NEET Biology MCQs Chemical Coordination [Free PDF]

NEET Biology MCQs Chemical Coordination – Questions

  1. Androgens regulates
    a) Development of accessory sex organs b) Muscular growth
    c) Maturation of accessory sex organs d) All of the above
  2. Progesterone hormone is secreted by
    a) Corpus albicans b) Corpus callosum
    c) Corpus luteum in ovaries d) Corpus uteri
  3. Injury to adrenal cortex is not likely to affect the secretion of which one of the following?
    a) Aldosterone
    b) Both androstenedione and dehydroepiandrosterone
    c) Adrenaline
    d) Cortisol
  4. Hormones are non-nutrient chemicals, which acts as…….. messengers and are produced in trace amount
    a) Intercellular b) Intracellular c) Extracellular d) None of these
  5. Insulin receptors are
    a) Extrinsic protein b) Intrinsic protein c) G – protein d) Trimeric protein
  6. Choose the correct option for A to D
    Types of cells
    (Langerhans)
    Hormones
    α – cells secrete 𝐴
    β – cells secrete 𝐵
    γ – cells secrete 𝐶
    δ – cells secrete 𝐷 a) A-Glucagon, B-Insulin, C-Gastrin, D-Somatostatin
    b) A-Insulin, B-Glucagon, C-Gastrin, D-Somatostatin
    c) A-Insulin, B-Glucagon, C-Somatostatin, D-Gastrin
    d) A-Glucagon, B-Insulin, C-Somatostatin, D-Gastrin
  7. ‘GIP’ stimulates the release of
    a) Glucagon b) Insulin c) Calcitonin d) Thyrocalcitonin
  8. The thyroid gland is composed of …A… lobes which are located on either side of the …B… the lobes are
    interconnected with a thin flap of connective tissue called …C…
    Select the correct combination for A, B and C
    a) A-3, B-trachea, C-isthmus b) A-4, B-trachea, C-isthmus
    c) A-2, B-trachea, C-isthmus d) A-1, B-trachea, C-isthmus
  9. Some hormone need the secondary messenger, because
    a) They need activator b) They can’t cross cells membrane
    c) They can cross cells membrane d) They need a prosthetic group
  10. Sex hormones can work without the help of
    a) Insulin b) Placenta c) Pituitary d) gonadotropins
  11. Estrogen
    a) Stimulate the growth of ovarian follicle b) Stimulate the appearance of secondary sex
    characters
    c) Stimulate the growth of mammary gland d) All of the above

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  1. In human adults females, oxytocin
    a) Is secreted by anterior pituitary
    b) Stimulates growth of mammary glands
    c) Stimulate pituitary to secrete vasopressin
    d) Causes strong uterine contractions during parturition
  2. The hormone that increases the blood calcium level and decreases its excretion by kidney is
    a) Parathormone b) Calcitonin c) Thyroxine d) Insulin
  3. Gastrointestinal hormones are
    a) Steroidal in nature b) Proteinaceous in nature
    c) Glycoproteinaceous in nature d) Both (a) and (b)
  4. I. Glucagon
    II. Epinephrine
    III. Steroid hormone
    IV. Idothyronine
    Among the given hormones which needs secondary messenger
    a) I and III b) III and IV c) I and II d) IV and I
  5. A steroid hormone which regulates glucose metabolism is
    a) Cortisol b) Corticosterone
    c) 11- deoxycorticosterone d) Cortisone
  6. 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
    a) A-oxytocin; B-prolactin b) A-prolactin; A-oxytocin
    c) A-prolactin; B-prolactin d) A-oxytocin; B-prolactin
  7. Feeling the tremors of an earthquake, a scared resident of seventh floor of a multistoreyed building starts
    climbing down the stairs rapidly. Which hormone initiates this action?
    a) Thyroxine b) Adrenaline c) Glucagon d) Gastrin
  8. Endocrine glands are
    a) Ductless glands whose secretions pour directly into blood
    b) Have ducts and pour their secretions into blood directly
    c) Have ducts which straightway pour secretions into target organs
    d) All of the above
  9. Pheromones are also called
    I. ectohormones
    II. sex attractants
    III. semichemicals
    The correct option is
    a) I and III b) I and III c) I, II and III d) II and III
  10. Sertoli cells are regulated by the pituitary hormone known as
    a) FSH b) GH c) Prolactin d) LH
  11. Which of the following is gastrointestine hormone?
    a) Prolactin b) Enterogastrone c) GH d) FSH
  12. Islets of Langerhans is a normal human pancreas comprise only
    a) 2-3% of pancreatic tissue b) 1-2% of pancreatic tissue
    c) 3-4% of pancreatic tissue d) 4-5% of pancreatic tissue
  13. Which is the function of norepinephrine?
    a) Increase blood pressure b) Urine formation
    c) Increase secretion of adrenaline d) None of the above
  14. Correct order of action of hydrophilic hormones
    I. Hormones bind to plasma membrane

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II. Physiological response
III. Biochemical response
IV. Generation of secondary messenger
Choose the correct option
a) I, II, III, IV b) II, I, III, IV c) I, IV, III, II d) III, I, II, IV

