The Endocrine System

Home / Board / ICSE / important Questions / Class 10 / Biology / The Endocrine System

Class 10 Biology Chapter 10
The Endocrine System
Important Questions

Here, you’ll find important questions related to Chapter 10 The Endocrine System For ICSE Class 10 Biology. These questions have been crafted to assist students in their preparation for the ICSE Class 10 Biology Examination in 2023–24. By practising various question types, students can clarify their doubts, enhance their exam readiness, boost their confidence, and refine their problem-solving skills


The Endocrine System is a crucial topic in the field of biology, especially for Class 10 ICSE students. In this introductory paragraph, we will explore the significance of understanding the endocrine system and its relevance to Class 10 ICSE students. Additionally, we’ll touch upon the importance of having access to essential questions related to this subject to help students excel in their examinations.The endocrine system is a fundamental component of the human body, responsible for regulating various physiological processes through the secretion of hormones. For Class 10 ICSE students studying biology, gaining a comprehensive understanding of the endocrine system is imperative. This system not only plays a pivotal role in maintaining homeostasis but also serves as a crucial part of their curriculum.In preparation for their examinations, Class 10 ICSE students must focus on essential questions related to the endocrine system. These questions will not only aid in comprehending the topic but also in mastering the subject matter. Thus, in this article, we will delve into some of the most important questions concerning the endocrine system for Class 10 ICSE students, ensuring they are well-prepared to excel in their biology examinations. So, let’s embark on this educational journey, exploring the intricacies of the endocrine system and addressing the vital questions that will help students succeed in their Class 10 ICSE biology exams.

What is The Endocrine System?

The endocrine system is a complex network of glands, organs, and tissues in the human body that collectively produce, store, and secrete hormones. Hormones are chemical messengers that regulate various physiological processes, including growth and development, metabolism, tissue function, sexual function, reproduction, and mood.Unlike the nervous system, which uses electrical impulses and neurotransmitters for rapid communication within the body, the endocrine system primarily relies on hormones for signalling. These hormones are secreted by specialised glands, known as endocrine glands, directly into the bloodstream. From there, they travel throughout the body and interact with specific target cells or organs to elicit a response. Key components of the endocrine system include glands such as the pituitary gland, thyroid gland, adrenal glands, pancreas, ovaries (in females), and testes (in males), among others. Each gland produces specific hormones that serve distinct functions. For example, the pituitary gland produces growth hormone, which influences growth and development, while the thyroid gland secretes hormones that regulate metabolism.The endocrine system plays a critical role in maintaining homeostasis, which is the body’s ability to maintain a stable internal environment despite external changes. It helps regulate processes like blood sugar levels, water and electrolyte balance, body temperature, and responses to stress.

Class 10 Biology The Endocrine System Important Questions and Answers

Q1. Which gland is present just below Adam's apple?
(a) Pineal gland
(b) Pituitary gland
(c) Thyroid gland
(d) Thymus gland

Ans. (c) Thyroid gland

Thyroid gland lies in the front of the human neck in a position just below Adam's apple. Thyroid gland is made up of two lobes. These two lobes are joined by a small bridge of thyroid tissue called the isthmus.

Q2. Which of the following glands in the human body acts both as an endocrine gland as well as an exocrine gland?
(a) Adrenal gland
(b) Lacrimal gland
(c) Pancreas
(d) Thyroid

Ans. (c) Pancreas
The pancreas is an endocrine as well as an exocrine gland i.e mixed gland. As an endocrine gland, it functions mostly to regulate blood sugar levels, secreting the hormones insulin, glucagon, somatostatin and pancreatic polypeptide. As a part of the digestive system, it functions as an exocrine gland secreting pancreatic juice into the duodenum through the pancreatic duct.

Q3. State the Location of Adrenal gland

Adrenal glands are also known as suprarenal glands and as the name suggests it is located on top of both the kidneys. It is a triangular-shaped gland situated one on each left and right kidney.Adrenal glands seems like caps above the kidney.

Q4. Differentiate between Hormones and Enzymes


Act at sites usually far away from source.Act usually within the same cell or at the most close to the cell.
Always transported by blood.Not transported by blood. In some cases,
transported by ducts.
Chemically may be proteins, steroids or
amino acids.
Chemically always protein.
Q5. Name the hormone produced by the following glands giving one function of each.
(i) Thyroid
(ii) Pancreas
(iii) Adrenal medulla


(i) The thyroid secretes thyroxine. It controls basal metabolic rate (BMR), growth and differentiation of the body.
(ii) Pancreas secretes insulin and glucagon. These hormones control blood glucose level. Insulin decreases while glucagon increases blood glucose level.
(iii) Adrenal medulla secretes adrenaline. It controls heartbeat and blood pressure and helps in providing glucose to the body in order to overcome emergency situations. It is also called the emergency hormone.

ICSE Class 10 Biology Chapter wise Important Questions


The endocrine system is a remarkable and intricate network of glands and hormones that plays a pivotal role in maintaining the delicate balance of our body’s physiological processes. To aid in the learning journey, offers a valuable resource in the form of a comprehensive collection of questions related to the endocrine system. These questions serve as an invaluable tool for students, helping them reinforce their understanding of this critical topic.

Frequently Asked Questions

Ans: The dorsal side of the heart contains the thymus gland, linked to immune system development. Thymosin hormone is secreted by it, which is essential for developing T-lymphocyte differentiation.
Ans: The primary function of the hypothalamus is to maintain the body as close to homeostasis as possible — the hypothalamus functions as a bridge between the nervous and endocrine systems. The network of hormone-producing organs and glands, the endocrine system, helps control body functions. The hypothalamus reacts by enhancing the appropriate endocrine activity to restore this balance. For example, the hypothalamus will tell the body to sweat if it obtains a signal that the internal temperature is too high.
Ans: The endocrine system comprises endocrine glands that create hormones and chemical messengers that flow via the blood to various body regions. The hypothalamus, pituitary, parathyroid, thyroid, and adrenal glands are significant endocrine glands.
Ans: The human endocrine system has endocrine glands that release hormones. Exocrine glands release their materials onto the surfaces of the body through ducts. Endocrine glands, in contrast, discharge their chemicals readily into the circulatory system. We refer to them as ductless glands.
Ans: The endocrine system consists of several glands. The human brain contains the hypothalamus, pituitary, and pineal glands. The neck includes the parathyroid and thyroid glands. The pancreas is beneath our stomach, the adrenals are on top of the kidneys, and the thymus is between our lungs. The pelvic area contains either male testes or female ovaries, depending upon gender.