Wht happens in barrier method of birth control? List its types. What are the agents utilised in chemical barrier mthod?

List various natural methods of birth control.

What is the purpose of barrier method of contraception?

Mention any two chemical barriers used in contraceptive method.

Endocrine glands control and co-ordinate the body functions through secreting certain chemical messengers called hormones. Due to certain physiological reasons, the blood glucose level of otherwise normal persons increases. What is the chemical nature of this hormone? Discuss its role in the body.

Read the given statements carefully. (i) Innate immunity is a specific type of defence, that is present at the time of birth. (ii) Malignant malaria is caused by Plasmodium falciparum. (iii) Malaria could be confirmed by Widal test. (iv) Active immunity is slow and takes time to give its full effective response. (v) Saliva in the mouth acts as physiological barrier for pathogens. Which of the above statements are correct ?