Biology ยท General Awareness
Human Endocrine System
1,530 Questions
The human endocrine system comprises glands that secrete hormones to regulate bodily functions like metabolism, growth, and reproduction. Competitive exams frequently test the specific roles of hormones such as adrenaline, insulin, and progesterone. Use these questions to master the locations and functions of different hormones.
Hormone functionsIslets of LangerhansFight or flight responseBlood pressure regulationFemale sex hormonesWater soluble hormones
Human Endocrine System Questions
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Alpha cells on islets of Langerhans
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Beta cells of islets of Langerhans
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Adrenal cortex
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Adrenal medulla
A
Correct answer
Explanation
Alpha cells of islets of Langerhans secrete a hormone that stimulate glycogenolysis, gluconeogenesis and glucose released by the liver.
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Alpha cells of islets of Langerhans
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Beta cells of islets of Langerhans
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Delta cells of islets of Langerhans
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Gamma cells of islets of Langerhans
C
Correct answer
Explanation
Delta cells of islets of Langerhans produce somatostatin.
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Alpha cells
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Beta cells
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Gamma cells
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Epsilon cells
D
Correct answer
Explanation
Epsilon cells produce ghrelin hormone. Less than 1% cells of islets of Langerhans are epsilon cells.
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Thyroxine
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Thyrocalcitonin
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Triiodothyronine (T3)
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Parathormone
B
Correct answer
Explanation
Thyrocalcitonin acts mainly on bones causing inhibition of bone resorption in young ones.
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Thyroxine
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Triiodothyronine
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Thyrocalcitonin
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Parathormone
C
Correct answer
Explanation
Thyrocalcitonin is secreted by parafollicular cells of the thyroid gland.
B
Correct answer
Explanation
T4 contains 65% iodine. It has the highest amount of iodine.
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pituitary gland
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thyroid gland
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hypothalamus
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parathyroid gland
C
Correct answer
Explanation
TRH is produced by hypothalamus and it stimulates the release of TSH from the pituitary gland.
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Thyroxine
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Parathormone
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Thymosin
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Serotonin
B
Correct answer
Explanation
Parathormone maintains the required level of Ca in the blood.
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Oxyphil cells
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Chief cells
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Intermediate cells
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Follicular cells
B
Correct answer
Explanation
Chief or principal secrete parathormone. These cells are small and appear dark when loaded with parathyroid hormone, and clear when the hormone has been secreted, or in their resting state.
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Thyroxin
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Adrenalin
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Thymosin
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Melatonin
C
Correct answer
Explanation
Thymosin is the hormone of the thymus and it stimulates the development of disease-fighting T cells.
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Gonadotropin-releasing hormone (GnRH)
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Follicle-stimulating hormone (FSH)
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Luteinising hormone (LH)
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Human chorionic gonadotropin (hCG)
D
Correct answer
Explanation
Correct Answer: Human chorionic gonadotropin (hCG)
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Testosterone
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Inhibin
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Progesterone
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Luteinizing hormone
B
Correct answer
Explanation
Inhibin is secreted by sertoli cells. It exerts negative feedback on the production of FSH by cells in the anterior pituitary.
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Bindin
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Avidin
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Activin
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Inhibin
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Hyalin
C
Correct answer
Explanation
Activin is a protein complex which enhances FSH biosynthesis and secretion, and participates in the regulation of the menstrual cycle.
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testosterone and estrogens
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estrogens and progestrone
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testosterone and progestrone
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antibiotics and sex hormones
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only testosterone
B
Correct answer
Explanation
Birth control pills have estrogens and progestrone in them as these are the female sex hormones.
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Adrenaline-Thyroxin
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Calcitonin-Oxytocin
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Insulin-Parathormone
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Testosterone-Corticosterone
C
Correct answer
Explanation
Insulin is a proteinaceous hormone whereas parathormone is a peptide hormone.