RBSE Solutions for Class 7 Science Chapter 6 Endocrine Glands

RBSE Solutions for Class 7 Science Chapter 6 Endocrine Glands are part of RBSE Solutions for Class 7 Science. Here we have given Rajasthan Board RBSE Class 7 Science Chapter 6 Endocrine Glands.

Board	RBSE
Textbook	SIERT, Rajasthan
Class	Class 7
Subject	Science
Chapter	Chapter 6
Chapter Name	Endocrine Glands
Number of Questions Solved	40
Category	RBSE Solutions

Rajasthan Board RBSE Class 7 Science Chapter 6 Endocrine Glands

Textbook Exercise

Multiple Choice Questions

Choose the correct option:
Question 1.
Name of endocrine gland secretes insulin:
(a) Pituitary Gland
(b) Thyroid
(c) Pancreas
(d) Adrenal
Answer:
(c) Pancreas

Question 2.
Which element deficiency in our diet causes goitre?
(a) Calcium
(b) Iron
(c) Iodine
(d) Not any
Answer:
(c) Iodine

Question 3.
What is necessary for good health in adolescence?
(a) Balanced diet
(b) Personal hygiene
(c) Physical exercise
(d) all of the above
Answer:
(d) all of the above

Fill in the Blanks:
1. Endocrine glands secretes hormones in ………….
2 …………… disease is caused by deficiency of the insulin hormone in the blood.
3. ………….. hormone prepares our body to face crises.
4. The size of the ……………… gland is large in children
Answer:
1. Blood
2. Diabetes
3. Adrenaline
4. Thymus

Short Answer Type Questions
Question 1.
Define adolescence ?
Answer:
Many changes take place in our body during the age from 11 to 18 or 19. This period is called adolescence. This is the period between childhood and adulthood.

Question 2.
If a person has a very big and bulging throat what is the likelihood of disease?
Answer:
There is likelihood of Goitre disease.

Question 3.
Which hormone deficiency causes diabetes? What is the function of this hormone?
Answer:
Diabetes is caused due to deficiency of Insulin hormone. Insulin controls amount of sugar in blood.

Question 4.
If a person has diabetes, what advice will you give him?
Answer:
We advice him to consume less sugar or sweets and the diabetic person must walk on foot for some time regularly. They physical exercise and pranamyam are helpful.

Long Answer Type Questions
Question 1.
What are the things essential for good health in adolescence? Write an article.
Answer:
Things essential for good health in adolescence:

1. Nutrition: Body grows rapidly during adolescence. During adolescence, diet of an adult must contains carbohydrates, proteins, fats, vitamins and mineral salts. The food of an adult should have Roti, rice, pulses, vegetables, Milk, Fruits, leafy vegetables, jaggery, meat, amla, oranges, iron etc.
2. Personal hygiene: Every part of body should be cleaned properly. In absence of personal hygiene, infection can be caused due to bacteria
3. Physical exercise: Walk in fresh air and playing keep our body healthy. All adults should do regular walk, exercise, and play in open.
4. Keeping away from drugs: We should keep ourselves away from poisonous substances and medicines. Bad habits destroy health, social and economic status

Question 2.
Which endocrine glands have our body. Describe them.
Answer:
The endocrine glands in our body are:

1. Pituitary
2. Thyroid
3. Parathyroid
4. Thymus
5. Pancreas
6. Adrenal
7. Pineal

1. Pituitary gland
Hormone: growth hormone. Our growth depends on the secretion of the pituitary galnd.
2. Thyroid gland
Hormone: thyroxine The function of thyroxine is to control the rate of metabolism, growth and respiration.
3. Parathyroid galnd
These are four tiny glands located on larynx. Hormone: Parathyroid hormone (PTH). It regulates calcium and phosphate in the body.
4. Thymus:
Hormone: Thymosin, Thymosin stimulates the disease-fighting cells.
5. Pancreas:
Hormone: Insulin Insulin controls sugar metabolism in the body.
6. Adrenal gland:
Hormone: Adrenalin Adrenalin regulates heart beat, breathing reat, blood pressure, etc.
7. Pinceal galnd:
Hormone: Melatonin. Melatonin influences sexual development and sleep – wake cycles. The pineal gland conects the endocrine system with the nervous system. In that it converts nerve signals from the sympathetic system of the peripheral nervous system into hormone signals.

