The dorsal respiratory group of the respiratory center in the brain stem stimulates:

1. external intercostals	2. internal intercostals
3. diaphragm	4. rectus abdominus

Condition of the body in which the tissues are starved of oxygen is called as:

Some pathogens can reach the alveoli, they can still be destroyed by:

1. macrophages in the pulmonary lymph nodes
2. NK cells in the elastic tissues of the lungs
3. cytotoxic T-lymphocytes
4. alveolar macrophages

A minimal amount of pleural fluid present in the pleural cavity:

Oxygenated blood through the tissues of the lungs is carried by:
1. pulmonary and bronchial veins
2. pulmonary and bronchial arteries
3. pulmonary veins and bronchial arteries
4. pulmonary arteries and bronchial veins

Vagal stimulation would lead to:
1. deeper inhalation
2. forced exhalation
3. bronchodilation
4. bronchoconstriction

When the diaphragm or external intercostal muscles contract, intrapulmonary pressure should

When air leaks into the space between lung and chest wall, the result can be:
1. pneumothorax and atelectasis
2. hydrothorax and hemothorax
3. empyema and emphysema
4. pneumonitis and effusion

Air conditioning – warming, humidifying and filtering of the air, is the function performed by:

During deglutition, the food is prevented from entering into the larynx by the cartilaginous: