respiratory system

1. In which period is the intra-alveolar pressure at its highest value?

• mid-expiration 

• end of inspiration   

• mid-inspiration

• start of expiration

Which of the following is higher at the base of the lung when a person is upright?

• blood flow

• lung compliance 

• ventilation

• V/Q ratio

Which among the choices is not a part of the conducting regions of the respiratory tree?

• trachea

• primary bronchi

• alveoli

• tertiary bronchi

Which of the following conditions causes alkalosis?

• hyperventilation

• carbon monoxide poisoning   

• anemia

• breath holding

The primary respiratory centers are located in the:

• pons

• medulla

• midbrain

• hypothalamus

Which of the following is capable of stimulating central chemoreceptors?

• increase plasma CO2 

• increase plasma O2

• decrease plasma o2

• increased plasma hydrogen

Which among the statements below is incorrect?

• there is secretion of surfactant

• there is phagocytic activity of macrophages  

• part of the dead space area of the lungs

• in close contact with pulmonary capillaries