Endocrine & Reproductive Systems Quiz - ICSE Class 10 Biology

Free practice quiz: Endocrine & Reproductive Systems (ICSE Class 10 Biology). 53 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 10 Biology practice quiz has 53 multiple-choice questions on Endocrine & Reproductive Systems, and 53 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which endocrine gland, often called the 'master gland', regulates the activity of many other endocrine glands by secreting tropic hormones?

   1. Thyroid gland
   2. Adrenal gland
   3. Pituitary gland
   4. Pancreas
   Show answer

   Answer: C. Pituitary gland

   The pituitary gland is located at the base of the brain and is responsible for secreting hormones that control other endocrine glands, such as the thyroid, adrenal glands, and reproductive organs.

2. Diabetes insipidus, a condition characterized by excessive thirst and urination, is usually caused by a deficiency in which hormone or a problem with its receptor?

   1. Insulin
   2. Glucagon
   3. Antidiuretic hormone (ADH)
   4. Thyroxine
   Show answer

   Answer: C. Antidiuretic hormone (ADH)

   Antidiuretic hormone (ADH), also known as vasopressin, regulates water reabsorption in the kidneys. A deficiency in ADH (central diabetes insipidus) or the kidneys' inability to respond to it (nephrogenic diabetes insipidus) leads to the inability to concentrate urine and excessive water loss.

3. During spermatogenesis, the diploid cells that undergo meiosis to produce four haploid spermatids are called:

   1. Spermatogonia
   2. Primary spermatocytes
   3. Secondary spermatocytes
   4. Spermatids
   Show answer

   Answer: B. Primary spermatocytes

   Spermatogenesis begins with diploid spermatogonia. These differentiate into primary spermatocytes, which are diploid cells that enter meiosis I. Meiosis I produces two haploid secondary spermatocytes, and meiosis II of these produces four haploid spermatids.

4. During oogenesis, the haploid cell that develops into an ovum after fertilization is the:

   1. Oogonium
   2. Primary oocyte
   3. Secondary oocyte
   4. Polar body
   Show answer

   Answer: C. Secondary oocyte

   Oogenesis begins with diploid oogonia. These differentiate into primary oocytes, which arrest in meiosis I. Upon ovulation, the secondary oocyte begins meiosis II, which is completed only upon fertilization, forming a mature ovum and a second polar body.

5. Which hormone is secreted by the adrenal medulla and is crucial for the 'fight-or-flight' response, leading to increased heart rate, blood pressure, and glucose release?

   1. Cortisol
   2. Aldosterone
   3. Epinephrine (Adrenaline)
   4. Insulin
   Show answer

   Answer: C. Epinephrine (Adrenaline)

