The middle or muscle layer of a vessel is called the:

Which one of the following is a benefit of using a humidification system when administering oxygen?

A) Humidification reduces the chances of respiratory infection. B) Oxygen therapy is less drying to the upper respiratory tract. C) Increased diffusion of oxygen occurs across the respiratory membrane. D) A higher flow rate can be used with a nasal cannula when humidification is added.

The more acidic the blood is, the more readily hemoglobin:

A) binds carbon dioxide. B) releases oxygen. C) releases carbon dioxide. D) binds oxygen.