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NEET • BIOLOGY • CHEMICAL COORDINATION AND INTEGRATION
Chemical coordination and integration practice · Mixed difficulty
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Showing 1-30 of 381 questions
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Assertion: Gastrin is a hormone that is released from the gastrointestinal tract and helps in digestion.
Reason: It promotes secretion of and trypsinogen.
Reason: It promotes secretion of and trypsinogen.
View answer and explanation
Correct option: C
If assertion is true but reason is false
Option C (If assertion is true but reason is false) is correct because gastrin does help in digestion, but it promotes secretion of HCl and pepsinogen, not trypsinogen.
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Easy
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Remembering
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Insulin and glucagon are transported to target organ by
View answer and explanation
Correct option: D
Cystic duct
Option B (Blood) is correct because hormones like insulin and glucagon are secreted directly into the bloodstream for transport to their target organs.
3
Easy
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Remembering
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Protein hormone bind to specific receptors that are located
View answer and explanation
Correct option: B
On the plasma membrane
Option B (On the plasma membrane) is correct because protein hormones are generally large and cannot cross the cell membrane, so they bind to receptors on the cell surface.
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Hard
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Understanding
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Which of the following statement is correct in relation to the
endocrine system?
endocrine system?
View answer and explanation
Correct option: C
Non-nutrient chemicals produced by the body in trace
amount that act as inter-cellular messenger are known as
hormones
amount that act as inter-cellular messenger are known as
hormones
Option D is correct because hormones are defined as non-nutrient chemicals produced in trace amounts that act as intercellular messengers.
5
Easy
5 of 381
Understanding
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Identify the non antagonistic hormone among the following
View answer and explanation
Correct option: D
Adrenaline and Noradrenaline
Option D (Adrenaline and Noradrenaline) is correct because adrenaline and noradrenaline have similar effects and are not antagonistic.
6
Easy
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Understanding
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Which one of the following statement is correct?
View answer and explanation
Correct option: A
Endrocrine glands regulate neural activity, and nervous
system regulates endocrine glands
system regulates endocrine glands
Option A (Endocrine glands regulate neural activity, and nervous system regulates endocrine glands) is correct because there is a bidirectional relationship between the endocrine and nervous systems, where each influences the other's activity.
7
Medium
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Remembering
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Identify the four major hormones of GI tract from the list given below: I. Gastrin, II. Secretin, III. Cholecystokinin, IV. ACTH, V. MSH, VI. GIP The correct option is
View answer and explanation
Correct option: D
I, II, III and VI
Option D (I, II, III and VI) is correct because Gastrin, Secretin, Cholecystokinin, and GIP are the four major hormones of the GI tract.
8
Medium
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Remembering
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Which hormone called as hyperglycemia
View answer and explanation
Correct option: A
Glucagon
Option A (Glucagon) is correct because glucagon increases blood glucose levels, thus it is called hyperglycemic hormone.
9
Easy
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Understanding
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Identify from the following, a hormone produced by the pituitary gland in both males and females but functional only in females.
View answer and explanation
Correct option: C
Prolactin
Option C (Prolactin) is correct because prolactin is produced by the pituitary gland in both males and females, but its primary function is to stimulate milk production in females after childbirth.
10
Easy
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Understanding
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Diabetes mellitus takes place only when
View answer and explanation
Correct option: D
β- cells of pancreas are in hypo
Option D (β- cells of pancreas are in hypo) is correct because Diabetes mellitus occurs when there is insufficient insulin production due to hypoactivity of beta cells.
11
Medium
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Remembering
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Where is oxytocin and ADH synthesized
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Correct option: C
hypothalamus
The correct answer is hypothalamus because both oxytocin and ADH are synthesized in the hypothalamus and then transported to the posterior pituitary for storage and release.
12
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Remembering
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JGC (Juxtaglomerular cell) secretes
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Correct option: C
Renin
Option C (Renin) is correct because juxtaglomerular cells (JGC) in the kidney secrete renin in response to decreased blood pressure or sodium levels.
13
Medium
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Remembering
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Over-secretion of GH in adults lead to
View answer and explanation
Correct option: B
Acromegaly
Option B (Acromegaly) is correct because over-secretion of GH in adults leads to acromegaly, characterized by enlargement of extremities and facial features.
14
Medium
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Remembering
+4 | -1
Glucagon is
View answer and explanation
Correct option: D
All of the above
Option D (All of the above) is correct because glucagon is a peptide hormone, increases blood sugar levels, and is a hyperglycemic hormone.
15
Medium
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Understanding
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Given below is a list of hormonal disorders: (a) Acromegaly, (b) Myxedema, (c) Addison’s disease, (d) Diabetes mellitus. How many of them is/are the disorders due to hyper secretion?
View answer and explanation
Correct option: A
1
Option A (1) is correct because only Acromegaly is caused by hypersecretion among the listed disorders.
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16
Medium
16 of 381
Remembering
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Which gland atrophies in adults?
View answer and explanation
Correct option: B
Thymus gland
The correct answer is B (Thymus gland) because the thymus gland undergoes atrophy (degeneration) in adults.
17
Medium
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Remembering
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Human chorionic gonadotrophin is secreted by
View answer and explanation
Correct option: D
Placenta
Option D (Placenta) is correct because human chorionic gonadotropin (hCG) is secreted by the placenta during pregnancy.
18
Easy
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Understanding
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A child with a weak immune system. Which of the following gland could be the cause of the problem?
