Multiple Choice Questions
Question 1
Cortisone hormone is secreted by :
- Medulla of adrenal
- Cortex of adrenal
- Pancreas
- Thyroid
Answer
Cortex of adrenal
Reason — The adrenal cortex secretes Cortisone.
Question 2
Which one of the following hormones stimulates the breakdown of glycogen in the liver into glucose?
- Insulin
- Adrenaline
- Glucagon
- Thyroxine
Answer
Glucagon
Reason — Glucagon stimulates the breakdown of glycogen in the liver to glucose.
Question 3
Which one of the following hormones converts excess of glucose into glycogen
- Glucagon
- Thyroxine
- Insulin
- Adrenaline
Answer
Insulin
Reason — Insulin converts extra glucose to glycogen which is ultimately stored in the liver and muscles.
Question 4
Which one of the following glands is also called the master gland :
- Pituitary gland
- Adrenal gland
- Thyroid gland
- Ovary
Answer
Pituitary gland
Reason — Pituitary gland regulates the activity of other endocrine glands. So, it is also called the "master gland".
Question 5
The emergency hormone to face the danger or to fight is secreted by;
- Islets of Langerhans
- Adrenal cortex
- Pituitary
- Adrenal medulla
Answer
Adrenal medulla
Reason — Adrenaline hormone is also called the "fight or flight hormone". It is secreted by Adrenal medulla.
Question 6
Which one of the following endocrine glands produces its hormone in large quantities as a result of emotional stimulation?
- Thyroid
- Islets of Langerhans
- Adrenal medulla
- Adrenal cortex
Answer
Adrenal medulla
Reason — Adrenal medulla secretes adrenaline (also called epinephrine or emergency hormone). This hormone is secreted when a person is under severe stress (physical or emotional).
Question 7
In humans, increased thyroxine production results in:
- Increased metabolism
- Decreased metabolism
- Dwarfism
- Cretinism
Answer
Increased metabolism
Reason — Oversecretion of thyroxine causes an increased metabolic rate.
Short Answer Questions
Question 1
What is a hormone?
Answer
Hormone is a chemical substance secreted by an endocrine gland, which is directly poured into the blood stream and acts on a target organ or cell.
Question 2
Match the items in Column A with those in Column B.
Column A | Column B |
---|---|
Cretinism | Pituitary Gland |
Diabetes Mellitus | Abnormal development of infant |
Increased metabolic rate | Oversecretion of thyroxine |
Simple goitre | Insufficient iodine in food |
Growth hormone | Insufficient insulin in blood |
Answer
Column A | Column B |
---|---|
Cretinism | Abnormal development of infant |
Diabetes Mellitus | Insufficient insulin in blood |
Increased metabolic rate | Oversecretion of thyroxine |
Simple goitre | Insufficient iodine in food |
Growth hormone | Pituitary gland |
Question 3
In table given below, fill in the blanks by naming endocrine glands, the hormones they secrete, and the function they perform, in a normal person.
S.No. | Name of the gland | Hormone produced | Function |
---|---|---|---|
1. | Thyroid | ............... | ............... |
2. | ............... | Insulin | ............... |
3. | ............... | ............... | Prepares the body for action |
4. | ............... | Growth Hormone | ............... |
Answer
S.No | Name of the gland | Hormone produced | Function |
---|---|---|---|
1. | Thyroid | Thyroxine | Control of metabolic rate |
2. | Pancreas | Insulin | Regulation of sugar in blood. |
3. | Adrenal Medulla | Adrenaline | Prepares the body for action |
4. | Pituitary | Growth Hormone | Speeds up growth |
Question 4
Name the source and the function of each of the following hormones:
Hormone | Source | Function | |
---|---|---|---|
(a) | Glucagon | ............... | ............... |
(b) | Thyroxine | ............... | ............... |
(c) | Adrenaline | ............... | ............... |
(d) | Insulin | ............... | ............... |
(e) | Cortisone | ............... | ............... |
Answer
Hormone | Source | Function | |
---|---|---|---|
(a) | Glucagon | Pancreas | Breakdown of glycogen to glucose. Raises sugar in the blood. |
(b) | Thyroxine | Thyroid gland | Control of metabolic Rate . |
(c) | Adrenaline | Adrenal Medulla | Prepare the body to face emergency, stress. |
(d) | Insulin | Pancreas | Regulation of sugar in blood. |
(e) | Cortisone | Adrenal cortex | Influence carbohydrate, fat and protein metabolism. Regulate the salt and water balance in the body. |
Long Answer Questions
Question 5
What is the difference between an exocrine gland and an endocrine gland ?
Answer
Exocrine Gland | Endocrine Gland |
---|---|
The exocrine gland sends their secretions (enzymes) through ducts directly to target organs. | Endocrine glands are ductless glands that pour their secretions (hormones) directly into the blood. |
Ex. Salivary gland, Pancreas, etc. | Ex.Thyroid, Pituitary, etc. |
Question 6
Why is Pituitary gland called the "master gland"?
Answer
Pituitary gland secretes some hormones that regulate the activity of other endocrine glands. So, the pituitary gland is also called the "master gland".
Question 7
Briefly write about the importance of physical hygiene during adolescence.
Answer
Physical hygiene plays a very important role in maintaining one's own health during adolescence. Following are some important practices for maintaining physical hygiene:
- Proper and safe food:
- To support rapid growth and development during adolescence, an adolescent should take a balanced diet including proteins, carbohydrates, fats, minerals, and vitamins. Milk, fruits and fresh vegetables should be part of the regular diet.
- Avoid stale food and excessive fast food.
- Perishable food items should be properly stored in refrigerator.
- Proper lifestyle:
- Avoid long hours of continuous table work.
- Avoid watching television and playing computer games for long hours.
- Avoid smoking and consumption of alcohol and drugs.
- Cleanliness:
- Washing hands with soap before and after meals, brushing teeth, taking regular bath, regular toilet habits should be followed.
- Clothes, especially undergarments should be changed daily. Wearing very tight clothes should be avoided.
- Eyes should be washed daily with clean and cold water. Rubbing of eyes with hands should be avoided to prevent entry of germs.
- Lack of cleanliness may lead to bacterial infection. Girls should take special care of cleanliness during the time of their menstrual cycle.
- Physical Exercise:
- All young boys and girls should walk, exercise and play outdoor games regularly.
- Physical activity is important to combat the stress and strain of adolescence.
Question 8
Briefly discuss any four activities which can be practiced to overcome stress.
Answer
Four activities which can be practiced to overcome stress are:
- Yoga — Yoga is a mind body practice that combines physical poses, controlled breathing and meditation or relaxation. It helps to reduce stress with:
- Increased flexibility.
- Increased muscle strength and tone.
- Improved respiration, energy and vitality.
- Weight reduction.
- Improved athletic performance.
- Exercise — Just 30 to 45 minutes of exercise at least three times a week can make one feel much healthier. Regular exercise can be done by running/jogging, swimming, cricket, football, hockey, etc.
- Proper sleep schedule — Sound and timely sleep helps one to reduce the level of stress.
- Reading — It is a great way to calm the mind and to gain knowledge.