IMMUNITY

Question 1

Only few of the exposures to infectious agents result in disease because ________________

Answer 1

The body is able to defend itself from most of the foreign agents

Question 2

What is immunity?

Answer 2

The overall ability of the host to fight the disease - causing organisms conferred by immune system

Question 3

What are the 2 types of immunity?

Answer 3

Innate and Acquired

Question 4

What is innate immunity?

Answer 4

Non-specific type of defence present at the time of birth

Question 5

How is innate immunity accomplished by the body?

Answer 5

By providing different types of barriers to the entry of foreign agents into our body

Question 6

Innate immunity consists of how many types of barriers?

Answer 6

4

Physical, physiological, cellular, cytokine

Question 7

____________ is the main barrier which prevents entry of micro-orgs

Physical barrier

Answer 7

Skin on our body

Question 8

Mucus coating of the epithelium lining the ____________(3) tracts also helps in trapping microbes entering our body

Physical barrier

Answer 8

respiratory, gastrointestinal, urogenital

Question 9

List 3 physiological barriers that prevent microbial growth

Answer 9

Acid in stomach, saliva in mouth, tears from eyes

Question 10

List 4 cells that can phagocytose and destroy microbes

Answer 10

WBC - Polymorpho-nuclear leukocytes(PMNL - neutrophils)
WBC - Monocytes
WBC - Natural killer ( type of lymphocyte)
Macrophages in tissues