View answer and explanation
Correct option: C
Thymus
The correct answer is C (Thymus) because the thymus gland is crucial for the development of the immune system, particularly T-lymphocytes, and its dysfunction can lead to a weak immune system in children.
19
Medium
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Analyzing
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Read the following statements.
(i) It stimulates conversion of glucose to glycogen in the target cells.
(ii) It enhances cellular glucose uptake and utilisation.
(iii) It is secreted from -cells of Islets of Langerhans.
(iv) It acts mainly on the liver cells and stimulates glycogenolysis.
How many statements are correct for glucagon hormone?
(i) It stimulates conversion of glucose to glycogen in the target cells.
(ii) It enhances cellular glucose uptake and utilisation.
(iii) It is secreted from -cells of Islets of Langerhans.
(iv) It acts mainly on the liver cells and stimulates glycogenolysis.
How many statements are correct for glucagon hormone?
View answer and explanation
Correct option: D
One
Option D (One) is correct because only statement (i) is correct for glucagon. Glucagon stimulates glycogenolysis, not glycogenesis.
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Understanding
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A: Immune response of old person becomes weak
R: Thymus is degenerated in old individual
R: Thymus is degenerated in old individual
View answer and explanation
Correct option: A
A and R are correct R is correct explanation for A
The correct answer is A (A and R are correct R is correct explanation for A) because the thymus gland degenerates in old age, which weakens the immune response.
21
Hard
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Understanding
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In the homeostatic control of blood sugar level, which organs function as modulator and effector respectively?
View answer and explanation
Correct option: C
Hypothalamus and islet of Langerhans
Option B (Hypothalamus and islet of Langerhans) is correct because the hypothalamus acts as the modulator and the islet of Langerhans acts as the effector in blood sugar control.
22
Medium
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Analyzing
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Read the following statements (A-D):-
(A) Maintenance of water and electrolyte balance is not influenced by thyroid hormones.
(B) An impairment affecting synthesis or release of ADH results in a diminished ability of the kidney to conserve water leading to water loss and dehydration.
(C) Melatonin hormone influences the menstrual cycle.
(D) Exophthalmic goitre is a form of hyperparathyroidism.
How many of the above statements are correct?
(A) Maintenance of water and electrolyte balance is not influenced by thyroid hormones.
(B) An impairment affecting synthesis or release of ADH results in a diminished ability of the kidney to conserve water leading to water loss and dehydration.
(C) Melatonin hormone influences the menstrual cycle.
(D) Exophthalmic goitre is a form of hyperparathyroidism.
How many of the above statements are correct?
View answer and explanation
Correct option: A
Two
The correct answer is A (Two) because statements B and C are correct, while A and D are incorrect.
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Medium
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Remembering
+4 | -1
Pineal gland of human brain secretes melatonin concerned with
View answer and explanation
Correct option: D
Sleep
Option A (Parathyroid hormone— Tetany) is correct because a deficiency in parathyroid hormone leads to hypocalcemia, which can cause tetany (muscle spasms).
24
Medium
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Remembering
+4 | -1
Which hormone stimulates the secretion of milk from female?
View answer and explanation
Correct option: D
Prolactin
Option D (Prolactin) is correct because prolactin is the hormone responsible for stimulating milk production in females.
25
Medium
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Understanding
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Antidiuretic hormone (ADH)
View answer and explanation
Correct option: C
Is released from the posterior pituitary and increases the permeability of kidney collecting tubules to water
The correct answer is C (Is released from the posterior pituitary and increases the permeability of kidney collecting tubules to water) because ADH increases water reabsorption in the kidneys.
26
Hard
26 of 381
Remembering
+4 | -1
Sella turcica is a depression in the sphenoid bone which lodges
View answer and explanation
Correct option: B
Hypophysis
Option B (Hypophysis) is correct because the sella turcica is a saddle-shaped depression in the sphenoid bone that houses the pituitary gland (hypophysis).
27
Easy
27 of 381
Remembering
+4 | -1
How many Islets of Langerhans are present in normal human pancreas?
View answer and explanation
Correct option: A
1 to 2 million
Option A (1 to 2 million) is correct because a normal human pancreas contains approximately 1 to 2 million Islets of Langerhans.
28
Hard
28 of 381
Application
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A tumor in the adrenal zona glomerulosa car cause hyper secretion of hormones produced in that region. Which of the following you migh expect to find in a patient with such a tumor:
View answer and explanation
Correct option: A
Increased blood sodium levels
Option A (Increased blood sodium levels) is correct because aldosterone, produced in the zona glomerulosa, promotes sodium reabsorption in the kidneys, leading to increased blood sodium levels when hypersecreted.
29
Medium
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Remembering
+4 | -1
Adenohypophysis consists of
View answer and explanation
Correct option: C
1 and 2
Option C (1 and 2) is correct because the adenohypophysis (anterior pituitary) consists of the pars distalis and the pars intermedia.
30
Medium
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Analyzing
+4 | -1
A tumor in an endocrine gland caused Jennifer to have weakened bones and usually high levels of blood calcium. Which of the following was affected?
View answer and explanation
Correct option: D
Parathyroid glands
Option D (Parathyroid glands) is correct because weakened bones and high blood calcium are symptoms of hyperparathyroidism, caused by a tumor in the parathyroid glands.
Revision notes and key takeaways
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Key Takeaways
- ✓ This set contains 381 single-correct-answer MCQs on CHEMICAL COORDINATION AND INTEGRATION.
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