Quiz - biology - Chemical Coordination-A & R questions

Q1. Assertion: Destruction of the neurohypophysis without affecting the hypothalamus can lead to diuresis.
Reason: Antidiuretic hormone (ADH) is released from the neurohypophysis. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q2. Assertion: GnRH (Gonadotropin-releasing hormone) stimulates the pituitary to secrete its gonadotropins.
Reason: The hypothalamus promotes the pituitary to secrete its hormones by releasing hormones. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q3. Assertion: Somatostatin is an inhibitory hormone that reaches the neurohypophysis gland through blood circulation.
Reason: The hypothalamus secretes only inhibitory hormones. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q4. Assertion: Oxytocin is responsible for childbirth and milk ejection from the mammary glands.
Reason: Oxytocin acts on smooth muscles and stimulates their contraction. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q5. Assertion: The posterior lobe of the pituitary gland secretes oxytocin.
Reason: Oxytocin is formed in the hypothalamus and is also called a neurohormone. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q6. Assertion: Amino acid derivative hormones bind to receptors present on the cell membrane.
Reason: A hormone-receptor complex is essential to show their effect on the target tissue. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q7. Assertion: The daily diurnal rhythm of our body is regulated by the melatonin hormone.
Reason: Melatonin is an antagonistic hormone to MSH. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q8. Assertion: A person during an interview feels a dry mouth.
Reason: This condition-induced stress leads to the release of emergency hormones. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q9. Assertion: Follicles of the thyroid are situated in the stromal part.
Reason: Ovarian follicles mature in the stroma of the ovary. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q10. Assertion: The thyroxine hormone regulates the BMR (Basal Metabolic Rate) of the body.
Reason: It synthesizes its follicular hormone in the presence of iodine. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q11. Assertion: Calcium is essential for heart function and synaptic transmission.
Reason: A lack of iodine affects the calcium level in the body. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q12. Assertion: Hypothyroidism during pregnancy causes defective development and maturation of the growing baby.
Reason: Growth hormone is essential for the proper growth of the baby. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

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

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q13. Assertion: The thymus gland is a lobular structure located on the ventral side of the aorta.
Reason: All types of lymphocytes mature in the thymus to provide immunity to the body. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q14. Assertion: Glucocorticoids stimulate gluconeogenesis.
Reason: Adrenaline is secreted during stress and inhibits alimentary canal functions. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