  1. To yield more milk, cow is injected with
    a) Sorbitol b) Prolactin c) Gonadotrophs d) Sterol
  2. FSH (Follicle stimulating hormone) is produced by
    a) Adrenal cortex b) Anterior pituitary lobe
    c) Middle pituitary lobe d) Posterior pituitary lobe
  3. Calcium level decreases in the blood due to hyposecretion of
    a) Parathyroid hormone b) Calcitonin c) Thyroxine d) Adrenaline
  4. I. Somatostatin inhibits intestinal absorption of glucose
    II. Leydig’s cell secrete progesterone
    III. Melatonin is secreted by pineal gland
    IV. Myxoedema is a thyroid disorder
    V. Neurohypophysis secreted ACTH
    Select the correct statements and choose the option
    a) I, III and IV b) II, III and V c) I, IV and V d) II, IV and V
  5. Hypothyroidism causes
    a) Myxoedema b) Cretinism c) Both (a) and (b) d) Exophthalmic goitre
  6. Which one of the following is not an endocrine gland?
    a) Kidney b) Thyroid c) Adrenal d) Pituitary
  7. Pituitary gland is derived from
    a) Ectoderm b) Endoderm c) Mesoderm d) None of these
  8. ‘ANF’ is secretes by
    a) Venous wall of heart b) Atrial wall of heart c) Both (a) and (b) d) None of these
  9. Tyrosine is the precursor of
    a) Adrenaline b) Noradrenaline c) Testosterone d) Both (a) and (b)
  10. Which one of the following four glands is correctly matched with the accompanying description?
    a) Thyroid — Hyperactivity in young children cause cretinism
    b) Thymus — Starts undergoing atrophy after puberty
    c) Parathyroid — Secretes parathormone, which promotes movements of
    Calcium ions from blood into bones during calcification
    d) Pancreas — Delta cells of islets of Langerhans secrete a hormone, which
    Stimulates glycolysis in liver
  11. Generally the steroid hormones are derived from
    a) Proteins b) Carbohydrates c) Cholesterol d) Glycoprotein
  12. Which hormone causes dilation of blood vessels, increased oxygen consumption and glycogenolysis?
    a) ACTH b) Insulin c) Adrenaline d) Glucagon
  13. In Cushing’s syndrome, there is
    a) An increase in blood glucose level b) Hypertrophy of the skeletal muscles
    c) A fall in plasma cortisol d) A thickening of the skin
  14. Progesterone is secreted by
    a) Corpus luteum b) Uterus c) Placenta d) Graafian follicle
  15. Thymus gland releases …… hormone
    a) T4 b) T3 c) Thymosins d) TCT
  16. Endemic goitre is state of
    a) Increased thyroid function b) Normal thyroid function
    c) Decreased thyroid function d) Moderate thyroid function

