Heat transfer from the body directly to the environment without physical contact is called:

Why is a small pneumothorax in the chest of a supine, mechanically ventilated patient sometimes difficult to detect via chest radiography?

A. because most of the pulmonary perfusion accumulates in the bases B. because the patient generally cannot take a deep breath in the supine position C. because the air often accumulates over the anterior surface of the chest D. because the air tends to collect in the apices of the lungs

A positive Nikolsky sign may be seen in which of the following conditions?

a. Histoplasmosis b. Major aphthae c. Minor aphthae d. Mucous membrane pemphigoid e. None of the above