Immune System

What is the immediate response of the immune system when bacteria invade a wound?

• Neutrophils explode to trap bacteria.

• Dendritic cells collect samples of the bacteria.

• Macrophages arrive and begin to engulf the bacteria.

• Complement proteins rip holes in the bacteria.

How do Neutrophils primarily combat bacteria in an infected area?

• They produce antibodies to neutralize the bacteria.

• They engulf bacteria and release deadly chemicals, sometimes exploding to create toxic nets.

• They act as intelligence officers, collecting samples for other cells.

• They repair damaged tissue and seal the wound.

What is the purpose of dendritic cells?

• To produce antibodies against pathogens.
• To activate T cells and initiate immune responses.

• To transport oxygen in the blood.
• To digest food particles in the stomach.

What happens after a dendritic cell activates a helper T cell?

• The helper T cell immediately attacks the bacteria.

• The activated helper T cell begins to clone itself.

• The helper T cell transforms into a macrophage.

• The helper T cell produces antibodies.

What happens when helper T cells activate the macrophages?

• Helper T cells enhance macrophage function, increasing their ability to fight infections.
• Helper T cells destroy macrophages to prevent infection.
• Macrophages become inactive and stop fighting infections.
• Helper T cells cause macrophages to produce toxins that harm the body.

What is the primary function of antibodies produced by B cells?

• To directly destroy infected cells.

• To activate helper T cells.

• To clump together and immobilize bacteria.

• To become memory cells for future immunity.

What happens to the T cells and B cells after they have fought against the pathogens?

• T cells and B cells become inactive and disappear immediately after the fight.
• T cells and B cells transform into red blood cells after battling pathogens.
• T cells and B cells become memory cells or undergo apoptosis after fighting pathogens.
• T cells and B cells multiply indefinitely after fighting pathogens.