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NEET • BIOLOGY • CHEMICAL COORDINATION AND INTEGRATION

Chemical coordination and integration practice · Medium

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Showing 1-30 of 198 questions

1 Medium

1 of 198

Analyzing +4 | -1

Assertion: Gastrin is a hormone that is released from the gastrointestinal tract and helps in digestion.

Reason: It promotes secretion of

{HCl}

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.

2 Medium

2 of 198

Remembering +4 | -1

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.

3 Medium

3 of 198

Remembering +4 | -1

Which hormone called as hyperglycemia

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Correct option: A

Glucagon

Option A (Glucagon) is correct because glucagon increases blood glucose levels, thus it is called hyperglycemic hormone.

4 Medium

4 of 198

Remembering +4 | -1

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.

5 Medium

5 of 198

Remembering +4 | -1

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.

6 Medium

6 of 198

Remembering +4 | -1

Over-secretion of GH in adults lead to

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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.

7 Medium

7 of 198

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.

8 Medium

8 of 198

Understanding +4 | -1

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?

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Correct option: A

Option A (1) is correct because only Acromegaly is caused by hypersecretion among the listed disorders.

9 Medium

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Remembering +4 | -1

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.

10 Medium

10 of 198

Remembering +4 | -1

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.

11 Medium

11 of 198

Analyzing +4 | -1

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

\beta

-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.

12 Medium

12 of 198

Analyzing +4 | -1

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?

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.

13 Medium

13 of 198

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).

14 Medium

14 of 198

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.

15 Medium

15 of 198

Understanding +4 | -1

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.

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16 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.

17 Medium

17 of 198

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.

18 Medium

18 of 198

Remembering +4 | -1

Which of the following hormones fall under the category of steroids?  a. Epinephrine;  b. Thyroid hormones,  c. Insulin,  d. Glucagon,  e. Cortisol,  f. Testosterone.   Choose the correct option.

View answer and explanation

Correct option: D

Only e, f

Option D (Only e, f) is correct because cortisol and testosterone are steroid hormones, derived from cholesterol.

19 Medium

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Understanding +4 | -1

Heterocrine glands are the glands, which

View answer and explanation

Correct option: C

Have dual (exo and endocrine) mode of function

Option C (Have dual (exo and endocrine) mode of function) is correct because heterocrine glands, also known as mixed glands, exhibit both exocrine and endocrine functions.

20 Medium

20 of 198

Understanding +4 | -1

Significant role of calcium balance in the body is maintained by

View answer and explanation

Correct option: B

PTH and TCT

Option B (PTH and TCT) is correct because PTH (parathyroid hormone) increases blood calcium levels, while TCT (thyrocalcitonin or calcitonin) decreases blood calcium levels, thus maintaining calcium balance.

21 Medium

21 of 198

Understanding +4 | -1

Assertion: Anterior lobe of pituitary is attached
to hypothalamus by a vein.

Reason: This attachment is done through a
portal vein.

View answer and explanation

Correct option: B

If both Assertion and Reason are true but Reason
is not the correct explanation of Assertion

The correct answer is B (If both Assertion and Reason are true but Reason is not the correct explanation of Assertion) because while both statements are correct, the portal vein's existence doesn't explain the attachment itself.

22 Medium

22 of 198

Remembering +4 | -1

Hormones produce their effect on target tissue by binding to specific proteins called as

View answer and explanation

Correct option: D

Hormone receptors

Option D (Hormone receptors) is correct because hormones produce their effect on target tissues by binding to specific proteins called hormone receptors.

23 Medium

23 of 198

Understanding +4 | -1

Identify the correct match.

View answer and explanation

Correct option: B

Hormone – Vasopressin; Disorder due to hypo secretion – Diabetes insipidus

Option B (Hormone – Vasopressin; Disorder due to hypo secretion – Diabetes insipidus) is the correct match because a deficiency in vasopressin (ADH) secretion leads to diabetes insipidus, characterized by excessive urine production.

24 Medium

24 of 198

Understanding +4 | -1

Oestrogen and testosterone are steroid hormones, and are the most likely bind to

View answer and explanation

Correct option: D

Cytoplasmic receptors

Option D (Cytoplasmic receptors) is correct because steroid hormones like estrogen and testosterone bind to cytoplasmic receptors.

25 Medium

25 of 198

Remembering +4 | -1

Aldosterone is secreted by

View answer and explanation

Correct option: A

Zona glomerulosa

Option A is correct because the zona glomerulosa of the adrenal cortex is responsible for the secretion of aldosterone.

26 Medium

26 of 198

Analyzing +4 | -1

Choose the incorrect statement w.r.t. endocrine system in the body.

View answer and explanation

Correct option: C

Sertoli cells produce a group of hormones called androgens

Option C is the incorrect statement. Sertoli cells primarily support sperm development and secrete inhibin, not androgens.

27 Medium

27 of 198

Remembering +4 | -1

Increased metabolic rate in humans is due to

View answer and explanation

Correct option: A

Hyperthyroidism

Option A (Hyperthyroidism) is correct because hyperthyroidism, an overactive thyroid, leads to excessive thyroid hormone production, resulting in an increased metabolic rate.

28 Medium

28 of 198

Remembering +4 | -1

Which hormones are called as Gonadotrophins

View answer and explanation

Correct option: A

LH and FSH

Option A is correct because LH (Luteinizing Hormone) and FSH (Follicle-Stimulating Hormone) are collectively known as gonadotropins, as they stimulate the gonads (ovaries and testes).

29 Medium

29 of 198

Understanding +4 | -1

Fight or Flight hormones

View answer and explanation

Correct option: C

Stimulate cAMP in the cytoplasm of their target cells

Option C (Stimulate cAMP in the cytoplasm of their target cells) is correct because adrenaline and noradrenaline often act through the cAMP second messenger system.

30 Medium

30 of 198

Understanding +4 | -1

Steroid hormones easily pass through the plasma membrane by simple diffusion because they

View answer and explanation

Correct option: D

Are lipid soluble

Option D (Are lipid soluble) is correct because steroid hormones are lipid-soluble, allowing them to diffuse through the plasma membrane.

Revision notes and key takeaways

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Key Takeaways

✓ This set contains 198 single-correct-answer MCQs on CHEMICAL COORDINATION AND INTEGRATION.
✓ Try each question before opening its answer. Read the explanation where one is available.
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