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NEET • BIOLOGY • CHEMICAL COORDINATION AND INTEGRATION

Chemical coordination and integration practice · Mixed difficulty

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Showing 331-360 of 381 questions

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331 Easy
331 of 381
Remembering +4 | -1
Endocrine glands are
View answer and explanation
Correct option: A
Ductless glands whose secretions pour directly into blood
The correct answer is A (Ductless glands whose secretions pour directly into blood) because endocrine glands are defined by their lack of ducts and direct secretion into the bloodstream.
332 Medium
332 of 381
Understanding +4 | -1
Progesterone
View answer and explanation
Correct option: C
Both (a) and (b)
Option C (Both (a) and (b)) is correct because progesterone supports pregnancy and stimulates alveoli formation in mammary glands.
333 Medium
333 of 381
Understanding +4 | -1
Consider the following statements about glucocorticoids. a. They stimulate gluconeogenesis and lipolysis b. They produce inflammatory reactions and suppresses the immune system c. They stimulate RBC production d. They promote cellular uptake and utilization of amino acids.  How many of the above statements are correct?
View answer and explanation
Correct option: C
2
Option C (2) is correct because glucocorticoids stimulate gluconeogenesis and lipolysis, and stimulate RBC production, but they suppress, not produce, inflammatory reactions and do not promote cellular uptake of amino acids.
334 Medium
334 of 381
Remembering +4 | -1
The hormone that is not involved during the process of child birth is
View answer and explanation
Correct option: C
progesterone
Option C (progesterone) is correct because while estrogen, cortisol, and oxytocin play roles in childbirth, progesterone levels typically decrease before labor begins.
335 Easy
335 of 381
Remembering +4 | -1
Which one of the following hormone is a modified amino acid?
View answer and explanation
Correct option: A
Epinephrine
Option A is correct because epinephrine (adrenaline) is derived from the amino acid tyrosine.
336 Easy
336 of 381
Remembering +4 | -1
Pair of ovary located …… of female (human)
View answer and explanation
Correct option: B
Inside the abdomen
Option B (Inside the abdomen) is correct because the ovaries are located within the abdominal cavity in human females.
337 Medium
337 of 381
Remembering +4 | -1
I. The adrenal cortex secretes many hormones called corticoids , II. Corticoids involved in carbohydrate metabolism are called glucocorticoids,  III. Cortisol is main glucocorticoids,  IV. Aldosterone is the main mineralocorticoids.  Select the correct combination from the given options
View answer and explanation
Correct option: D
I, II, III and IV
Option D is correct because all the statements are true regarding the adrenal cortex and its hormones.
338 Hard
338 of 381
Understanding +4 | -1
Select the correct matching :
View answer and explanation
Correct option: C
Thymosin – Promotes production of
antibodies to provide humoral immunity also
The correct answer is C because Thymosin promotes the production of antibodies, which is a key component of humoral immunity.
339 Easy
339 of 381
Remembering +4 | -1
The hormone that increases the blood calcium level and decreases its excretion by kidney is
View answer and explanation
Correct option: A
Parathormone
Option A (Parathormone) is correct because parathormone increases blood calcium levels and decreases calcium excretion by the kidneys.
340 Easy
340 of 381
Understanding +4 | -1
Selective destruction of the zona glomeruiosa of the adrenal cortex would cause a deficiency of which hormone?
View answer and explanation
Correct option: A
Aldosterone
Option A (Aldosterone) is correct because the zona glomerulosa is the primary site of aldosterone production in the adrenal cortex.
341 Hard
341 of 381
Understanding +4 | -1
The same peptide hormone will show variation in response to different cells because
View answer and explanation
Correct option: B
a target cells' response is determined by the components of its signal transduction pathways
Option B (a target cells' response is determined by the components of its signal transduction pathways) is correct because different cells have different intracellular signaling components that determine the response to the same hormone.
342 Easy
342 of 381
Remembering +4 | -1
Accumulation and release centre of pituitary gland hormones is
View answer and explanation
Correct option: C
Hypothalamus
The correct answer is Hypothalamus because it synthesizes and releases hormones that control the pituitary gland's hormone release.
343 Medium
343 of 381
Understanding +4 | -1
A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?
View answer and explanation
Correct option: A
Parathyroid
Option A (Parathyroid) is correct because the parathyroid gland regulates calcium and phosphorus metabolism through parathyroid hormone (PTH).
344 Medium
344 of 381
Understanding +4 | -1
The increased basal metabolic rate in humans is mainly the result of abnormality in which of the following gland?
View answer and explanation
Correct option: B
Thyroid
The correct answer is B (Thyroid) because the thyroid gland secretes hormones (T3 and T4) that directly regulate the basal metabolic rate.
345 Easy
345 of 381
Understanding +4 | -1
Which of the following statements is correct regarding hypothalamic control of pituitary function?
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Correct option: A
All the hypothalamic hormones are synthesized and secreted by neurons
The correct answer is A (All the hypothalamic hormones are synthesized and secreted by neurons) because hypothalamic hormones are neurohormones.
346 Medium
346 of 381
Understanding +4 | -1
A person passes much urine and drinks much water but his blood glucose level is normal. This condition may be the result of
View answer and explanation
Correct option: B
A reduction in vasopressin secretion from posterior pituitary
Option B (A reduction in vasopressin secretion from posterior pituitary) is correct because vasopressin (ADH) regulates water reabsorption in the kidneys, and its deficiency leads to excessive urine production and thirst (diabetes insipidus) without affecting blood glucose levels.
347 Easy
347 of 381
Remembering +4 | -1
GIP (Gastric Inhibitory Peptide)
View answer and explanation
Correct option: A
Inhibits the gastric secretion and motility
Option A (Inhibits the gastric secretion and motility) is correct because GIP (Gastric Inhibitory Peptide) reduces gastric acid secretion and slows down gastric emptying.
348 Easy
348 of 381
Understanding +4 | -1
Major roles of thymus gland in humans is/are
View answer and explanation
Correct option: D
Both (a) and ©
The correct answer is D (Both (a) and (c)) because the thymus gland is responsible for the differentiation of T-lymphocytes and promotes the production of antibodies.
349 Easy
349 of 381
Understanding +4 | -1
Each receptor is …A… to one hormone only and hence, receptors are …B… . Hormone receptor complex formation leads to certain biochemical changes in the …C… . Choose the option containing correct combination of A, B and C
View answer and explanation
Correct option: B
A-specific, B-specific, C-target tissue
Option B (A-specific, B-specific, C-target tissue) is correct because each receptor is specific to one hormone, and the hormone-receptor complex affects the target tissue.
350 Hard
350 of 381
Remembering +4 | -1
The blood glucose level is commonly expressed as:
View answer and explanation
Correct option: B
milligram per deci litre
Option B (milligram per deci litre) is correct because blood glucose levels are commonly expressed in mg/dL.
351 Easy
351 of 381
Remembering +4 | -1
Gluconeogenesis, lipolysis and proteolysis processes are stimulated by
View answer and explanation
Correct option: A
Glucocorticoids
Option A is correct because glucocorticoids, such as cortisol, stimulate gluconeogenesis, lipolysis, and proteolysis to increase blood glucose levels.
352 Hard
352 of 381
Understanding +4 | -1
Arrange the sequence of action of work of FSH?

