Exam 32: Nonspecific Innate Host Resistance

Which of the following is not a way in which fever augments the host's defenses?

A class of pathogen recognition receptors that function exclusively as signaling receptors are known as the ______________ receptors.

The alternate complement pathway plays an important role in

____________ are a group of cytokines produced by some eukaryotic cells in response to a viral infection.

The lungs are protected from microorganisms by

In birds, the __________ of Fabricius is where B cells undergo maturation.

Lymphoid tissues are always highly organized cellular complexes.

Which of the following is a physical barrier in the nonspecific defense of a mammalian host?

The lower genitourinary tract is usually free of microorganisms.

Complement mediated lysis is achieved by

The average adult has approximately 100,000 leukocytes per mm³of blood.

Reactive oxygen intermediates and reactive nitrogen intermediates produced by phagocytic cells are effective in killing invading microorganisms.

Dendritic cells

The bacteriocins produced by Escherichia coli are called colicins.

An intraepidermal lymphocyte migrates to a lymph node and matures into a dendritic cell after phagocytosing an antigen.

The lymph nodes lie at the junctions of lymphatic vessels where they filter out microbes and antigens from the lymph.

Natural killer cells specifically kill which of the following?

The innate response resists a particular foreign agent; moreover, innate immune responses improve on repeated exposure to the agent.

Lactobacillus contributes to the antimicrobial defenses for the adult female reproductive tract by making lactic acid to lower the pH.