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प्रश्न
Hormones are known as chemical messenger. Justify.
उत्तर
Hormones are released into the bloodstream and circulated as chemical signals. These act specifically on certain organs or tissues called target organs or tissues. These speed up or slow down or alter the activity of target tissues or organs. Hence they are known as chemical messengers.
संबंधित प्रश्न
Diagrammatically indicate the location of the various endocrine glands in our body.
| Hormones | Target gland |
| Thyrotrophin (TSH) | ______ |
| Hormones | Target gland |
| Melanotrophin (MSH | ______ |
Fill in the blank:
Hormones are produced by ____________.
Define the following:
Endocrine glands
Mention which of the statements are true (T) and which are false (F). Give reason in support of your answer.
There are two kinds of diabetes (mild and severe) related with two different hormones.
How do endocrine glands differ from other glands?
Mention three important differences between the action of hormones and that of nerves in the regulatory mechanism of our body.
Which one of the following statement is true/ false?
The pituitary gland is both exocrine and endocrine in function.
Define the following:
Exocrine gland
Name the hormone responsible for the following function:
Regulates the functioning of the male and female reproductive organs
Name the hormone responsible for the following function:
Increased reabsorption of water in the kidneys
Choose the correct answer:
Which one of the following is not an endrocine gland?
Choose the correct answer:
An organ, tissue or cell where a hormone produces its effects is known as __________
What do you mean by endocrine system?
Complete the following:
| Gland/Organ | Hormone | Function |
| (i) Stomach | __________ | __________ |
| (ii) Parathyroid | __________ | __________ |
| (iii) __________ | __________ | Lowers blood sugar level. |
| (iv) Adrenal medulla | __________ | __________ |
| (v) Pancreas (Alpha cells) | __________ | __________ |
| (vi) Testes | __________ | __________ |
Complete the table given below by filling in the blanks numbered 1 to 8.
| Gland | Hormone Secreted | Effect on Body |
| 1 | 2 | Regulates basal metabolism |
| Pancreas (β-cells) | 3 | 4 |
| 5 | 6 | Increases heart beat |
| 7 | Thyroid stimulating hormone | 8 |
Hormones are called ‘chemical messengers’.
Give the Technical Term: What are the substances that control the growth and development in animals?
Give the Technical Term: What are releasing hormones?
Give the Technical Term: Name the structure which produces testosterone.
Give the Technical Term: Name the glands which secrete the following hormone: Progesterone
Fill in the Blanks:
Nervous system and ______ are very closely related.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Hormones are produced by endocrine gland.
Place the words at the bottom of the page next to the number that shows the location of the Endocrine Glands.
(1) ________
(2) ________
(3) ________
(4) ________
(5) ________
(6) ________
(7) ________
(8) ________
(9) ________
Pancreas Hypothalamus Pituitary Parathyroid Ovaries Adrenal Thyroid Thymus Testes
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?
State the Function
Progesterone
Choose the Odd One Out
Which organ acts a temporary endocrine gland in females?
Why do we hiccup and cough sometimes when we swallow food?
Which of the following gland is related with immunity?
Write the role of oestrogen in ovulation?
Growth hormone is important for normal growth. Justify the statement.
Predict the effects of removal of pancreas from the human body.
Label the endocrine glands in the given figure.
Which one of the following statements is correct?
Choose the odd one out from series and write the category of the remaining terms:
