An innate, nonspecific defense against the action of viruses that cells infected with viruses can produce is ___________.

The chemoreceptors that send sensory input to the respiratory centers are found in the following locations exceptthe ______.

The nutrient(s) required for the production of hemoglobin include ______.

An organic compound that the body needs in minute amounts is a __________.

When the right atrium contracts, the ______.

_________ are primarily used as an energy source, but unused quantities are converted into _________ and stored.

The rate and depth of breathing are affected by the following factors EXCEPT ______.

Valves are found insome ______.

What two processes combined are referred to as internal respiration?

What must be matched between donor and recipient in organ transplantation?