Intext Questions

Question 1.
What is adolescence? (Page 57)
Answer:
Age from 11 to 18 or 19 is called adolescence. This is a period between Childhood and adulthood.

Question 2.
What is the reason of physical changes like moustache, increase in height etc.? (Page 57)
Answer:
These physical changes occur because of effect of some chemical substances. These substances are called hormones.

Question 3.
Some times, we come across some persons who are too tall or too short? What is the reason of such difference in height? (Page 58)
Answer:
It occurs due to hyper secretion or hypo secretion of hormone secreted by Pituitary gland.

Question 4.
Why did father buy iodised salt? (Page 58)
Answer:
Iodine is necessary for formation of thyroxine hormone. In our throat thyroid gland is located. This gland secretes thyroxin hormone. This gland requires iodine for the formation of this hormone. Goitre is caused due to deficiency of this hormone. Lack of iodin in our diet causes goiter. Iodine can be easily obtained by iodised salt. Therefore, we should consume iodised salt in our diet.

Question 5.
Why doctor advised Teacher for low sugar consumption? (page 58)
Answer:
The Teacher has Diabetes. By consuming more sugar, the effects of this diseases increases. This may be harmful. Therefore, diabetic patients are advised to consume less sugar.

Question 6.
We usually feel sleep at a definite time during night and in the morning at a definite time got up. Why does this happen? (page 58)
Answer:
There is a very small gland in the center of our brain. This glang secretes a hormone called metatonin. Our sleep-wake cycle is regulated by metatonin hormones. This is why we feel sleepy at a certain time at night and get up in the morning a certain time.

Activity

Question 1.
Prepare a list of endocrine glands and fix in a class room.
Answer:
Do yourself.

Question 2.
Prepare a chart of location of endocrine glands in our body and fix it in a classroom.
Answer:
Student should prepare a chart and put it in classroom.

Question 3.
Identify patients with hormone deficiency or excess in our local area. Prepare a list and as possible as get them examined by physician.
Answer:

Radheshyam	Excessiveb obesity	Excess of growth homone
Banni singh	Diabetes	Hypo secretion of insulin
Sudhir	Goitre	hypo secretion of thyroxine
Upendra	dwarfness	deficiency of growth hormone

Question 4.
Prepare a table on chart to demonstrate endocrine glands, their hormones, functions of hormones and excess and deficiency of hormones secretion.
Answer:

Gland	Hormones	Functions	Excess/ deficiency
1. Pituitary gland	Growth hormone	Growth, catalyst in protein synthesis	Deficiency causes dwarfness and excess causes excess height even more than eight feet height
2. Thyroid gland	Thyroxine	regulates metabolism	Deficiency in children causes Cretinism, excess causes Grabe’s disease.
3. Pineal gland	Melatonin	control on sleep and awake	Excess or deficiency causes irregularity in sleep.
4. Pancreas	Insulin	Control on glucose metalbolism	Deficiency causes Diabetes, excess secretion cause low. sugar level.
5. Adrenal gland	Adrenaline	Regulates heart beats	Deficiency causes low blood pressure, hyper secretion causes high blood pressure.
6. Parathyroid gland	parathormone	regulates Calcium or Phosphorous level in blood	deficiency causes low calcium and high phosphorous level, excess causes high calcium level and low phosphorous level.
7. Thymus gland	Thymosin	Immunity and growth of sex organs	Deficiency causes less growth of sex organs. Excess causes over growth of sex organs.

