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

Multiple choice

Which of the following hormones ensure that the corpus luteum continues to secrete progesterone and estrogen?

  1. Human Chorionic Gonadotropin

  2. Human Placental Lactogen

  3. Estrogen

  4. Progesterone

  5. Relaxin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The first placental hormone produced is hCG, which can be found in maternal blood and urine as early as the first missed menstrual period. hCG ensures that the corpus luteum continues to secrete progesterone and estrogen.

Multiple choice

Which of the following sets represents steroid hormones only?

  1. Adrenaline, thyroxin, oxytocin

  2. Cortisone, testosterone, vasopressin

  3. Insulin, estrogen, testosterone

  4. Oxytocin, vasopressin, cortisone

  5. Cortisone, testosterone, estrogen
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Cortisone, testosterone and estrogen: All are steroid hormones

Multiple choice

Which of the following is the function of gastrin hormone?

The endocrine cells present in different parts of Gastrointestinal tract secrete some local hormones which are proteinaceous in nature.

 

 

 

  1. Stimulation of secretion of bile juice

  2. Stimulation of pancreas

  3. Stimulation of secretion of HCl

  4. Stimulation of thyroid

  5. Stimulation of adrenal cortex
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Gastrin is secreted from gastric gland, and regulates the secretion of gastric juice and HCl from oxyntic cells of stomach.

Multiple choice

Which of the following statements is incorrect?

  1. Insulin is secreted by the by β-cells of islets of Langerhans.

  2. Human insulin is a polypeptide of 51 amino acids arranged in a single chain.

  3. Banting and Best isolated insulin from dog’s pancreas.

  4. Insulin regulates carbohydrate metabolism.

  5. Humulin is synthetic human insulin.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Human insulin is a polypeptide of 51 amino acids arranged in two chains (A and B) bearing 21 and 30 amino acids respectively.

Multiple choice

Which of the following statements are true regarding androgens?

  1. They stimulate the male pattern of development.
  2. They stimulate the male and female patterns of development.
  3. They contribute to sex drive in male and females.
  4. They contribute to male secondary sex characteristics.
  5. They stimulate protein synthesis.

  1. 1, 2 and 3

  2. 1, 3, 4 and 5

  3. 1, 2, 4 and 5

  4. 1, 2, 3 and 4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Androgens are male sex hormones that stimulate male pattern development and secondary sexual characteristics. They contribute to sex drive in both males and females and have anabolic effects including protein synthesis stimulation. Statement 2 is incorrect because androgens primarily stimulate male (not both male and female) patterns of development.

Multiple choice

Which of the following amino acids acts as precursor to hormones epinephrine, norepinephrine and dopamine?

  1. Tyrosine

  2. Threonine

  3. Tryptophan

  4. Proline

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In dopaminergic cells in the brain, tyrosine is converted to L-DOPA by the enzyme tyrosine hydroxylase (TH). TH is the rate-limiting enzyme involved in the synthesis of the neurotransmitter dopamine. Dopamine can then be converted into norepinephrine and epinephrine.