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 hormone has an inhibitory effect on erythropoiesis?

  1. Androgen

  2. Estrogen

  3. Erythropoietin

  4. Thyroxine

  5. Cortisol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Estrogens have inhibitory effect on erythropoiesis through suppression of erythropoietin production. Estrogen is the main sex hormone in women, and is essential to the menstrual cycle.

Multiple choice

Which one of the following hormones is INCORRECTLY paired with its function?

  1. Melatonin - biological rhythm

  2. Glucagon - increases blood glucose levels

  3. Prolactin - stimulates milk secretion

  4. Calcitonin - increases blood calcium level
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Calcitonin acts to decrease blood calcium levels by inhibiting osteoclast activity and promoting calcium excretion, making the statement that it increases blood calcium levels incorrect.

Multiple choice zoology respiratory system human respiratory system

Which of the following can be considered as odd one?

  1. Larynx

  2. Glucagon

  3. Testosterone

  4. Prolactin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Larynx is the sound box while the rest three glucagon, testosterone and prolactin are hormones.
So, the correct answer is 'Larynx'.
Multiple choice

Which essential hormone does the pancreas produce?

  1. adrenaline

  2. insulin

  3. estrogen

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

The pancreas is a vital organ that regulates blood sugar levels by producing insulin and glucagon. Adrenaline is produced by the adrenal glands, while estrogen and testosterone are sex hormones.

Multiple choice

Which of the following can cause excessive hair growth?

  1. cortisone

  2. steroids

  3. hormones

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Excessive hair growth can be triggered by various factors, including hormonal imbalances, the use of certain medications like steroids, and medical treatments involving cortisone.

Multiple choice

What causes the differences in male and female sexual hair patterns?

  1. concentration of circulating estrogens

  2. concentrations of circulating androgens

  3. concentration of circulating insulin

  4. concentration of circulating glucose
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Androgens are the primary hormones responsible for the development of terminal hair in both males and females, influencing the distribution and pattern of sexual hair.

Multiple choice biotechnology and genetic engineering genetic technology genetic engineering biology making use of enzymes

Which of the following is produced by genetic engineered bacteria?

  1. thyroxine

  2. insulin

  3. glucagon

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

Genetically modified or Genetically engineered bacteria were the first organisms to be modified in the laboratory, due to their simple genetics. These organisms are now used for several purposes and are particularly important in producing large amounts of pure human proteins for use in medicine. Insulin is normally produced by it.

So, the correct option is 'insulin'.

Multiple choice biotechnology and genetic engineering genetic technology genetic engineering biology making use of enzymes

During the processing of the prohormone "proinsulin" into the mature "insulin".

  1. C-peptide is added to proinsulin

  2. C-peptide is removed from proinsulin

  3. B-peptide is added to proinsulin

  4. B-peptide is removed from proinsulin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Both C-Peptide and mature insulin are biologically active. Cell components and proteins in this image are not to scale. Proinsulin is the prohormone precursor to insulin made in the beta cells of the islets of Langerhans, specialized regions of the pancreas. In humans, proinsulin is encoded by the INS gene.

So, the correct option is 'C-Peptide is removed from proinsulin'.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans
Pick up the hormone which is not secreted by human placenta.

  1. hCG

  2. hPL

  3. Prolactin

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

Prolactin is a hormone secreted in mammals (lactotrophs), usually females and stimulates the mammary gland to produce milk. This hormone is also called luteotropin or luteotropic hormone. The major source of prolactin is the anterior pituitary regulated by the hypothalamus, however, several other tissues synthesize and secrete this hormone. All the other hormones in the options such as hCG, hPL, and estrogen are secreted by the placenta.

Thus, the correct answer is 'Prolactin'.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Hormone, human chorionic gonadotropin, is secreted by

  1. Placenta

  2. Ovary

  3. Anterior pituitary gland

  4. Posterior pituitary gland
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The placenta is a cushion like tissue which supports the embryo and facilitates the supply of oxygen and nutrients to the embryo and also the removal of carbon dioxide and excretory waste materials produced by the embryo. It also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin, human placental lactogen, estrogens, progesterone, and relaxin etc.

So, the correct option is 'Placenta'.