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

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q15. Assertion: The adrenal medulla is ectodermal in origin.
Reason: The adrenal medulla is a modified sympathetic ganglion. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q16. Assertion: A decrease in blood pressure stimulates the secretion of mineralocorticoids.
Reason: Blood volume and electrolytes must be properly maintained by aldosterone to maintain blood pressure. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q17. Assertion: Insulin is a hypoglycemic hormone.
Reason: Prolonged hyperglycemia leads to a complex disorder called diabetes mellitus, which can be associated with the loss of glucose through urine. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q18. Assertion: Androgen is a catabolic hormone.
Reason: Androgen is secreted from seminiferous tubes. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q19. Assertion: ANF is secreted from the heart to decrease blood pressure.
Reason: Nor-adrenaline influences blood pressure. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q20. Assertion: The posterior pituitary is under the direct neural regulation of the hypothalamus.
Reason: Oxytocin and vasopressin are actually synthesized by the hypothalamus and are transported axonally to the neurohypophysis. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q21. Assertion: Deficiency of iodine in our diet results in hypothyroidism and enlargement of the thyroid gland called simple goitre.
Reason: Iodine is essential for the normal rate of hormone synthesis in the thyroid. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q22. Assertion: Cortisol can be used in the treatment of allergic diseases and inflammatory diseases.
Reason: Cortisol produces an anti-inflammatory reaction and suppresses the immune response. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q23. Assertion: Hormones produce their effects on target tissues by binding to specific receptors.
Reason: Steroid hormones interact with intracellular receptors and regulate gene expression. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q24. Assertion: Hormones are also secreted by some tissues which are not endocrine glands.
Reason: Hormones are intercellular messengers and are also produced by ducted glands where they are transported up to their target organs through ducts. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q25. Assertion: The thymus gland is a lobular structure located between lungs behind the sternum and on the ventral side of the aorta.
Reason: The thymus secretes the thymosin hormone that plays a major role in the differentiation of T-lymphocytes. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q26. Assertion: Parathormone increases the calcium level in blood (hypercalcemic hormone).
Reason: PTH withdraws calcium from bones. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q27. Assertion: Glucagon is a hyperglycemic hormone.
Reason: Glucagon decreases cellular uptake and use of glucose, therefore blood sugar increases. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q28. Assertion: Vasopressin is called as an anti-diuretic hormone.
Reason: Vasopressin decreases the loss of water in urine by reabsorbing water and ions in the DCT. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q29. Assertion: Mineralocorticoid (Aldosterone) is a hormone of the adrenal cortex.
Reason: The secretion of mineralocorticoid is not controlled by ACTH. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q30. Assertion: Steroid hormones like cortisol and androgen directly send their information to the nucleus.
Reason: Steroid hormones are lipid-soluble and can therefore cross through the plasma membrane. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q31. Assertion: Atrial natriuretic factor is a peptide secreted from the wall of the right atrium.
Reason: ANF is a vasodilator and decreases blood pressure. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q32. Assertion: Thymosine hormone is important for the immune system.
Reason: Thymosine causes the differentiation of T-lymphocytes, which is important for cell-mediated immunity. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q33. Assertion: Glucagon acts faster than progesterone.
Reason: Glucagon acts through a secondary messenger, while progesterone acts on a gene. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q34. Assertion: The thyroid gland synthesizes $$T_{4}$$ (thyroxine) and triiodothyronine ($$T_{3}$$).
Reason: Hyposecretion of thyrocalcitonin causes simple goitre. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q35. Assertion: Growth hormone (GH) stimulates the growth of the body and cell division.
Reason: Hyposecretion of GH causes dwarfism as well as acromegaly. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q36. Assertion: Oxytocin is produced by the hypothalamus and stored in the posterior pituitary.
Reason: Oxytocin causes contractions in uterine muscles and also causes the ejection of milk from the mammary glands. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q37. Assertion: Melanocyte Stimulating Hormone (MSH) is secreted from the same gland which secretes melatonin.
Reason: Melatonin causes the darkening of the skin. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q38. Assertion: The glucose homeostasis in blood is maintained jointly by insulin and glucagon.
Reason: Glucagon increases the cellular glucose uptake and utilization. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q39. Assertion: Estrogen regulates female sexual behavior.
Reason: Progesterone supports pregnancy. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q40. Assertion: When blood pressure is increased, atrial natriuretic factor (ANF) is secreted from the atrial wall of the heart.
Reason: ANF causes the dilation of blood vessels and decreases blood pressure. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q41. Assertion: The secretion of parathyroid hormone is regulated by the circulating levels of calcium ions.
Reason: Parathyroid hormone is a hypocalcemic hormone. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q42. Assertion: Catecholamines are secreted from the adrenal cortex.
Reason: These hormones decrease alertness. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q43. Assertion: The pineal gland is located on the dorsal side of the forebrain.
Reason: Melatonin influences metabolism, pigmentation, the menstrual cycle, and our defense. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q44. Assertion: In adult women, hypothyroidism may cause the menstrual cycle to become irregular.
Reason: The maintenance of water and electrolyte balance is also influenced by thyroid hormones. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q45. Assertion: Water-soluble hormones do not enter the cell but generate second messengers.
Reason: Water-soluble hormones have membrane-bound receptors. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Loading...

Biology - Chemical Coordination-A & R questions

Loading...

Biology - Chemical Coordination-A & R questions

Image Preview