a. Goitre
Answer
b. Thyroxine
c. Thyroid
It is the period of when the adolescents feel insecure and confused. Try to be self-independent. Develops their own opinions. The mood swings and behavioural changes are due to the hormones. So, all these can tempt them to take drugs.
Answer
i. metamorphosis of frogs
Answer
ii. insects/ silkworm
iii. thyroxine
No they are not eating healthy. they are consuming junk foods which will cause them diseases like cyst in ovary, diabetes, heart disease and will make them obese.
Answer
During puberty, the human body undergoes several changes, but the most important hanges which marks puberty is that boys and girls become capable of reproduction.
Answer
female skeleton has wider hips unlike males that help others to identify.
Answer
No it is not permanent. uterus thickening happens every month in anticipation of the foetus, however when there is no fertilisation, the uterine wall degenerates and is released from the body as blood and mucus.
Answer
Boys have deep voice as they have adams apple highly developed unlike girls.
Answer
ermanent. uterus thickening happens every month in anticipation of the foetus, however when there is no fertilisation, the uterine wall degenerates and is released from the body as blood and mucus.
If water lacks iodine, tadpoles fail to develop into adult frogs.
Answer
on certain age of puberty both boys and girls reach a common age, where they develop mentally and sexually. That is why after reaching certain maturity marriage should be performed.
Answer
AIDS is caused by a dangerous virus called HIV , this virus can pass on to a normal person from an infected person by Infected blood, Infected needles, sexual contact, Infected mother to her baby before birth, Injectable Drug Abuse.
Answer
shoulder broadens, chest widens.
Answer
oestrogen.
Answer
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 goitre.
Answer
adrenaline- adrenal gland
Answer
Growth hormone- pituitary gland
Keep body fit and healthy, builds up stamina.
Answer
It is addictive in nature, it can ruin health, harm the body.
Answer
If growth hormone is secreted less then an abnormally short stature a condition called dwarfism takes place.
Answer
Balanced diet contains all nutrients in right proportion, it is essential for mental and physical growth.
Answer
i. Testosterone regulates sperm production in the males.
Answer
ii. Oestrogen regulate the menstrual cycle.
This Reaching the age of adolescence class 8 Extra Questions is prepared keeping in mind the latest syllabus of CBSE . This has been designed in a way to improve the academic performance of the students. If you find mistakes , please do provide the feedback on the mail.