Biology · General Awareness
Human Endocrine System
1,395 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
-
More of testosterone is produced
-
Less of testosterone is produced
-
There is no effect on the production of testosterone
-
Sperm production will increase
A
Correct answer
Explanation
Luteinising hormone (LH) stimulates the Leydig cells in the testes to produce testosterone. In males, LH is the primary regulator of testosterone synthesis. When exogenous LH is administered, it will stimulate increased testosterone production by these cells. LH does not directly stimulate sperm production - that's the role of FSH.
-
Progesterone
-
Oestrogen
-
Insulin
-
Testosterone
-
Growth hormone
D
Correct answer
Explanation
Testosterone released by testes is responsible for bringing visible changes in boys on puberty.
-
Pituitary gland releases testosterone and estrogen.
-
Thyroid gland releases adrenalin.
-
Adrenal releases insulin.
-
Pancreas releases thyroxine.
-
All of these
A
Correct answer
Explanation
It releases testosterone and estrogen.
-
Adrenalin hormone
-
Estrogen hormone
-
Testosterone hormone
-
Thyroxine hormone
-
Progesterone
C
Correct answer
Explanation
It is secreted by testes.
-
Progestrone
-
Testosterone
-
Oestrogen
-
Pituitary gland
-
Thyroid gland
B
Correct answer
Explanation
Testosterone is the male sex hormone, which is produced inside the testis.
-
Adrenalin
-
Thyroxine
-
Testosterone
-
Human insulin
-
Antitrypsin
D
Correct answer
Explanation
Human insulin is the first hormone produced artificially by bacteria and is widely employed as medicine.
-
Glucocorticoids
-
Mineralocorticoids
-
Adrenocortical steroids
-
Steroid hormones
-
None of these
B
Correct answer
Explanation
Aldosterone is an example of hormones, which influence salt and water metabolism in the body; such hormones are collectively called mineralocorticoids.
-
Parathyroid hormone
-
Thyroxin
-
Epinephrine
-
Insulin
-
Oxytocin
B
Correct answer
Explanation
In the body iodine is needed for the synthesis of thyroxin.
-
Oxytocin
-
Prolactin
-
Melatonin
-
Relaxin
-
None of these
C
Correct answer
Explanation
The hormones from the pineal gland influences sexual development and may reduce sexual activity is called melatonin.
-
Adrenal cortex
-
Adrenal medulla
-
Ovary
-
Interstetium of testes
-
None of these
B
Correct answer
Explanation
Chromaffin cells are the hormone producing cells of adrenal medulla.
-
Anterior pituitary
-
Posterior pituitary
-
Hypothalamus
-
Diencephalon region of the brain
-
None of these
A
Correct answer
Explanation
The source of melanocyte stimulating hormone is anterior pituitary.
-
proteins
-
carbohydrates
-
aminoacids
-
steroids
-
none of these
D
Correct answer
Explanation
Chemically the female sex hormones estradiol and progesterone are steroids.
-
active forms of hormones
-
inactive forms of hormones
-
both (1) and (2)
-
none of the above
B
Correct answer
Explanation
Prohormones are inactive precursor molecules that must be converted to active hormones through enzymatic processing. This conversion allows the body to regulate hormone levels and control when and where active hormones become available.
-
developing graafian follicles
-
corpus luteum
-
the entire ovary
-
Leydig's cells
-
adrenaline
-
non-adreanline
-
thyroxine
-
thymosin
D
Correct answer
Explanation
Thymosin is the hormone secreted by the thymus gland that stimulates the maturation and differentiation of lymphocytes (T-cells) in the fetus. Adrenaline, non-adrenaline (norepinephrine), and thyroxine are not involved in lymphocyte maturation.