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Chapters
1: Cell Cycle and Cell Division
2: Structure of Chromosome
3: Genetics
Unit 2: Plant Physiology
4: Absorption by Roots
5: Transpiration
6: Photosynthesis
7: Chemical Coordination in Plants
Unit 3: Human Anatomy and Physiology
8: Circulatory System
9: Human Excretory System
10: Nervous System
11: Sense Organs
▶ 12: Endocrine System
13: Reproductive System
Unit 4: Population
14: Population
Unit 5: Human Evolution
Chapter 15: Human Evolution
Unit 6: Pollution
Chapter 16: Pollution
![Lakhmir Singh solutions for बायोलॉजी [इंग्रजी] इयत्ता १० आईसीएसई chapter 12 - Endocrine System Lakhmir Singh solutions for बायोलॉजी [इंग्रजी] इयत्ता १० आईसीएसई chapter 12 - Endocrine System - Shaalaa.com](/images/biology-english-class-10-icse_6:7181a54a5d284da8b50dd2f92022a1f6.jpg)
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Solutions for Chapter 12: Endocrine System
Below listed, you can find solutions for Chapter 12 of CISCE Lakhmir Singh for बायोलॉजी [इंग्रजी] इयत्ता १० आईसीएसई.
Lakhmir Singh solutions for बायोलॉजी [इंग्रजी] इयत्ता १० आईसीएसई 12 Endocrine System Intex Quesions [Pages 198 - 207]
TEST YOUR UNDERSTANDING - 1 Fill in the Blanks
______ is an endocrine and ______ is a heterocrine gland.
Exocrine glands have ______ while ______ are ductless.
______ behaves both as endocrine and exocrine gland.
True or False.
Capillaries carry hormones to the target sites.
True or False.
The person who specialises in endocrinology is known as endocrinologist.
Multiple Choice Questions
______ system and nervous system work in close association.
Reproductive
Endocrine
Excretory
Digestive
A number of glands secrete ______, which reaches sites of action through the blood for better coordination of the body.
Enzymes
Proteins
Glucose
Hormones
One of the following is not an endocrine gland.
Salivary
Pituitary
Pineal
Ovaries
TEST YOUR UNDERSTANDING - 2
True or False.
Insulin is not a peptide hormone.
True or False.
Glucagon is responsible for the maintenance of normal blood pressure.
True or False.
The weight of the pancreas is around 100 g.
True or False.
There are five types of cells in the pancreas.
True or False.
F cells secrete 36 amino acids.
Fill in the Blanks
Diabetes mellitus is caused due to the deficiency of ______.
Alpha cell of islets of Langerhans secretes ______.
Diabetes insipidus is caused due to the deficiency of ______.
Glucagon is secreted by the ______ cells and pancreatic juice is secreted by the ______ cells of islets of Langerhans.
______ cells secrete pancreatic juice and ______ cells form islets of Langerhans which secrete ______.
THINK AND ANSWER
Can a person live without a pituitary gland?
When was the study of endocrine first started?
How did people know about diabetes mellitus?
Why is osteoporosis of ageing people connected with hormones?
TEST YOUR UNDERSTANDING - 3 Fill in the Blanks
Anterior lobe of pituitary gland is called ______.
Six hormones are secreted by the part of pituitary is ______ lobe while ______ hormone is secreted by intermediate lobe.
______ is caused due to oversecretion of growth hormone in children.
True or False.
Acromegaly is caused by oversecretion of growth hormone after adolescence.
True or False.
Posterior lobe secretes FSH and LH.
Match the Following:
| Column I | Column II |
|---|---|
| (i) ACTH | (a) Growth hormone |
| (ii) FSH | (b) Prolactin |
| (iii) LH | (c) Follicle-stimulating hormone |
| (iv) PRL | (d) Thyroid-stimulating hormone |
| (v) GH | (e) Luteinising hormone |
| (vi) TSH | (f) Adrenocorticotropic hormone |
TEST YOUR UNDERSTANDING - 4 Fill in the Blanks
There are ______ groups of steroid hormones which is secreted by adrenal ______.
Epinephrine or norepinephrine are also known as ______ or ______ hormone.
______ disease is caused by deficiency of mineralocorticoids.
______ the glucocorticoids are secreted by adrenal cortex.
______ are responsible for development of secondary sexual characteristics in both the sexes.
Give One Word Answer:
Disorder caused by high amount of sex corticoids in female.
Give One Word Answer:
Hormone that initiates stress responses.
Give One Word Answer:
Disorder due to hyposecretion of mineralocorticoids.
Give One Word Answer:
Triangular-shaped structure over kidney.
TEST YOUR UNDERSTANDING - 5
Give One Word Answer:
Shape of the thyroid gland.
Give One Word Answer:
Thyroid gland is regulated by which feedback mechanism.
Give One Word Answer:
Secretion of thyroid gland.
Give One Word Answer:
Name the disease where the person has protruding eyeballs.
True or False.
Thyroid hormone is classified into three types.
True or False.
Hormones are secreted by the exocrine cells.
True or False.
Hormones are very effective in high concentration.
True or False.
Hormones are also called autocoids.
Lakhmir Singh solutions for बायोलॉजी [इंग्रजी] इयत्ता १० आईसीएसई 12 Endocrine System EXERCISE [Pages 208 - 211]
Objective Questions
True or False.
Pituitary gland is divided into two regions: anterior and posterior lobes.
True or False.
Hormones is also called the chemical messenger.
True or False.
Takamine is the father of endocrinology.
True or False.
Adrenaline and glucocorticoids raise blood glucose level.
True or False.
ACTH is responsible to stimulate thyroid gland.
Fill in the Blanks
Gigantism is caused due to high secretion of _______ of the pituitary gland.
