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

In case of G-protein coupled receptor (GPCR), which of the following forms of G-protein is considered to be in active state?

  1. G-protein - ADP

  2. G-protein - ATP

  3. G-protein - GDP

  4. G-protein - GTP
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

G-protein coupled receptors (GPCR) are responsible for signal transduction. GPCRs are linked to trimeric G proteins. G-proteins are GTPase switch proteins. These proteins are turned on or remained active when bound to GTP and turned off or inactivated when bound to GDP.

Multiple choice

Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it?

  1. Insulin and glucagon

  2. Thyroxin and insulin

  3. Somatostatin and oxytocin

  4. Cortisol and testosterone
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Steroid hormones such as cortisol, testosterone, estradiol and progesterone mostly regulate gene expression and chromosome function by the interaction of hormone receptor complex with the genome. So, these can easily pass through the cell membrane of the target cell and bind to a receptor inside it.

Multiple choice

Choose the correct statement(s) from the following for G-protein coupled receptor. A. 7- trans membrane domain B. Phosphoinositol pathway C. Activated by an internal signal in the form of a signal mediator D. cAMP dependent

  1. A and B

  2. A, C and D

  3. Only C

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

All of them are correct except option C as G-protein coupled receptor is activated by the external signal in the form of ligand or signal mediator.

Multiple choice

Which of the following statements is/are NOT true for steroid hormones? A. They act as cell nucleus. B. They interact with target cells’ plasma membrane receptors. C. They increase the activity of target enzyme. D. They act as transcriptional enhancer.

  1. Only B

  2. Only A and B

  3. Only B and C

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

Steroid hormones interact with nuclear receptor of target cells and do not increase the activity of target enzyme.

Multiple choice

Which of the following hormones is related with growth?

  1. Testosterone

  2. Thyroxin

  3. Oestrogen

  4. Adrenalin

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It plays vital roles in digestion, heart and muscle function, brain development and maintenance of bones. Hence, the hormone is related with growth.