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
  1. Thrombopoietin stimulates megakaryocytes to produce platelets.

  2. Calcidiol hormone is inactive form of D3.

  3. Neurohormones are called releasing factor.

  4. Angiotensin is secreted tensin is secreted by hepatocyes of liver.

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

Angiotensin is secreted by hepatocyes of liver.

Multiple choice
  1. Zona pellucida

  2. Developing trophoblast

  3. Fetal pituitary gland

  4. Maternal pituitary gland

  5. Ovarian corpus luteum

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

A fall in maternal progesterone levels results in sloughing of the endometrial wall and allows the next ovulation cycle to begin. Therefore, in order for an embryo to implant and remain in the uterus, local and systemic maternal progesterone levels must remain elevated. For the first 14 days after ovulation, the corpus luteum secretes progesterone. Without additional support, the corpus luteum spontaneously regresses at the end of a typical menstrual cycle.

Multiple choice
  1. Corticotropin-releasing hormone

  2. Gonadotropin-releasing hormone

  3. Growth hormone-releasing hormone

  4. Somatostatin

  5. Thyrotropin-releasing hormone

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

Leuprolide is a well known gonadotropin-releasing hormone (GnRH) agonist analog, that is more potent than the natural hormone, GnRH. It has been useful in prostatic cancer treatment.

Multiple choice
  1. Thyroid

  2. Testosterone

  3. Adrenaline

  4. Noradrenaline

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

Adrenaline (epinephrine) is the primary hormone released by adrenal glands during stressful situations, preparing the body for 'fight or flight' response. It increases heart rate, blood pressure, and energy availability. Noradrenaline also plays a role but adrenaline is the primary hormone.

Multiple choice
  1. leydig cells

  2. seminiferous tubules

  3. epididymis

  4. vas deferens

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

Leydig cells are found adjacent to the seminiferous tubules in the testicle. They produce testosterone in the presence of luteinizing hormone (LH). Leydig cells are polyhedral in shape, display a large prominent nucleus, an eosinophilic cytoplasm and numerous lipid-filled vesicles.

Multiple choice
  1. vasopressin

  2. Testosterone

  3. Interstitial cell-stimulating hormone

  4. Thyroid-stimulating hormone

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

Testosterone is a steroid hormone from the androgen group . In mammals, testosterone is primarily secreted in the testes of males and the ovaries of females, although small amounts are also secreted by the adrenal glands. It is the principal male sex hormone and an anabolic steroid.

Multiple choice
  1. Ghrelin

  2. Estrogen

  3. Progesterone

  4. Insulin

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

Estrogen is a hormone that comprises a group of compounds, including estrone, estradiol and estriol. It is the main sex hormone in women and is essential to the menstrual cycle. Although estrogen exists in men as well as women, it is found in higher amounts in women, especially those capable of reproducing.