Descriptive Questions on Endocrine System Class 10 Concise ICSE Biology Selina Solutions Ch-12. In this article you will get the solutions / Answer of Descriptive Type Questions as council latest prescribe guideline for upcoming board exam. Visit official website CISCE for detail information about ICSE Board Class-10 Biology.
Descriptive Questions on Endocrine System Class 10 Concise ICSE Biology Selina Solutions Ch-12
| Board | ICSE |
| Subject | Biology |
| Class | 10 |
| Book | Selina Concise |
| Chapter-12 | Endocrine System |
| Topics | Solutions of Descriptive Ans Type Questions |
Descriptive Questions on Endocrine System
Que-1: Define the following terms:
(a) Endocrine system
(b) Hormones
(c) Myxoedema
Ans:
(a) Endocrine system : Endocrine system consists of several endocrine glands/glandular cells which activate each other and work as a system to bring about chemical coordination in the body.
(b) Hormones : Hormones are secretions from specific cells or glands in the body, which are carried to all body parts through the blood, but exert their effect only on one or more specific body parts (target organ or cells).
(c) Myxoedema : Myxoedema is a condition which occurs in adults due to hypothyroidism in which the person becomes sluggish with swelling of the face and hands.
Que-2: Distinguish between the following pairs :
(a) Exocrine and endocrine glands (manner of secretion)
(b) Enzymes and hormones (chemical composition and mode of action)
(c) Nervous control and hormonal control (transmission and effect)
(d) Diabetes mellitus and diabetes insipidus (cause and symptoms)
(e) Addison’s disease and Cushing’s syndrome (cause and sugar level)
Ans:
(a) Differences between exocrine and endocrine glands (manner of secretion):
| Exocrine glands | Endocrine glands |
| Secretions are carried through special ducts. | Secretions are poured directly into the blood. |
(b) Differences between enzymes and hormones (chemical composition and mode of action) :
| Enzymes | Hormones |
| Enzymes are protein in nature. | Hormones are peptides, amines or steroids. |
| Enzymes are substrate specific. These are present in all cells and show their activity there | Hormones are specific to the target cell, tissue, or system. They are produced at one site and show their activities at other sites. |
(c) Differences between nervous control and hormonal control (transmission and effect) :
| Nervous control | Hormonal control |
| Transmitted electro-chemically through nerve fibres and chemically across synapses. | Transmitted chemically through blood. |
| Effect is only short-lived. | Effect is short term or long lasting. |
(d) Differences between diabetes mellitus and diabetes insipidus (cause and symptoms) :
| Diabetes mellitus | Diabetes insipidus |
| Caused due to insufficient secretion of insulin. | Caused due to insufficient secretion of anti-diuretic hormone (ADH) |
| High concentration of sugar in blood. | No sugar in urine |
(e) Differences between Addison’s disease and Cushing’s syndrome (cause and sugar level) :
| Addison’s disease | Cushing’s syndrome |
| Caused due to hyposecretion of cortisone | Caused due to hypersecretion of cortisone |
| Low blood sugar level | High blood sugar level |
Que-3: Give reason :
(a) Adrenaline is often described as the emergency hormone.
(b) Pituitary is popularly called as the master gland.
(c) People living in the low Himalayan hilly regions often suffer from goitre.
(d) Simple goitre can be prevented by using iodised salt in food.
Ans:
(a) Adrenaline is often described as the emergency hormone because it prepares the body to meet any emergency situation, for fight and face the danger or flight and run away from it. More adrenaline is secreted which makes the heart beat faster, increases the breathing, releases more glucose into the blood stream to fulfill the energy requirement.
(b) Pituitary is popularly called as the master gland because it controls the functioning of all the other endocrine glands.
(c) People living in the low Himalayan hilly regions often suffer from goitre because iodine is deficient in soil and hence, in the food grown there. Insufficient iodine produces less thyroxine which results in goitre.
(d) Iodised salt contains iodine which is an active ingredient in the production of thyroxine. Hence, it is recommended to use iodised salt in food to prevent simple goitre.
Que-4: Identify the gland with the help of following clues:
(a) The gland is like a cap on top of each kidney.
(b) The gland is both a duct gland as well as a ductless gland.
(c) A bilobed (butterfly-shaped) gland.
(d) The gland is located in mid-brain below the hypothalamus.
Ans:
(a) Adrenal
(b) Pancreas
(c) Thyroid
(d) Pituitary
–: End of Descriptive Questions on Endocrine System Class 10 Concise ICSE Biology Selina Ch-12 solutions :–
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