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 factors is responsible for the changes associated with puberty?

  1. Secretion of adrenaline in males and thyroxin in females

  2. Secretion of testosterone in males and adrenaline in females

  3. Secretion of testosterone in males and oestrogen in females

  4. Secretion of thyroxin in males and oestrogen in females
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Many dramatic changes are observed in one's appearance as one approaches 10–12 years of age.  These changes are associated with puberty because of the secretion of testosterone in males and oestrogen in females.

Multiple choice

Interleukins and growth factors are ______________.

  1. cytokines

  2. lipoxins

  3. enzymes

  4. hormones
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  1. Cytokines are mediators that regulate immunological, inflammatory and reparative host response.
    1. They are produced by cells like lymphocytes, macrophages, platelets, etc.
    2. Their action is local not systemic.
    3. They have effect on growth and differentiation of various cells.
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.