   Epinephrine (also known as adrenaline) is a key hormone released by the adrenal medulla in response to stress. It prepares the body for immediate action by increasing heart rate, constricting blood vessels in non-essential areas, dilating blood vessels in muscles, and mobilizing glucose for energy.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Graves' disease, characterized by hyperthyroidism and bulging eyes (exophthalmos), is primarily caused by an autoimmune disorder attacking which endocrine gland?
2. The hormone insulin, secreted by the beta cells of the islets of Langerhans in the pancreas, plays a crucial role in:
3. During the menstrual cycle, the surge in luteinizing hormone (LH) just before ovulation is triggered by the high levels of which hormone?
4. Which structure in the male reproductive system is responsible for the production of sperm and androgens (like testosterone)?
5. In females, the primary site of fertilization is typically the:
6. Acromegaly, a disorder characterized by excessive growth of hands, feet, and face in adulthood, is usually caused by the overproduction of which hormone by the pituitary gland?
7. The adrenal medulla secretes which of the following hormones in response to stress, commonly known as the 'fight-or-flight' hormone?
8. Which hormone is responsible for the development of secondary sexual characteristics in males, such as deepening of the voice and growth of facial hair?
9. The corpus luteum, formed after ovulation from the remnants of the follicle, primarily secretes which hormone to maintain the uterine lining in early pregnancy?
10. Which part of the female reproductive system is primarily responsible for producing eggs (ova) and sex hormones like estrogen and progesterone?
11. Cushing's syndrome, marked by symptoms like weight gain, thin skin, and high blood pressure, is typically a result of prolonged exposure to high levels of which hormone?
12. Sperm are stored and mature in which coiled tube located on the back of each testis?
13. The hormone calcitonin, secreted by the parafollicular cells of the thyroid gland, acts to:
14. Which of the following events is MOST directly triggered by the LH surge during the menstrual cycle?
15. The secretion of parathyroid hormone (PTH) is primarily regulated by:
16. Ectopic pregnancy refers to the implantation of a fertilized egg in a location other than the uterine cavity, most commonly in the:
17. The hormone oxytocin, produced by the hypothalamus and released by the posterior pituitary, is primarily involved in:
18. Which hormone is responsible for the development of female secondary sexual characteristics, such as breast development and widening of the hips?
19. A deficiency in iodine can lead to the enlargement of the thyroid gland, a condition known as:
20. Which gland secretes melatonin, a hormone that regulates sleep-wake cycles?
21. The hormone progesterone is crucial for preparing the uterus for pregnancy by stimulating the thickening of the endometrium. Which structure is the primary producer of progesterone after ovulation?
22. Klinefelter syndrome in males is a genetic condition characterized by the presence of an extra X chromosome (XXY), leading to:
23. The adrenal cortex produces a group of steroid hormones known as corticosteroids. Which of these is primarily involved in regulating salt and water balance in the body?
24. Which phase of the ovarian cycle is characterized by the growth and development of ovarian follicles, stimulated by FSH?
25. The production of sperm cells, called spermatogenesis, occurs in the:
26. Which hormone is responsible for initiating and maintaining lactation (milk production) after childbirth?
27. The primary function of the vas deferens (ductus deferens) in the male reproductive system is to:
28. A person with hypothyroidism may exhibit which of the following symptoms?
29. Which of the following glands produces hormones that regulate calcium and phosphate homeostasis by acting on bones, kidneys, and the intestine?
30. The seminal vesicles contribute a significant portion of the seminal fluid, which is rich in:
31. Which of the following is a characteristic symptom of diabetes mellitus?
32. During the menstrual cycle, the secretory phase of the endometrium, characterized by thickening and vascularization, is primarily supported by the hormone:
33. Which endocrine gland produces hormones that are essential for regulating metabolism, growth, and development, particularly in response to cold temperatures?
34. The process of ovulation, the release of a mature egg from the ovary, is triggered by a sharp increase in which hormone?
35. Which male accessory gland contributes alkaline fluid containing citrate and enzymes that help activate sperm?
36. Turner syndrome (XO) in females is characterized by:
37. Which of the following is NOT a function of the endocrine system?
38. The structure that nourishes the developing fetus and facilitates the exchange of nutrients, gases, and waste products between mother and fetus is the:
39. Infertility in males can be caused by problems with spermatogenesis. Which of the following factors is MOST likely to impair sperm production?
40. Which endocrine gland produces hormones that play a role in the development of the immune system, particularly T-lymphocytes?
41. The expulsion of the fetus from the uterus during childbirth is primarily facilitated by the hormone:
42. Which of the following is a direct consequence of a deficiency in ADH (Antidiuretic Hormone)?
43. The male reproductive organ responsible for producing sperm and testosterone is the:
44. A surge in Follicle-Stimulating Hormone (FSH) in females typically occurs:
45. Which of the following is a primary function of the prostate gland's secretion?
46. In the context of pregnancy, the umbilical cord connects the fetus to the:
47. Which of the following hormones regulates the reabsorption of water and sodium ions by the kidneys, thereby influencing blood pressure?
48. During ovulation, the rupture of the Graafian follicle and the release of the ovum are triggered by the LH surge. What is the primary stimulus for this LH surge?

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