Biology · 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 pairs is incorrectly matched?

  1. Insulin - Diabetes mellitus (disease)

  2. Glucagon - Beta cell (source)

  3. Oxytocin - Posterior pituitary (release)

  4. FSH - Spermatogenesis (function)

  5. NA
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A peptide hormone produced by alpha cells of the pancreas

Multiple choice

Sex pheromone present in pigs is known as

  1. androstenol

  2. androstenone

  3. androsterone

  4. dehydroepiandrosterone
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Androstenol is a sex pheromone in pigs, possessing a musk-like odour. It is found in large quantities in boar saliva, but also in smaller quantities in human sweat glands. It is analogous to sex hormones yet has minimal or no androgenic activity.

Multiple choice

Which among the following can be converted into testosterone?

  1. 4-Androstenediol

  2. Androstenedione

  3. Estrone

  4. Estradiol
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

4-Androstenediol is an androstenediol that is converted to testosterone. The conversion rate is about 15.76%, almost triple that of androstenedione, due to utilization of a different enzymatic pathway.

Multiple choice

Which of the following hormones is also known as a happiness hormone?

  1. Serine Peptidase

  2. Histamine

  3. Serotonin

  4. Heparin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Serotonin is a monoamine neurotransmitter. Biochemically derived from tryptophan, serotonin is primarily found in the gastrointestinal (GI) tract, platelets, and in the central nervous system (CNS) of animals including humans. It is a well-known contributor to feelings of well-being; therefore it is also known as a happiness hormone despite not being a hormone.

Multiple choice

Which hormone forms the basis of pregnancy tests?

  1. Leutenizing hormone

  2. Follicle-stimulating hormone

  3. Progesterone

  4. Human chorionic gonadotropin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 This hormone is secreted by the trophoblast cells of the embryo, so its presence confirms the presence of a foetus and thus it imples that pregnancy has set in.

Multiple choice

Which of the following organs secretes estrogen and progesterone hormones?

  1. Ovary

  2. Testis

  3. Pituitary gland

  4. Thyroid gland
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The ovaries produce both estrogen and progesterone, which regulate the menstrual cycle and maintain pregnancy. The testis produces testosterone, pituitary gland secretes various hormones like FSH and LH, and thyroid gland produces thyroxine.

Multiple choice

Water balance of the body is controlled by the secretion of _________.

  1. estrogen

  2. progesterone

  3. testosterone

  4. anti diuretic hormone
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Antidiuretic hormone (ADH or vasopressin) controls water balance by reducing urine production and promoting water reabsorption in kidneys. Estrogen (A), progesterone (B), and testosterone (C) are sex hormones not primarily involved in water balance regulation.