Biology ยท 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

Prohormones are

  1. active forms of hormones

  2. inactive forms of hormones

  3. both (1) and (2)

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Prohormones are inactive precursor molecules that must be converted to active hormones through enzymatic processing. This conversion allows the body to regulate hormone levels and control when and where active hormones become available.

Multiple choice

Which of the following is not a side effect of hormone treatment?

  1. Hot flashes

  2. Loss of libido

  3. Myelosuppression

  4. Osteoporosis

  5. Loss of main male sex hormone
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Myelosuppression is a medical condition where the bone marrow activity is decreased, resulting in fewer red blood cells. It is a major side effect of chemotherapy.

Multiple choice

Which is the correct statement with reference to the control of lactation in a nursing mother?

  1. In a nursing mother, the prolactin stimulates milk ejection .

  2. Placental steroid secretion decelarates lactation during pregnancy.

  3. In a nursing mother, the vasopressin is secreted in response to suckling.

  4. In a nursing mother, the oxytocin secretion can be suppressed by dopamine agonists.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This statement is correct. The placental steroid secretion decelarates lactation during pregnancy in order to maintain the pregnancy.

Multiple choice

Which of the following placental hormones is an important source for both estrogen and progesterone hormones?

  1. FSH

  2. LH

  3. HCG

  4. HCS

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

Human Chorionic Gonadotropin (HCG) is a hormone produced during pregnancy, which is made by developing placenta after conception and later by the placental component syncytiotrophoblast. HCG is secreted to increase ovarian production of estrogen and progesterone and to stop the menstrual periods.

Multiple choice

Which of the following hormone is related to the male sex hormone?

  1. Melatonin

  2. Testosterone

  3. Oxytocin

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

Testosterone is the primary male sex hormone (androgen) produced mainly in the testes, responsible for male sexual development and characteristics. Option B is correct. Melatonin regulates sleep-wake cycles, oxytocin is involved in bonding and childbirth, and insulin regulates blood sugar levels.

Multiple choice

Which of the following hormones is not a reproductive hormone?

  1. Progesterone

  2. Estrogen

  3. Thyroxin

  4. Testosterone

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

Thyroxine is a thyroid hormone that regulates metabolism, growth, and development. It is produced by the thyroid gland, not the reproductive organs. Progesterone, estrogen, and testosterone are all reproductive hormones involved in sexual development, menstrual cycles, and fertility.