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

There are five main hormones which regulates the process of digestion in the mammals. The hormone responsible for controlling the emission of sodium bicarbonate in the pancreas is

  1. motilin

  2. gastric inhibitory peptide

  3. cholecystokinin (CCK)

  4. secretin

  5. gastrin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Secretin is secreted in the duodenum and signals the secretion of sodium bicarbonate in the pancreas, and it stimulates the bile secretion in the liver. This hormone responds to the acidity of the chyme.

Multiple choice

Bile secretion in the liver is stimulated by hormone:

  1. Gastrin

  2. Secretin

  3. Cholecystokinin

  4. Motilin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Secretin is in the duodenum and signals the secretion of sodium bicarbonate in the pancreas and it stimulates the bile secretion in the liver. This hormone responds to the acidity of the chyme.

Multiple choice

Adrenaline and noradrenaline are hormones and act as

  1. energy producing agents

  2. food storage products

  3. neurotransmitters

  4. energy storing substances

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Neurotransmitters, also known as chemical messengers, are endogenous chemicals that enable neurotransmission. They transmit signals across a chemical synapse, such as a neuromuscular junction, from one neuron (nerve cell) to another target neuron, muscle cell or gland cell (such as adrenaline or noradrenaline).

Multiple choice

Steroid hormones work as

  1. they enter into target cells and bind with specific receptor and activate specific genes to form proteins

  2. they bind to cell membrane

  3. they catalyse formation of c AMP

  4. None of the above

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

Correct Answer: they enter into target cells and bind with specific receptor and activate specific genes to form proteins

Multiple choice

Which of the following is the amino acid derivative hormone?

  1. Insulin

  2. Oxytocin

  3. Erythropoietin

  4. Thyroxine

  5. -
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Thyroid hormone is made up of tyrosine-amino acids. The thyroid hormones, triiodothyronine (T3) and its prohormone, thyroxine (T4), are tyrosine-based hormones that are produced by the thyroid gland and are primarily responsible for regulation of metabolism. T3 and T4 partially compose iodine.

Multiple choice

Mammalian prolactin is secreted by

  1. adenohypophysis

  2. neurohypophysis

  3. adrenal cortex

  4. adrenal medulla

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

Prolactin hormone is released by the adenohypophysis of pituitary gland. It stimulates breast development and milk production in women.

Multiple choice

Parathormone is secreted during

  1. increased blood calcium level

  2. decreased blood calcium level

  3. increased blood sugar level

  4. decreased blood sugar level
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Parathormone is synthesised and released into the blood stream by the parathyroid glands. It regulates phosphorus and calcium in the body.

Multiple choice

Metamorphosis in frog is hastened by which of the following?

  1. Thyroxine

  2. Adrenaline

  3. Glucagon

  4. Insulin

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

Thyroxine is a hormone that is produced by the thyroid gland. In humans, this hormone controls metabolism and shedding. In amphibians (not just axolotls), it stimulates metamorphosis. Metamorphosis can be induced by giving the salamander thyroxine, but a more convenient alternative is to add iodine to the water.

Multiple choice

ACTH is secreted by which of the following?

  1. Thyroid gland

  2. Thymus gland

  3. Pituitary gland

  4. Islets of Langerhans

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Adrenocorticotropic hormone (ACTH) is a hormone that is produced in the anterior or front pituitary gland. The function of ACTH is to regulate levels of cortisol, which is released from the adrenal gland. 

Multiple choice

Which of the following hormones are secreted by pancreas?

  1. Insulin and glucagon

  2. Epinephrine and nor epinephrine

  3. Thyroxine and melanin

  4. Lactocin and oxytocin

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

Insulin and glucagon are hormones that help to regulate levels of blood sugar (glucose) in our body. They are secreted by pancreas.

Multiple choice

What is hormone?

  1. Organic complex substances

  2. chemical messenger

  3. glandular secretion

  4. blood cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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