Tissues with lower metabolic rates have fewer capillaries than tissues with higher metabolic rates.

The amount of blood ejected from the heart with each ventricular contraction defines the ______________.

This class of antibodies is mainly found in sweat, tears, breast milk, and gastrointestinal secretions.

The cortex of lymph nodes contains lymphatic nodules that have B cells in their germinal centers.

Which of these provides the body with a mechanical barrier as a defense mechanism?

What is the mechanism of action of interferons?

This will lead to inflammation, attraction of phagocytes, and enhancement of phagocytosis, and involves a large cascade of protein activation.

As the peripheral resistance decreases, the blood pressure _____________.

T lymphocytes are produced in the ______________ and mature in the ______________.

This class of cells includes macrophages, B cells and dendritic cells.