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  1. ‘Tyrosine’ is important in the formation of
    I. T3 II. T4
    III. Oxytocin IV. PRL
    Select the correct combination
    a) I and II b) II and III c) IV and I d) III and I
  2. 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
    a) A-ventral, B-heart, C-immune b) A-lateral, B-kidney, C-circulatory
    c) A-dorsal, B-heart, C-immune d) A-dorsal, B-parathyroid, C-circulatory
  3. Resorption of water and electrolytes by distal tubules of kidney and thereby diuresis reducing the loss of
    water through urine (diuresis) is done by
    a) Oxytocin b) Vasopressin c) FSH d) LH
  4. Which hormone produces calorigenic effect?
    a) Thyroxine b) FSH c) Insulin d) All of these
  5. I. Hormones are non-nutrient chemicals
    II. Hormones act as intracellular chemicals
    III. Hormones are produced in moderate quantity
    IV. Hormones may be proteins, steroids, glycoproteins or biogenic amines
    Choose the option with written above correct statements
    a) I and II b) II and III c) III and IV d) I and IV
  6. The thyroid gland is composed of
    a) Follicles b) Stromal tissue c) Trachea d) Both (a) and (b)
  7. Which one of the following endocrine glands functions as a biological clock and a neurosecretory
    transducer?
    a) Adrenal gland b) Thyroid gland c) Pineal gland d) Thymus gland
  8. An adenohypophysis hormone, which is regulated by feedback mechanism is
    a) Oxytocin b) TSH c) Vasopressin d) Cortisone
  9. A person is having problems with calcium and phosphorus metabolism in his body. Which one of the
    following glands may not be functioning properly?
    a) Parathyroid b) Parotid c) Pancreas d) Thyroid
  10. Which gland is called 4S and 3F?
    a) Thyroid gland b) Parathyroid gland c) Adrenal gland d) Hypothalamus
  11. Secretion is under control of neurosecretory nerve axons in
    a) Pineal gland b) Adrenal cortex c) Anterior pituitary d) Posterior pituitary
  12. Insulin is
    a) Hypoglycemic hormone b) Decreases the blood sugar
    c) Act on adipose tissue and hepatocytes d) All of the above
  13. Which one is not a placental hormone?
    a) HCG b) HCS c) Progesterone d) Melatonin
  14. Largest endocrine gland is
    a) Pituitary b) Adrenal c) Thyroid d) Pineal
  15. GnRh (Gonadotropin Releasing Hormone) stimulates the
    a) Pituitary to release the gonadotropin
    b) Pituitary for synthesis and release of gonadotropin
    c) Testis to release the gonadotropin
    d) Hypothalamus to release the gonadotropin
  1. Hyposecretion of which of the following can cause diabetes insipidus?
    a) Insulin b) Thyroxine c) Glucagon d) ADH
  2. Gigantism and dwarfism are the disease related to
    a) Prolactin hormone of mammary gland b) Growth hormone of adenohypophysis
    c) Luteinising hormone of pituitary gland d) Thyroid stimulating hormone of thyroid
  3. The function of pineal body is to
    a) Lighten the skin colours b) Control sexual behavior
    c) Regulate the period of puberty d) All of the above
  4. The cause of cretinism is
    a) Hypothyroidism b) Hypoparathyroidism
    c) Hyperthyroidism d) Hyperparathyroidism
  5. Hyposecretion of growth hormone causes
    a) Dwarfism b) Cretinism c) Myxoedema d) Acromegaly
  6. The decline and disappearance of …… gland by the middle age is primary cause of ageing
    a) Thyroid b) Thymus c) Adrenal d) Parathyroid
  7. Study the given flow chart and, identify 𝐴,𝐵,𝐶,𝐷 and 𝐸 a) A-Cortex, B-Medulla, C-Zona glomerulosa, D-Zona reticulata, E-Zona fasciculata
    b) A-Cortex, B-Medulla, C-Zona glomerulosa, D-Zona fasciculata, E-Zona reticulata
    c) A-Medulla, B-Cortex, C-Zona glomerulosa, D-Zona fasciculata, E-Zona reticulata
    d) A-Medulla, B-Cortex, C-Zona glomerulosa, D-Zona reticulata, E-Zona fasciculata
  8. Which of the following hormones are secreted by pancreas?
    a) Insulin and glucagon b) Epinephrine and norepinephrine
    c) Thyroxine and melanin d) Lactocin and oxytocin
  9. Father of Endocrinology is
    a) Huxley b) Thomas Addison c) Abel d) Kimball and Murlin
  10. Which of the following is correct
    a) Leukaemia – Skin cancer b) Diabetes – Sugar free
    c) Rheumatic fever – Defective pacemaker d) Heart attack – Radiation therapy
  11. Which of the following hormones is not a secretary product of human placenta?
    a) Human chorionic gonadotrophin b) Prolactin
    c) Oestrogen d) Progesterone

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  1. Name the hormone 𝑋
    a) PTH b) Adrenal hormone c) Both (a) and (b) d) ACTH
  2. Molecule that bind the receptor and induces cell the post-receptor events is called …A… and molecule that
    bind to the receptor and inhibit all the post-receptor events is called …B….
    a) A-antagonist, B-agonist b) A-agonist, B-enzyme
    c) A-antagonist, B-hormone d) A-agonist, B-antagonist
  3. In males, the spermatogenesis is regulated by
    a) FSH b) Androgens c) Both (a) and (b) d) Hypothalamus
  4. Hormone is a/an
    a) Enzyme b) Chemical messenger
    c) Excretory product d) Glandular secretion
  5. Chemically hormones are
    a) Biogenic amines only b) Proteins, steroids and biogenic amines
    c) Proteins only d) Steroids only
  6. MSH is produced by
    a) Thyroid b) Anterior pituitary c) Posterior pituitary d) Pars intermedia
  7. The hormone oxytocin and vasopressin are secreted by
    a) Neurohypophysis b) Adenohypophysis c) Hypothalamus d) Adrenal medulla
  8. 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
    a) A-PNS, B-libido, C-catabolic b) A-ANS, B-libido, C-catabolic
    c) A-CNS, B-libido, C-anabolic d) A-CNS, B-libido, C-catabolic
  9. Which accessory genital gland occurs only in mammalian male?
    a) Prostate gland b) Perineal gland c) Cowper’s gland d) Bartholin gland
  10. Decrease in the calcium level in blood is caused by
    a) Prolactin b) Calcitonin c) Adrenocorticotrophin d) Oxytocin
  11. Which of the following vitamins has some physiological effects similar to those of parathormone?
    a) Vitamin- A b) Vitamin- D c) Vitamin- C d) Vitamin- B
  12. 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
    a) I, II and III b) II, III and IV c) I, III and IV d) I, II, III and IV
  13. Glucagon is secreted by
    a) Adrenal medulla b) β-cells of islets of Langerhans
    c) α-cells of islets of Langerhans d) Adrenal cortex
  14. Which of the following is the function of adrenaline?
    a) Helps in gastric juice secretion b) Increase heart rate and blood pressure
    c) Increase blood calcium d) Helps in milk secretion
  15. Pineal gland of human brain secretes melatonin concerned with
    a) Anger b) Body temperature c) Colouration of skin d) Sleep
  16. Islets of Langerhans are found in
    a) Anterior pituitary b) Kidney cortex c) Spleen d) Endocrine pancrea

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