______, ______ and ______ are caused by the improper secretion of the growth hormone.
Deficiency of mineralocorticoids causes _______ disease.
_______ raises blood glucose level.
_______ is due to the deficiency of insulin.
Match the Following:
| Column I | Column II |
|---|---|
| (i) Neurohypophysis | (a) TSH |
| (ii) Adenohypophysis | (b) Oxytocin |
| (iii) Thyroid | (c) Milk ejection hormone |
| (iv) Oxytocin | (d) Goitre |
| (v) Adrenal virilism | (e) Sex corticoids |
Name the following:
The largest endocrine gland.
Give One Word Answer:
Hormone that is called the flight or fight hormone.
Give One Word Answer:
This gland is located at the dorsal surface of apex of kidney.
Give One Word Answer:
Pancreatic polypeptide secreted by a type of cells in pancreas.
Give One Word Answer:
Basal metabolic rate is regulated by this hormone.
Multiple Choice Questions
Cretinism is a disorder caused due to ______.
hyponsecretion of thyroxine
hyponsecretion of growth hormone
hyponsecretion of insulin
hyponsecretion of adrenaline
Which one is an emergency gland?
Testes
Pituitary
Adrenal
Thyroid
The oxytocin is responsible for the ______.
Growth
Lactation
Childbirth
Both Lactation and Childbirth
Proper normal growth of humans is induced by ______.
STH
TSH
Vasopressin
Prolactin
The anterior lobe of the pituitary gland is called ______.
Pars distalis
Pars tuberalis
Pars intermedia
Both Pars tuberalis and Pars intermedia
Reabsorption of water in the DCT of the nephron occurs in response to ______.
Oxytocin
Thyrotropin
Vasopressin
Both Oxytocinand Vasopressin
How many hormones are secreted by the adenohypophysis?
2
5
8
6
Somatostatin is an inhibitor of ______.
Insulin
Glucagon
Both insulin and glucagon
Vasopressin
Gonadocorticoids are:
Androgens
Oestrogens
Progesterone
All of these
Mineralocorticoids are responsible for:
Maintaining sodium and potassium levels in the blood
Raising blood glucose levels
Developing secondary sexual characteristics
Initiating stress responses
Given below are certain groups of terms. In each group the first pair indicates a relationship between the two terms. Rewrite and complete the second pair on a similar basis:
Insulin : Beta-cells :: Glucagon : ________
Identify the ODD term and name the CATEGORY to which the remaining three belong:
Exophthalmic goitre, Simple goitre, Cretinism, Myxoedema
Expand the following biological abbreviation:
TSH
Choose the ODD one out of the following terms given and name the CATEGORY to which the others belong:
ACTH, TSH, ADH, FSH
Descriptive Questions Short Answer Questions
Which gland is called as an emergency gland and why?
Name the endocrine gland found in our body.
Name the three types of glands with example.
Name the hormone which is responsible for proper growth in humans.
Expand the abbreviation ADH.
Write the full form of STH.
Write the full form of IST.
Write the full form of LT.
Define the following term:
Hormones
Define:
Gland
Define the following:
Endocrine gland
Define the following:
Exocrine gland
Define:
Feedback mechanism
Differentiate: Nervous control and Hormonal control.
Differentiate between the Following:
Adrenal gland and Pancreas
Differentiate: Acromegaly and Myxoedema.
Distinguish between diabetes mellitus and diabetes insipidus.
Differentiate: Endocrine gland and Exocrine gland.
Long Answer Questions
Which hormone is secreted by the gonads? Describe their role played by hormone in our body.
Explain the disorder caused by the malfunctioning of the pituitary gland.
Explain about the feedback mechanism of thyroid.
Explain the diseases occurring in:
Thyroid
Explain the diseases occurring in:
Pancreas
Explain the diseases occurring in:
Adrenal
Explain in detail:
Thyroid
Explain in detail:
Adrenal
Explain in detail:
Pituitary
Explain in detail:
Pancreas
Diagram Based Questions
Complete the table:
| Name of the Hormone | Endocrine Gland | Function |
| (i) | (ii) | Deposits extra glucose of blood as glycogen |
| Growth Hormone | (iii) | (iv) |
| (v) | Thyroid | (vi) |
| (vii) | (viii) | Prepare body for any emergencу |
| Oxytocin | (ix) | (x) |
The diagram given below represents an endocrine gland in the human body. Study the diagram and answer the following questions:

- Identify the endocrine gland. Where is it located?
- Why is the above gland referred to as the 'Master gland'?
- Name the hormone which in deficiency causes diabetes insipidus.
- Explain the term 'hormone'. What is the role of tropic hormones in the human body?
- Which lobe of the above gland secretes:
- Oxytocin
- ACTH
- Growth hormone
DO IT RIGHT
Do you know about hormonal imbalance? What are the symptoms you look to know that a person is suffering from hormonal imbalance? Both you and your friend decided to ask a medical practitioner of what exactly happens if one does not take care of it?
Visit your known practitioner and learn the consequence of such effects on human body. Then, with the help of your friend prepare a demonstration to make your friends aware of this. You can use visuals, charts, PPT presentation and handouts.
Solutions for 12: Endocrine System
![Lakhmir Singh solutions for बायोलॉजी [इंग्रजी] इयत्ता १० आईसीएसई chapter 12 - Endocrine System Lakhmir Singh solutions for बायोलॉजी [इंग्रजी] इयत्ता १० आईसीएसई chapter 12 - Endocrine System - Shaalaa.com](/images/biology-english-class-10-icse_6:7181a54a5d284da8b50dd2f92022a1f6.jpg)
Lakhmir Singh solutions for बायोलॉजी [इंग्रजी] इयत्ता १० आईसीएसई chapter 12 - Endocrine System
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