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 zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Progesterone hormone is secreted from 

  1. Placenta

  2. Corpus luteum

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The corpus luteum in the ovaries is the major site of progesterone production in humans, progesterone is also produced in smaller quantities by the ovaries themselves, the adrenal glands and, during pregnancy, the placenta.

Multiple choice zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

"Anti abortion" hormone is 

  1. Relaxin

  2. Oxytocin

  3. Progestrone

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

Progesterone belongs to a group of steroid hormones called as progestogens. It is mainly secreted by the corpus luteum in the ovary during the second half of the menstrual cycle. It plays important roles in the menstrual cycle and in maintaining the early stages of pregnancy. The progesterone prepares the body for pregnancy in the event, that the released egg is fertilised. If the egg is not fertilised, the corpus luteum breaks down, the production of progesterone falls and a new menstrual cycle begins. Hence, progesterone is called as the 'anti abortion' hormone. 

Multiple choice biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Stimulation of uterine contraction during child birth is brought by 

  1. Adrenaline

  2. Progesterone

  3. Oxytocin

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

When contraction of the uterus starts, oxytocin is released, which stimulates more contractions and more oxytocin is released. In this way, contractions increase in intensity and frequency. Oxytocin causes contractions during the second and third stages of labor.

Multiple choice biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Which of the following is a gonadotropic hormone? 

  1. Collip's hormone

  2. Prolactin

  3. Oxytocin

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

Luteinizing hormone (LH) stimulates the production of sex hormones by gonads. Since LH acts on gonads, it is known as gonadotropic hormones.  

Oxytocin stimulates strong uterine muscle contraction during childbirth and is known as the birth hormone.
Prolactin targets mammary gland to stimulate breast development and milk production after baby birth.
Parathormone is also called as Collip's hormone and serves to regulate blood calcium level. 
So, the correct answer is option D.

Multiple choice zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Which hormone is responsible for maintenance of pregnancy?

  1. HCG

  2. Progesterone

  3. Estrogen

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

Progesterone is produced from the corpus luteum, which is the small gland, that forms in the ovary after ovulation has occurred. This hormone is essential for the maintenance of pregnancy and also for the development of many symptoms during early pregnancy.

Multiple choice biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Mammalian prolactin is secreted by 

  1. Adenohypophysis

  2. Neurohypophysis

  3. Adrenal cortex

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

Prolactin (PRL), also known as luteotropic hormone or luteotropin, is a protein, that in humans is best known for its role in enabling female mammals to produce milk. Prolactin is a single-chain protein hormone. It is secreted by the lactotrophs in the anterior pituitary (adenohypophysis).

Multiple choice zoology endocrine system and adolescence control of blood glucose endocrine system and hormone hormones in human reproduction

Select the correct matching of a hormone , it's source and function.

  1. Vasopressin, posterior pituitary, Increase loss of water through urine

  2. Norepinephrine, Adrenal medulla, Increase heartbeat, increase rate of respiration and alertness

  3. Glucagon, Beta-cells of islets of langerhans, stimulates glycogenolysis

  4. Prolactin, Posterior pituitary and mammary glands, Regulates growth and milk formation in females
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vasopressin is released by the posterior lobe of the pituitary gland and it stimulates the reabsorption of water and electrolytes. 

Norepinephrine is secreted by the adrenal medulla and it increases the alertness, heartbeat and respiratory rate.
Glucagon is released by alpha cells and it increases the blood sugar level.
Prolactin is released by the anterior lobe of the pituitary gland and it helps in the regulation of mammary glands and the formation of milk in them. 
Thus, the correct answer is 'Norepinephrine, Adrenal medulla, Increase heartbeat, increase rate of respiration and alertness.'

Multiple choice biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

Which of the following hormones fall under the group amino acid derivatives?

  1. Thyroid hormones

  2. Testosterone

  3. Glucagon

  4. Epinephrine
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation

A.Thyroid hormones derived from the amino acid tyrosine.

B. testosterone is derived from cholesterol 

C.Glucagon is derived from proglucagon

D. Epinephrine,derived from the amino acid tyrosine, 

So, the correct answer is 'Epinephrine' and Thyroid hormone'.

Multiple choice biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

Which of the following is very accurate in case of hormonal control and coordination in human body?

  1. Response is slow and wide spread

  2. Transmission of impulse is very quick

  3. Information passes through blood and lymph

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hormonal control and coordination are carried out via transmission through blood and lymph as it serves as a media for carrying and circulating hormones. However, the transmission may not be very quick. while the response is slow and widespread.

So, the correct option is 'Both A and C'.

Multiple choice biology control and co-ordination in plants and animals control of blood glucose hormones in human reproduction testes and ovary

Which hormonal secretion in the body leads to the development mustache and beard in males during  puberty? 

  1. Progesteron

  2. Estrogen

  3. Insulin

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

Testosterone is the primary male sex hormone and an anabolic steroid. In male humans, during puberty, the growth of mustache and beard is seen as a sign of growth.

Multiple choice biology control and co-ordination in plants and animals control of blood glucose hormones in human reproduction testes and ovary

Growth Hormone is secreted by

  1. Pineal Body

  2. Pituitary Gland

  3. Pancreas

  4. Parathyroid Gland
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Growth hormone (GH), also called somatotropin or human growth hormone, peptide hormone secreted by the anterior lobe of the pituitary gland. It stimulates the growth of essentially all tissues of the body, including bone.

Multiple choice

Which cells will hormones affect?

  1. Those with the correct receptors.

  2. All cells are affected by every hormone.

  3. The cells the hormones are directed to.

  4. Hormones don't affect cells.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hormones are chemical messengers that only affect target cells. Target cells possess specific receptors that bind to the hormone, allowing it to trigger a response.