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

Multiple choice

Which of the following statements about parathormone are not correct?

P. Parathormone is produced and secreted by thyroid gland. Q. Parathormone is a steroid hormone. R. Parathormone influences calcium absorption in the small intestine by regulating the metabolism of vitamin D. S. Blood calcium level can be increased by administration of parathormone.

  1. P and Q

  2. P and R

  3. P and S

  4. Q and R

  5. Q and S
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct because parathormone or parathyroid hormone is produced and secreted by the parathyroid gland that regulates serum calcium concentration. Parathormone is a polypeptide containing 84 amino acids.

Multiple choice

Which of the following pairs is not correctly matched?

  1. Calcitonin : Parafollicular cell (source)

  2. Glucagon : Beta cells (source)

  3. MSH : Melanogenesis (function)

  4. Insulin : Diabetes mellitus (disease)

  5. Melatonin : Maintains sleep-wake cycle (function)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glucagon is a peptide hormone, produced by alpha cells of the pancreas. Insulin is a peptide hormone synthesized, packaged and secreted in pancreatic beta cells.

Multiple choice

Which among the following hormones is a main component of oral contraceptives?

  1. Follicle-stimulating hormone

  2. Luteinizing hormone

  3. Prolactin

  4. Progesterone
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oral contraceptives generally contain progesterone. By maintaining a higher level of progesterone through contraceptives, the signals from the brain to the ovaries initiate the ovarian cycle, which lead to suppression of follicle maturation and ovulation takes place.

Multiple choice

Select the true statement regarding the control of lactation in human females.

  1. Prolactin stimulates milk ejection

  2. Progesterone restricts lactation during pregnancy

  3. The secretion of oxytocin may be restrained by dopamine agonists.

  4. In human females, the vasopressin is released in response to suckling.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Progesterone restricts lactation during pregnancy. The fall in progesterone level following delivery is one of the activates for milk production.

Multiple choice

Which among the following can be excluded from the function of the fetal adrenal glands and kidneys?

  1. Embryo androgens stimulate the production of pulmonary surfactant by alveolar type I cells.

  2. The embryo zone of the adrenal gland produces large quantities of progesterone.

  3. The embryo kidneys start to produce a hypertonic urine after about 8 weeks gestation.

  4. Regulates the acid-base balance of the embryo.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The kidneys play an important role in the regulation of acid-base balance of the developing embryo within the mother's womb.