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

The sex hormones estradiol and testosterone are

  1. Turpentine

  2. Steroid

  3. Cholestane

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

A steroid is a type of organic compound that contains a specific arrangement of four cycloalkane rings that are joined to each other. Examples of steroids include the dietary fat cholesterol, the sex hormones estradiol and testosterone and the anti-inflammatory drug dexamethasone.

Multiple choice

Which of the following amino acids acts as precursor to hormone epinephrine, norepinephrine and dopamine?

  1. Amorphic mutation

  2. Eomorphic mutation

  3. Antimorphic mutations

  4. Proline

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

A frameshift mutation is a mutation caused by insertion or deletion of a number of nucleotides that is not evenly divisible by three from a DNA sequence. A nonsense mutation is a point mutation in a sequence of DNA that results in a premature stop codon, or a nonsense codon in the transcribed mRNA, and possibly a truncated, and often non functional protein product. Missense mutations are types of point mutations where a single nucleotide is changed to cause substitution of a different amino acid. A neutral mutation is a mutation that occurs in an amino acid codon that results in the use of a different, but chemically similar, amino acid. Silent mutations are mutations that do not result in a change to the amino acid sequence of a protein, unless the changed amino acid is sufficiently similar to the original.

Multiple choice

Which of the following is a sex hormone?

  1. Erythritol

  2. Estradiol

  3. Ethacridine lactate

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

Estradiol is a sex hormone. Estradiol is abbreviated E2 as it has 2 hydroxyl groups in its molecular structure. Estradiol is about 10 times as potent as estrone and about 80 times as potent as estriol in its estrogenic effect.

Multiple choice

Estrogen is

  1. Hormone that stimulates red blood call production

  2. One of large group enzymes that hydrolyse various esters

  3. Period of reproductive cycle of the mammal

  4. One of a group of female sex hormones which among others affects and promotes the development of the secondary sex characteristics
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Estrogen is one of the primary female sex hormones responsible for the development and regulation of the female reproductive system. It promotes the development of secondary sex characteristics like breast development, wider hips, and body hair patterns. Estrogen also regulates the menstrual cycle and plays crucial roles in bone health and cardiovascular function.

Multiple choice

Which of the following is not the property of aldosterone?

  1. It is a mineralocorticoid hormone.

  2. It is produced form progesterone.

  3. It is responsible for raise in blood pressure and fluid volume.

  4. It is responsible for intake of Na+ ions.

  5. It is responsible for changes associated with luteal phase of menstrual cycle.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Progesterone is responsible for changes associated with luteal phase of menstrual cycle.