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प्रश्न
Pineal gland is an endocrine gland, write its role.
उत्तर
The pineal gland or epiphysis cerebri or conarium is located behind the third ventricle of the brain. It is formed of parenchymal cells and interstitial cells. It secretes the hormone, melatonin.
It plays a central role in the regulation of the circadian rhythm of our body and maintains a normal sleep-wake cycle. It also regulates the timing of the sexual maturation of gonads. It also influences metabolism, pigmentation, menstrual cycle, and defense mechanism of our body.
संबंधित प्रश्न
Diagrammatically indicate the location of the various endocrine glands in our body.
| Hormones | Target gland |
| Thyrotrophin (TSH) | ______ |
Give an example of hypercalcemic hormone.
Give an example of gonadotrophic hormones.
Give an example of a blood pressure lowering hormone.
add a note on deficiency of thyroxine.
_______ maintains basic metabolic rate.
(A) Thyroxine
(B) ADH
(C) GH
(D) Oxytocin
In the 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 | produced | Function |
| 1. | Thyroid | ||
| 2. | Insulin | ||
| 3. | Preparing the body for action | ||
| 4. | (i) Growth hormone (ii) Thyroid-stimulating hormone |
Define the following:
Endocrine glands
Draw an outline figure of the human body and show the location of different endocrine glands.
Given alongside is an outline diagram of human body showing position of certain organs.
 |
- Name the parts numbered 1 to 4.
- What is common to all these parts in regard to the nature of their functions?
- Name the nutrient element which is essential for the normal working of part 2.
Give the special function of the following:
Corpus luteum
Which glands are responsible for the following disease?
(i) Goitre (ii) Diabetes mellitus (iii) Gigantism
(iv) Diabetes insipidus (v) Cretinism (vi) Exophthalmic goiter
Name the hormones secreted by the following glands:
(i) Anterior pituitary
(ii) Testes
(iii) Ovary
(iv) Adrenal cortex
(v) Pancreas
Name the hormone responsible for the following function:
Increased reabsorption of water in the kidneys
Make a table indicating the glands, hormones produced, their main functions and diseases caused due to their hypo and hypersecretions.
What is a hormone?
What are the general properties of hormones?
Name the different endocrine glands found in the body of man.
Hormones are called ‘chemical messengers’.
The release of progesterone in the urine is an indication of pregnancy. Explain.
Differentiate: Cretinism and Myxedema.
Differentiate: Acromegaly and Myxedema.
Give the Technical Term: Name the glands which secrete the following hormone: Testosterone
Give the Technical Term: Name the glands which secrete the following hormone: Relaxin
Given below is an outline of the human body showing the important glands.
(i) Name the glands marked 1 to 5.
(ii) Name the hormone secreted by 2. Give one important function of this hormone.
(iii) Name the endocrine cells present in part 3.
(iv) Name the hormone secreted by part 3. Give one important function of this hormone.
Study the diagram given below and then answer the questions that follow:
 |
- Name the cells of the pancreas that produce (1) glucagon (2) insulin.
- State the main function of (1) glucagon and (2) insulin.
- Why is the pancreas referred to as an exo-endocrine gland?
- Why is insulin not given orally but is injected into the body?
- What is the technical term for the cells of the pancreas that produce endocrine hormones?
- Where in the body is the pancreas located?
The sketch below shows a certain condition in an individual:
(i) Name the condition.
(ii) What is the underlying cause of this condition?
(iii) Name two other conditions that could have resulted due to a similar cause.
(iv) Which hormone is required for iodine synthesis?
(v) Where is the thyroid gland located?
(vi) The hormone secreted by the thyroid gland is controlled from which hormone?
Choose the Odd One Out
Choose the Odd One Out
Choose the Odd One Out
The maintenance of constant internal environment is referred as ______.
A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abnormal skin. This is the result of ______.
Write the role of oestrogen in ovulation?
Briefly explain the structure of thyroid gland.
Comment on the functions of adrenalin.
In humans, the life processes are controlled and regulated by
Label the endocrine glands in the given figure.
Define the following term:
Endocrine system
