Macrophages develop from circulating blood cells called:

In cell-mediated immunity, infected host cells are directly attacked by:

Atrial natriuretic peptide (ANP) is a hormone released by the atria of the heart that:

The pulse rate is a direct reflection of the:

Memory T cells produce antibodies.

Which of the following substances is found in plasma but is not usually in the tubular fluid?

Veins always:

During late development the foramen ovale will develop into a one way flap or valve. This will slam shut with the first few breaths and become the __________________ in the newborn.

The pulse rate is a direct reflection of the:

Vasodilation of the blood vessels in the skin will result in a higher body temperature.