Explain how a pathogen entering through the respiratory tract is defended against by innate immunity.

Phagocytosis begins with:

Cellular immunity is best at fighting:

Describe how fever and antibodies work together to fight infection.

Explain how toxins trigger immune responses.

Compare how innate and adaptive defenses respond to viral infections.

Explain how antigenic variation impacts adaptive immunity.

Clonal selection results in:

Describe how antigen presentation connects innate and adaptive immunity.

Which is the most common portal of entry for pathogens?