Exam 32: Innate Immunity

Natural killer cells are a group of neutrophils that kill many types of tumor cells and cells infected by different kinds of viruses.

The epithelial barriers in the body are part of the innate, nonspecific defenses of the body and do not play a role in the specific immune system.

T lymphocytes release histamine, kinins, and prostaglandins at the site of an infection.

Interferon can act like a paracrine hormone that allows infected cells to send an alarm to other nearby cells.

Phagocytosis is a nonspecific defense mechanism.

One reason for species resistance is the difference in molecules on the cell membrane of different species.

Which type of cells is not involved in nonspecific immunity?

The characteristic signs of inflammation are the results of increased blood flow and increased vascular permeability.