What causes exhalation? a signal from the medulla to the mouth and nose
a signal from the alveoli to the medulla
a signal from the diaphragm to the medulla
a signal from the medulla to the lungs

Think of five people whom you consider socially successful. write their names in the space below.

When considering the claim that eating well to reduce stress, what advice might you give a friend who appears to be stressed about an upcoming exam, but chooses to have chips and soda for lunch everyday?

A92-year-old man with a 45-year history of chronic obstructive pulmonary disease is intubated in the icu because of a bout of viral pneumonia that fails to improve after 72 hours of antibiotics. although the inspired fraction of oxygen is 100%, the patient's po2 remains at 57 mmhg. positive-end expiratory pressure (peep) is added to allow the inspired fraction of oxygen. twelve hours after the introduction of peep the patient suddenly become hypotensive. at the same time, his oxygen saturation drops from 92% to 61%. on physical examination, his bp is 80/50 mmhg and his pulse is 124/min. he has distended neck veins and distant heart sounds. which of the following would also most likely be seen on this patient's physical examination? - absence of breath sounds in the right hemithorax- high amplitude carotid artery upstroke- a pleural friction rub- pulsus alternans- splenomegaly