Other Important Questions

Multiple Choice Questions
Question 1.
The substances secreted by endocrine glands are called
(a) Catalyst
(b) Enzymes
(c) Hormones
(d) Excretory substances
Answer:
(c) Hormones

Question 2.
Essential for production of thyroxine hormone
(a) Iron
(b) Iodine
(c) Calcium
(d) Salt
Answer:
(b) Iodine

Question 3.
Emergency hormone is
(a) Thyroxine
(b) Insulin
(c) Adrenaline
(d) Parathyroid
Answer:
(c) Adrenaline

Question 4.
The number of parathyroid gland is
(a) one
(b) two
(c) Three
(d) four
Answer:
(d) four

Question 5.
It regulates calcium level in blood
(a) Insulin
(b) Parathyroid hormone
(c) Adrenaline hormone
(d) Thyroxine
Answer:
(b) Parathyroid hormone

Fill in the blanks:
1. Physical changes occur due to some chemical substances known as ………..
2. Thyroid gland secretes ……………. hormone.
3. Thymus gland secretes …………….. hormone.
4. Our sleeping cycle is regulated by …………… hormone.
5. AIDS is caused by virus called …………..
Answer:
1. Hormone
2. Thyroxine
3. Thymosin
4. Melatonin
5. H.I.V

Very Short Answer Type Questions
Question 1.
Which changes occur during adolescence?
Answer:
Moustache, pimples, increase in height etc are physical changes occur during adolescence.

Question 2.
What happens if deficiency of growth hormone takes place in childhood?
Answer:
The person remains dwarf.

Question 3.
What is the reason for Goitre disease?
Answer:
Goitre is caused due to deficiency of iodine in body.

Question 4.
What are the symptoms of goitre disease?
Answer:
In goitre, throat of a person because swoolen.

Question 5.
Which hormone is secreted by parathyroid hormone?
Answer:
Parathormone is secreted by parathyroid gland.

Question 6.
What is the function of parathyroid hormone?
Answer:
It regulates the calcium level in blood.

Question 7.
Where is Pituitary gland situated?
Answer:
It is situated in brain.

Short Answer Type Questions
Question 1.
Where is Adrenal Gland situated? Write the name and function of hormone secreted by it.
Answer:
The adrenal glands are small glands located on top of each kidney. It secretes hormone named Adrenaline. It makes body ready for emergency situations. It regulates blood pressure in the body.

Question 2.
Where is thymus gland situated? Write the name and function of hormone secreted by it.
Answer:
The thymus is located in the upper anterior (front) part of our chest directly behind our sternum and between our lungs. In children, this gland is large. It secretes hormone named thymosin. In childhood, it helps in development of sex organs. It also develops immunity in the body.

Question 3.
“We should not consume drugs”. Write a short note on this.
Answer:
If any one says that a particular drug will help you to relieve mental stress, then you should say ‘No’ to them if it is not prescribed by the doctor. These are drugs which make us addicted to them. If you consume them once, you will urge to take it again. It destroys health, social, mental and economic status of an individual.

Question 4.
What is AIDS? What is its reason?
Answer:
AIDS is an incurable disease. It is caused by a harmful virus H.I. V. It spreads in a healthy person from an infected person by also used syringe.

Long Answer Type Questions
Question 1.
1. We sometimes observe people who are dwarf and some are very tall. Give reasons.
2. Why Goitre is caused? Explain.
Answer:
1. We sometimes observe people who are dwarf and some are very tall. It occurs due to secretion of growth hormone. This hormone regulates growth of body. If there is deficiency of this hormone in childhood, the person will become dwarf. In some person, secretion of growth hormone takes place more than normal, then a person may be more than 8 feet long.

2. In our body, thyroid gland is found. This gland secretes hormone called thyroxine. Iodine is necessary for formation of this hormone. If there is deficiency of iodine in our food, a disease called Goitre is caused. In this disease, neck become swollen. To prevent this, we should consume iodised salt.

Question 2.
Write the name and functions of hormones secreted by Pancreas and Pineal gland.
Answer:
The pancreas is a long flattened gland located deep in the belly (abdomen). It secretes hormone called Insulin. This hormone regulates sugar level in our body. Hypo secretion of this hormone increases sugar level in our body and a disease called Diabetes is caused. Diabetic patients are advised not to consume more sugar. Pineal gland is a small gland which is situated in our brain. Pineal gland secretes hormone called Melatonin. This hormones regulates our sleep cycle and other such processes. It also regulates secretion of sex hormones.

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