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

Estradiol is secreted by

  1. theca interna

  2. theca externa

  3. primary follicle

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

 As the follicle ripens, it increases in size to form graffian follicle. 

Multiple choice

Which of the following is not a hCG?

  1. Chorionic thyrotropin

  2. Relaxin

  3. Estrogen

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

It is not an hCG. It helps in the secretion and storage of milk in the mother after the birth of the young one.

Multiple choice

Location and secretion of Leydig's cells are

  1. Liver - cholesterol

  2. Ovary - estrogen

  3. Testes - testosterone

  4. Pancreas - glucagons
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Leydig's cells are present in testes and secrete male hormone testosterone.

Multiple choice

When blood testosterone level falls below normal, then

  1. LH production in the pituitary ceases

  2. sperm production increases

  3. GnRH release ceases

  4. pituitary releases LH
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pituitary releases LH when the level of blood testosterone falls, which has positive feedback with hypothalamus and the anterior pituitary gland.

Multiple choice

Which of the following are peptide hormones?

  1. ANF
  2. Cortisol
  3. MSH
  4. Testosterone
  5. Vasopressin

  1. 1, 2 and 3

  2. 1, 3 and 5

  3. 2, 3 and 4

  4. 2, 4 and 5

  5. 3, 4 and 5
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Correct answer. Atrial natriuretic factor (ANF) is a powerful vasodilator and a protein (polypeptide) hormone secreted by heart muscle cells. Melanocyte-stimulating hormones (MSH) are a class of peptide hormones that are produced by cells in the intermediate lobe of the pituitary gland. Vasopressin, also known as antidiuretic hormone, is a nine amino acid peptide secreted from the posterior pituitary.

Multiple choice

Identify the incorrectly matched pair.

  1. PTH : Hypercalcemic hormone

  2. Glucagon : Hypoglycemic hormone

  3. ANF : Blood pressure lowering hormone

  4. FSH : Gonadotropic hormone

  5. Vasopressin : Antidiuretic hormone
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glucagon acts mainly on the liver cells (hepatocytes) and stimulates glycogenolysis, resulting in an increased blood sugar (hyperglycemia). Insulin acts mainly on hepatocytes and adipocytes (cells of adipose tissue), and enhances cellular glucose uptake and utilisation, resulting in rapid movement of glucose from blood to hepatocytes and adipocytes, resulting in decreased blood glucose levels (hypoglycemia).

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.