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NEET • BIOLOGY • CHEMICAL COORDINATION AND INTEGRATION

Chemical coordination and integration practice · Mixed difficulty

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Showing 361-381 of 381 questions

361 Medium

361 of 381

Understanding +4 | -1

Correct order of action of hydrophilic hormones;  I. Hormones bind to plasma membrane,  II. Physiological response,  III. Biochemical response,  IV. Generation of secondary messenger.   Choose the correct option

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Correct option: C

I, IV, III, II

Option C (I, IV, III, II) is correct because hydrophilic hormones first bind to the plasma membrane, generate a secondary messenger, then cause a biochemical response, and finally a physiological response.

362 Medium

362 of 381

Remembering +4 | -1

Corpus luteum secretes

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Correct option: A

Progesterone and oestrogen

Option A (Progesterone and oestrogen) is correct because the corpus luteum secretes both progesterone and oestrogen, although progesterone is the primary hormone.

363 Medium

363 of 381

Understanding +4 | -1

Which of the following are not the effects of  Parathyroid hormone?
a) Stimulates the process of bone resorption
b) Decreases

C{a^{2 + }}

level in blood
c) Reabsorption of

C{a^{2 + }}

+ by renal tubules
d) Decrease the absorption of

C{a^{2 + }}

from digested food
e) Increases metabolism of carbohydrates
Choose the most appropriate answer from options given below:

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Correct option: C

(b),(d) and (e) only

The correct answer is C ((b),(d) and (e) only) because PTH increases calcium levels in the blood, increases calcium absorption from digested food, and does not directly affect carbohydrate metabolism.

364 Medium

364 of 381

Remembering +4 | -1

Tetany is caused by

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Correct option: B

Hypoparathyroidism

Option B (Hypoparathyroidism) is correct because tetany, characterized by muscle spasms, is caused by low blood calcium levels resulting from hypoparathyroidism.

365 Easy

365 of 381

Remembering +4 | -1

Which of the following hormones is not a secretary product of human placenta?

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Correct option: B

Prolactin

Option B (Prolactin) is correct because prolactin is primarily secreted by the anterior pituitary gland, not the placenta.

366 Medium

366 of 381

Understanding +4 | -1

Which one of the following pairs is incorrectly matched?

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Correct option: A

Glucagon - Beta cells (source)

Option A (Glucagon - Beta cells (source)) is correct because glucagon is secreted by Alpha cells, not Beta cells.

367 Easy

367 of 381

Analyzing +4 | -1

Which of the following statements are not associated with the pituitary gland?
(A) Pars nervosa is also known as posterior pituitary
(B) Pars distalis produces 6 hormones
(C ) Oxytocin/ADH is actually synthesised by the pars inter media
(D) Oxytocin/ADH are transported axonally to pars distalis

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Correct option: B

C and D

Option B (C and D) is correct because Oxytocin/ADH are synthesized in the hypothalamus and transported axonally to the pars nervosa (posterior pituitary), not the pars intermedia or pars distalis.

368 Medium

368 of 381

Remembering +4 | -1

Adrenaline and noradrenaline are hormones that act as

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Correct option: C

Neurotransmitters

Option C is correct because adrenaline and noradrenaline can act as neurotransmitters in the nervous system, in addition to being hormones.

369 Medium

369 of 381

Remembering +4 | -1

Diabetes is characterised by:I. Polyuria,  II. Polydipsia,  III. Polyphagia,  IV. Hyperglycemia,  V. Glycosuria, VI. Ketosis , VII. Acidosis, VIII. Coma.  The option with correct characters is

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Correct option: C

I, II, III, IV, V, VI, VII and VIII

Option C (I, II, III, IV, V, VI, VII and VIII) is correct because all listed symptoms (Polyuria, Polydipsia, Polyphagia, Hyperglycemia, Glycosuria, Ketosis, Acidosis, Coma) are characteristic of uncontrolled diabetes.

