Body Defence Mechanisms

How many lines of defence are there in our body?

• 1

• 2

• 3

• 4

Which of the following belongs to the non-specific body defence mechanism? (You can choose more than one answer.)

• First line of defence

• Second line of defence

• Third line of defence

Which of the following is the protein produced by white blood cell?

• allergen

• antibody

• antihistamine

• antigen

Tags

NGSS.MS-LS3-1

Bacteria that are harmful to people and cause them to get sick are called _____.

• pathogen

• lymph nodes

• antibody

• immunity

Which of the following is the body’s first line of defense against disease?

• body immune system

• white blood cells

• antibodies

• skin

What is an antigen?

• A foreign substances that comes from outsides the body and induces the production of antibodies

• A foreign substances that comes from inside the body and induces the production of antibodies

• A foreign substances that comes from outsides the body and prevent the production of antibodies

Pathogens can enter our bodies through ____________ . (You can choose more than one answer.)

• respiratory system

• digestive system

• excretory system

• skin

_____________ is the ability of the body system to resist pathogens before it is infected.

• Immunity

• Pathogen

• Antigen

• Antibody

In our body, the first line of defence consists of skin and mucous membrane.

• True

• False

What is the process shown in the diagram?

• Phagocythosis

• Neutralisation

• Digestion

• Vaccination