Option C (Aldosterone) is correct because ANF (Atrial Natriuretic Factor) decreases blood pressure and sodium reabsorption, while aldosterone increases them.
222
Medium
222 of 381
Remembering
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LH stimulates the synthesis and secretion of hormones called _____ in males
View answer and explanation
Correct option: A
androgens
Option A (androgens) is correct because LH (Luteinizing Hormone) stimulates Leydig cells in the testes to produce and secrete androgens, such as testosterone.
223
Medium
223 of 381
Remembering
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The decline and disappearance of …… gland by the middle age is primary cause of ageing
View answer and explanation
Correct option: B
Thymus
Option B (Thymus) is correct because the thymus gland undergoes significant involution (decline and disappearance) by middle age, contributing to the aging process due to a weakened immune system.
224
Medium
224 of 381
Understanding
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Previous questions diagram represents the mechanism of
View answer and explanation
Correct option: C
Hydrophobic hormone action
Option D (Fat soluble hormone action) is correct because the diagram likely depicts a hormone entering the cell and binding to a receptor inside, which is characteristic of hydrophobic/fat-soluble hormones.
225
Easy
225 of 381
Remembering
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Hypophyseal portal system is present between
View answer and explanation
Correct option: B
Hypothalamus and pituitary gland
Option B (Hypothalamus and pituitary gland) is correct because the hypophyseal portal system connects the hypothalamus to the anterior pituitary gland, allowing for hormonal communication.
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226
Hard
226 of 381
Analyzing
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Which is a wrong statement
(a) is a secondary messenger
(b) Cortisol is a protein hormone
(c) RAAS secretes glucocorticoids
(d) TSH is not secreted by pituitary gland
(a) is a secondary messenger
(b) Cortisol is a protein hormone
(c) RAAS secretes glucocorticoids
(d) TSH is not secreted by pituitary gland
View answer and explanation
Correct option: C
b, c and d
Option C is correct because Cortisol is a steroid hormone, not a protein hormone; RAAS secretes mineralocorticoids (aldosterone), not glucocorticoids; and TSH is secreted by the pituitary gland.
227
Easy
227 of 381
Remembering
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Which one is not a secondary messenger?
View answer and explanation
Correct option: D
Option D () is correct because sodium ions are not typically considered secondary messengers in cellular signaling pathways.
228
Medium
228 of 381
Understanding
+4 | -1
Find the correctly matched pair.
View answer and explanation
Correct option: D
Cholecystokinin - stimulates pancreatic enzyme secretions
Option D (Cholecystokinin - stimulates pancreatic enzyme secretions) is correct because Cholecystokinin (CCK) stimulates the pancreas to release enzymes.
229
Easy
229 of 381
Understanding
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A patient with a pituitary tumor might suffer with polyuria (production of too much urine) as a result of decreased secretion of
View answer and explanation
Correct option: D
ADH
The correct answer is D (ADH) because decreased secretion of ADH leads to polyuria due to reduced water reabsorption in the kidneys.
230
Hard
230 of 381
Understanding
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Which is a wrong statement :
(a) Endocrine glands secretes FSH, LH, MSH
(b) Salivary gland are exocrine gland
(c) Exocrine gland secretes lipase, amylase
(d) Cuboidal or columnar epithelium act as gland
(a) Endocrine glands secretes FSH, LH, MSH
(b) Salivary gland are exocrine gland
(c) Exocrine gland secretes lipase, amylase
(d) Cuboidal or columnar epithelium act as gland
View answer and explanation
Correct option: D
None of these
Option D (None of these) is correct because all the statements are correct.
231
Medium
231 of 381
Remembering
+4 | -1
A hormone responsible for normal sleep-wake cycle is
View answer and explanation
Correct option: C
Melatonin
Option C (Melatonin) is correct because melatonin is the hormone primarily responsible for regulating the normal sleep-wake cycle.
232
Medium
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Analyzing
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(i) Stimulate muscular growth
(ii) Aggressiveness
(iii) Act on C.N.S and influence libido
(iv) Catabolic effect on protein
(v) High pitch voice
How many of the above is not the function of testosterone ?
(ii) Aggressiveness
(iii) Act on C.N.S and influence libido
(iv) Catabolic effect on protein
(v) High pitch voice
How many of the above is not the function of testosterone ?
View answer and explanation
Correct option: C
Two
Option C (Two) is correct because a catabolic effect on protein and high pitch voice are not functions of testosterone. Testosterone has an anabolic effect on protein and causes a deeper voice.
233
Easy
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Remembering
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How many hormones given below are secreted from adenohypophysis? ADH. PRL. TSH. ACTH. MSH. GnRH
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Correct option: D
4
Option D is correct because PRL, TSH, ACTH, and MSH are all secreted from the adenohypophysis, while ADH and GnRH are not.
234
Medium
234 of 381
Understanding
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Synthesis and release of FSH from anterior pituitary is inhibited by all except
View answer and explanation
Correct option: D
Relaxin from developing follicles
Option D (Relaxin from developing follicles) is correct because Relaxin primarily functions during pregnancy to relax the pelvic ligaments and does not directly inhibit FSH release. Inhibin, estrogen, and progesterone do inhibit FSH release.
235
Easy
235 of 381
Remembering
+4 | -1
Which of the following is true for the effect of steroid hormone?
View answer and explanation
Correct option: B
Fast and long lasting
The correct answer is B because steroid hormones typically have a slow onset but long-lasting effects due to their mechanism of action involving gene transcription.
236
Medium
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Understanding
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How hormones of hypothalamus reaches Anterior pituitary ?
View answer and explanation
Correct option: C
Through portal veins
Option C (Through portal veins) is correct because hypothalamic hormones reach the anterior pituitary through the hypophyseal portal system, a specialized network of blood vessels.
237
Medium
237 of 381
Understanding
+4 | -1
Which one of the following four glands is correctly matched with the accompanying description?
View answer and explanation
Correct option: B
Thymus — Starts undergoing atrophy after puberty
The correct answer is B (Thymus — Starts undergoing atrophy after puberty) because the thymus gland begins to shrink and lose function (atrophy) after puberty.
238
Medium
238 of 381
Remembering
+4 | -1
Which of the following hormone is synthesized in both the brain and endocrine glands?
View answer and explanation
Correct option: D
Somatostatin
Option D (Somatostatin) is correct because somatostatin is synthesized in both the hypothalamus (brain) and the delta cells of the pancreas (endocrine gland).
239
Easy
239 of 381
Remembering
+4 | -1
The abbreviation TSH stands for
View answer and explanation
Correct option: C
Thyroid stimulating hormone
Option C (Thyroid stimulating hormone) is correct because TSH stands for Thyroid Stimulating Hormone, which is secreted by the anterior pituitary gland.
240
Easy
240 of 381
Remembering
+4 | -1
LH and FSH are collectively called
View answer and explanation
Correct option: D
Gonadotrophins
Option D (Gonadotrophins) is correct because LH (Luteinizing Hormone) and FSH (Follicle-Stimulating Hormone) are hormones that stimulate the gonads and are thus classified as gonadotrophins.
Revision notes and key takeaways
Review CHEMICAL COORDINATION AND INTEGRATION in your textbook or class notes, then use this set to check your understanding.
Showing 211-240 of 381 questions