NCERT BASED MCQs For NEET UG -2024

1. Which of the following best defines hormones?
   (a) Nutrient chemicals acting as intercellular messengers
   (b) Trace amounts of non-nutrient chemicals acting as intercellular messengers
   (c) Nutrient chemicals released into the blood for intercellular communication
   (d) Large quantities of non-nutrient chemicals released into the blood
2. What is the function of inhibiting hormones produced by the hypothalamus?
   (a) Stimulating secretion of pituitary hormones
   (b) Inhibiting secretion of pituitary hormones
   (c) Regulating the synthesis of pituitary hormones
   (d) Enhancing the release of pituitary hormones
3. Which hormone is responsible for stimulating the synthesis and release of gonadotrophins from the pituitary?
   (a) Somatostatin
   (b) Growth hormone
   (c) Gonadotrophin releasing hormone (GnRH)
   (d) Oxytocin Answer:
4. The hormones oxytocin and vasopressin are synthesized by which gland?
   (a) Adrenal cortex
   (b) Thyroid gland
   (c) Hypothalamus
   (d) Pituitary gland
5. Excess secretion of growth hormone in adults can lead to which condition?
   (a) Gigantism
   (b) Pituitary dwarfism
   (c) Acromegaly
   (d) Diabetes insipidus
6. Which hormone regulates the growth of mammary glands and milk formation?
   (a) Growth hormone
   (b) Prolactin
   (c) Thyroid stimulating hormone (TSH)
   (d) Adrenocorticotrophic hormone (ACTH)
7. What is the function of TSH?
   (a) Regulating growth hormone secretion
   (b) Stimulating thyroid hormone synthesis and secretion
   (c) Inhibiting growth hormone secretion
   (d) Stimulating adrenal cortex hormone synthesis
8. LH and FSH are known as:
   (a) Gonadotrophins
   (b) Thyrotrophins
   (c) Corticotrophins
   (d) Melanotrophins
9. In males, LH stimulates the synthesis and secretion of:
   (a) Thyroid hormones
   (b) Androgens
   (c) Estrogens
   (d) Prolactin
10. What is the primary function of FSH in females?
    (a) Inducing ovulation
    (b) Stimulating adrenal cortex
    (c) Regulating milk formation
    (d) Stimulating growth hormone secretion
11. MSH acts on which cells in the body?
    (a) Thyroid cells
    (b) Adrenal cortex cells
    (c) Melanocytes
    (d) Smooth muscle cells
12. Which hormone stimulates contraction of smooth muscles during childbirth?
    (a) Oxytocin
    (b) Vasopressin
    (c) Growth hormone
    (d) Prolactin
13. What is another name for vasopressin?
    (a) Thyroid stimulating hormone (TSH)
    (b) Adrenocorticotrophic hormone (ACTH)
    (c) Oxytocin
    (d) Anti-diuretic hormone (ADH)
14. Impairment in the synthesis or release of ADH leads to which condition?
    (a) Gigantism
    (b) Acromegaly
    (c) Diabetes insipidus
    (d) Pituitary dwarfism
15. Where is the pituitary gland located?
    (a) In the adrenal cortex
    (b) In the thyroid gland
    (c) In a bony cavity called sella tursica
    (d) Attached to the pancreas
16. What are the two portions of the adenohypophysis?
    (a) Pars nervosa and pars intermedia
    (b) Pars distalis and pars nervosa
    (c) Pars distalis and pars intermedia
    (d) Pars intermedia and pars nervosa
17. Which hormone is primarily responsible for stimulating growth hormone secretion?
    (a) Somatostatin
    (b) Prolactin
    (c) Growth hormone releasing hormone (GHRH)
    (d) Melanocyte stimulating hormone (MSH)
18. What is the function of ACTH?
    (a) Stimulating adrenal cortex hormone synthesis
    (b) Regulating thyroid hormone secretion
    (c) Inducing ovulation
    (d) Stimulating milk formation
19. What is the main function of oxytocin in females?
    (a) Regulating growth
    (b) Inducing ovulation
    (c) Stimulating milk ejection
    (d) Regulating pigmentation
20. Which gland regulates the synthesis and release of pituitary hormones?
    (a) Thyroid gland
    (b) Hypothalamus
    (c) Adrenal gland
    (d) Pancreas