(a) Binding to membrane receptor

(b) Biochemical response

(c) Generation of second messenger

(d) Physiological response (e.g.,Ovarian growth)
View answer and explanation
Correct option: B
(a) → (c) → (b) → (d)
Option B ((a) → (c) → (b) → (d)) is correct because FSH, being a peptide hormone, first binds to the membrane receptor, generates a second messenger, then causes a biochemical response, and finally a physiological response.
353 Medium
353 of 381
Remembering +4 | -1
Androgens are secreted under the stimulation of
View answer and explanation
Correct option: B
Luteinizing hormone
Option B (Luteinizing hormone) is correct because LH stimulates Leydig cells in the testes to produce androgens like testosterone.
354 Medium
354 of 381
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).
355 Medium
355 of 381
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?
View answer and explanation
Correct option: B
Hypothyroidism
Option B (Hypothyroidism) is correct because weight gain, fatigue, tiredness, and irregular menstrual cycles are common symptoms of hypothyroidism.
356 Easy
356 of 381
Understanding +4 | -1
Which of the following is the correct function of endocrine system with reference to chemical coordination?
View answer and explanation
Correct option: B
Provides chemical integration through hormones
Option B (Provides chemical integration through hormones) is correct because the endocrine system uses hormones for chemical coordination.
357 Medium
357 of 381
Remembering +4 | -1
Congenital removal of thyroid will cause
View answer and explanation
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.
358 Easy
358 of 381
Understanding +4 | -1
The activity of formation of milk is regulated by the activity of …A… . While the ejection of milk is controlled by …B… hormone
Here, A and B refers to
View answer and explanation
Correct option: B
A-prolactin; A-oxytocin
Option B (A-prolactin; A-oxytocin) is correct because prolactin stimulates milk production, while oxytocin stimulates milk ejection.
359 Medium
359 of 381
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
View answer and explanation
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.
360 Easy
360 of 381
Analyzing +4 | -1
Select the mismatch among the following w.r.t. disorders associated with endocrine glands.
View answer and explanation
Correct option: A
Addison's disease - Underproduction of hormones by adrenal medulla
Option A (Addison's disease - Underproduction of hormones by adrenal medulla) is the mismatch because Addison's disease involves the adrenal cortex, not the medulla.
Revision notes and key takeaways

Review CHEMICAL COORDINATION AND INTEGRATION in your textbook or class notes, then use this set to check your understanding.

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