Samacheer Kalvi solutions for Biology (Zoology) [English] Class 12 TN Board chapter 7 - Human Health and Diseases [Latest edition]

A 30 year old woman has bleedy diarrhoea for the past 14 hours, which one of the following organisms is likely to cause this illness?

Exo-erythrocytic schizogony of Plasmodium takes place in ____________.

The sporozoites of Plasmodium vivax are formed from ________.

Amphetamines are stimulants of the CNS, whereas barbiturates are ________.

Choose the correct match pair.

The Athlete’s foot disease in human is caused by ____________.

Cirrhosis of liver is caused by chronic intake of ____________.

The sporozoite of the malarial parasite is present in _______.

Where do the following events in the life cycle of Plasmodium takes place?

a) Fertilization - _________

b) Development of gametocytes - __________ 

c) Release of sporozoites - ________

d) Schizogony - _________

Paratope is an _________.

Allergy involves

Spread of cancerous cells to distant sites is termed as ____________.

AIDS virus has ____________.

B cells that produce and release large amounts of antibody are called ____________.

Given below are some human organs. Identify one primary and one secondary lymphoid organ. Explain its role.

Liver, thymus, stomach, thyroid, tonsils

Name and explain the type of barriers which involve macrophages.

What are interferons? Mention their role.

List out chemical alarm signals produced during inflammation.

Explain the process of replication of retrovirus after it gains entry into the human body.

Explain the structure of immunoglobulin with a suitable diagram.

What are the cells involved innate immune system?

What is the vaccine? What are its types?

A person is infected by HIV. How will you diagnose for AIDS?

Autoimmunity is a misdirected immune response. Justify.

List the causative agent, mode of transmission and symptoms for Diphtheria and Typhoid.

A patient was hospitalized with fever and chills. Merozoites were observed in her blood. What is your diagnosis?

Write the scientific name of the filarial worm that causes filariasis.

Write the symptoms of filariasis.

How is this disease transmitted?

List the common withdrawal symptoms of drugs and alcohol abuse.

Why do you think it is not possible to produce vaccine against 'common cold'?