Immune System Lesson

The resistance to specific pathogens is ________.

• allergies

• antibodies

• immunity

• antigens

A(n) _______ puts weakened or dead pathogens in the body, usually by injection or by mouth.

• vaccination

• antibodies

• immunity

• antigens

_________ is the introduction of antibodies that were produced outside the body.

• Passive immunity

• Antibodies

• Active immunity

• Antigens

The second line of defense in the immune system is ________.

• specific

• nonspecific

The third line of defense in the immune system is ________.

• specific

• nonspecific

Pathogens are...

• Foreign substances that attack the body.

• White blood cells that attack foreign substances that enter the body.

• A type of internal defense mechanism in the immune system.

T cells are made in the___________. (Be careful!)

• bone marrow

• spleen

• thymus

• tonsiles

Where do T cells mature?

• lymph node

• bone marrow

• thymus

• liver

The organ where T cells complete their development is called the ________.

• lymph

• tissue fluid

• lymph node

• thymus

• spleen

Like all other body systems, the immune system helps the body maintain homeostasis. Which statement best describes how the immune system does this?

• it protects other organs and tissues from infection and disease

• it breaks down food to provide cells with nutrients

• it gathers information through the senses and controls all other body systems

• it transports oxygen and carbon dioxide