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NEET • BIOLOGY • CHEMICAL COORDINATION AND INTEGRATION

Chemical coordination and integration practice · Medium

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Showing 181-198 of 198 questions

181 Medium

181 of 198

Remembering +4 | -1

Androgens are secreted under the stimulation of

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Correct option: B

Luteinizing hormone

Option B (Luteinizing hormone) is correct because LH stimulates Leydig cells in the testes to produce androgens like testosterone.

182 Medium

182 of 198

Analyzing +4 | -1

Assertion: Insulin forms a hormone receptor
complex which regulates gene expression.

Reason: It is a peptide hormone which can easily
pass cell membrane to interact with hormone receptor complex.

View answer and explanation

Correct option: C

If Assertion is true but Reason is false

Option C is correct because the assertion is true (insulin regulates gene expression), but the reason is false (insulin, being a peptide hormone, cannot directly pass through the cell membrane).

183 Medium

183 of 198

Application +4 | -1

A female is having excessive weight gain in spite of having adequate balance diet. She also complains of fatigue and tiredness. Her menstrual cycle is also irregular since past few months. Which of the following condition is she suffering from?

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Correct option: B

Hypothyroidism

Option B (Hypothyroidism) is correct because weight gain, fatigue, tiredness, and irregular menstrual cycles are common symptoms of hypothyroidism.

184 Medium

184 of 198

Remembering +4 | -1

Congenital removal of thyroid will cause

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Correct option: B

Cretinism

Option B is correct because congenital removal of the thyroid gland results in cretinism, a condition characterized by stunted growth and mental retardation in children.

185 Medium

185 of 198

Understanding +4 | -1

Androgens act on the …A… and influence the male sexual behavior called …B… . These hormones produce …C… effect on protein and carbohydrate metabolism. Choose the correct combination of A, B and C

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Correct option: C

A-CNS, B-libido, C-anabolic

Option C (A-CNS, B-libido, C-anabolic) is correct because androgens act on the central nervous system (CNS), influence libido (sexual desire), and have an anabolic effect on protein metabolism.

186 Medium

186 of 198

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.

187 Medium

187 of 198

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.

188 Medium

188 of 198

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.

189 Medium

189 of 198

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.

190 Medium

190 of 198

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.

191 Medium

191 of 198

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.

192 Medium

192 of 198

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.

193 Medium

193 of 198

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.

194 Medium

194 of 198

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.

195 Medium

195 of 198

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.

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196 Medium

196 of 198

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.

View answer and explanation

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.

197 Medium

197 of 198

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.

198 Medium

198 of 198

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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