Hormones and their role in the body


Reaching The Age of Adolescence II - Concepts
Class - 8th ISO Subjects
 
 
Concept Explanation
 

Hormones and their role in the body

Hormones and their role in the body :

Hormones are released by endocrine glands also ductless glands. Other kind of glands present in our body called as exocrine gland. A hormone released by the thyroid gland is a signal for metamorphosis in many amphibians like frogs.This hormone requires the presence of iodine in water for its production. If the water in which tadpoles are growing is deficient in iodine, the tadpoles fail to grow and cannot become adult frogs.

Hormones and their role in the body:

          Hormone

                                 Role in the body

Thyroid stimulating hormone (TSH), growth hormone (GH)

TSH stimulates the growth and functions of the thyroid gland, GH stimulates the growth and development of the body

              Insulin

It regulates the blood sugar level. Inability of the body to produce insulin in sufficient quantity may result in a disease called diabetes.

            Thyroxine

It regulates body temperature and plays an important role in growth and development. Inhability of the body produce this hormone may result in a disease called goiter, which causes swelling of the neck.

              Adrenaline

It helps in the defence of the body in emergency situations. It is also known as fight or flight hormone. 

              Oestrogen

It controls the development of secondary sexual characteristics, like development of breasts, in females.

            Testosterone

It controls the development of secondary sexual characteristics, like facial hair, in males.

 

                                        

Sample Questions
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Question : 1

The under secretion of thyroxine hormone by thyroid gland causes swelling of thyroid gland which causes swelling of the neck or larynx which is called as ______

Right Option : C
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Question : 2

Which of the following statement / statements are correct :

(a) TSH stimulates the growth and functions of the thyroid gland.

(b) Thyroxine helps in the defence of the body in emergency situations. It is also known as fight or flight hormone. 

(c) GH stimulates the growth and development of the body and secreted by adrenal gland.

(d) Oestrogen controls the development of secondary sexual characteristics, like facial hair, in males.

Right Option : B
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Question : 3

Which of the following statement / statements are correct :

(a) Testosterone controls the development of secondary sexual characteristics, like facial hair, in males.

(b) Testosterone controls the development of secondary sexual characteristics, like development of breasts, in females.

(c) Thyroxine regulates body temperature and plays an important role in growth and development.

(d) Oestrogen controls the development of secondary sexual characteristics, like development of breasts, in females.

Right Option : C
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