370 Easy

370 of 381

Remembering +4 | -1

The thymus gland is a lobular structure located on the …A… side of the …B… and aorta. The thymus plays a significant role in the development …C… system
Choose the correct combination of A, B and C

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Correct option: C

A-dorsal, B-heart, C-immune

Option A-ventral, B-heart, C-immune is correct because the thymus gland is located on the dorsal side of the heart and aorta, and it plays a crucial role in the development of the immune system.

371 Medium

371 of 381

Remembering +4 | -1

Which one of the following statements is incorrect?

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Correct option: B

Androgens are produced by ovary

Option B (Androgens are produced by ovary) is correct because androgens are primarily produced by the testes in males and in smaller amounts by the adrenal glands in both sexes. Ovaries primarily produce estrogens and progesterone.

372 Medium

372 of 381

Remembering +4 | -1

The term hormone was given by

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Correct option: B

Starling for secretin

Option B (Starling for secretin) is correct because Starling coined the term hormone for secretin after its discovery.

373 Easy

373 of 381

Remembering +4 | -1

Which of the following is the largest gland in an adult man?

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Correct option: B

Liver

Option B (Liver) is correct because the liver is the largest internal organ in the human body by mass.

374 Medium

374 of 381

Understanding +4 | -1

The anterior pituitary

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Correct option: B

Receives releasing and inhibiting hormones from the
hypothalamus through portal vessels connecting
capillary beds

Option B (Receives releasing and inhibiting hormones from the hypothalamus through portal vessels connecting capillary beds) is correct because the anterior pituitary receives regulatory hormones from the hypothalamus via the hypophyseal portal system.

375 Easy

375 of 381

Remembering +4 | -1

Which of the following hormone has an inactive form?

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Correct option: B

Insulin

Option B (Insulin) is correct because insulin is synthesized as proinsulin, an inactive precursor, which is then cleaved to form active insulin.

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376 Easy

376 of 381

Remembering +4 | -1

Select the hormone of adrenal cortex which is responsible for hyperglycaemia.

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Correct option: C

Cortisol

Option C is correct because cortisol, a glucocorticoid, stimulates gluconeogenesis, leading to increased blood glucose levels (hyperglycemia).

377 Easy

377 of 381

Remembering +4 | -1

Islets of Langerhans are found in

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Correct option: D

Endocrine pancreas

Option D (Endocrine pancreas) is correct because the Islets of Langerhans are the hormone-producing clusters of cells within the pancreas.

378 Hard

378 of 381

Analyzing +4 | -1

A tumour in adrenal cortex can produce all of these conditions, except

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Correct option: B

Bronze like pigmentation of skin

Option B (Bronze like pigmentation of skin) is correct because it is associated with Addison's disease (adrenal insufficiency), not adrenal cortex tumors causing hormone excess.

379 Medium

379 of 381

Understanding +4 | -1

Assertion (A): Grave’s disease is characterized by enlargement of the thyroid gland, increased BMR, weight loss, protrusion of eye balls etc.

Reason (R): Grave’s disease is a form of hypothyroidism.

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Correct option: C

A is true but R is false

The correct answer is C (A is true but R is false) because Grave's disease is a form of hyperthyroidism, not hypothyroidism.

380 Medium

380 of 381

Understanding +4 | -1

Significant role in calcium balance in the body is performed by;  I. PTH,  II.

{\mathrm{T}_4}

and

{\mathrm{T}_3}

, III. TCT.  The correct option is

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Correct option: C

I and III

Option C (I and III) is correct because PTH increases blood calcium levels, and TCT (Calcitonin) decreases blood calcium levels.

381 Medium

381 of 381

Understanding +4 | -1

Steroid hormones work as

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Correct option: A

They enter into target cells and binds with specific receptor and activates specific genes to form protein

Option A (They enter into target cells and binds with specific receptor and activates specific genes to form protein) is correct because steroid hormones act by directly influencing gene expression after binding to intracellular receptors.

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