NEET BIOLOGY

BIOLOGY IN HUMAN WELFARE

HUMAN HEALTH AND DISEASE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How does the body build immunity?
A
by receiving immunity from a mother
B
through vaccinations
C
by building memory cells
D
all of the above
Explanation: 

Detailed explanation-1: -The acquired immune system, with help from the innate system, makes special proteins (called antibodies) to protect your body from a specific invader. These antibodies are developed by cells called B lymphocytes after the body has been exposed to the invader. The antibodies stay in your child’s body.

Detailed explanation-2: -This type of immunity is present by birth in an individual. This is activated immediately when the pathogen attacks. Innate immunity includes several barriers and defence mechanisms that keep foreign particles out of the body.

Detailed explanation-3: -All cells of the immune system are created in the bone marrow from a common type of starting cell, called a stem cell. These stem cells later develop into specific cell types, including red blood cells, platelets (important for blood clotting), and white blood cells (important for immune responses).

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