Respiration

All of the following occurs during inspiration EXCEPT

• Diaphragm contracts

• external intercostal muscles contract

• Thoracic cavity contracts

• Pressure in the lungs decrease

Increased mucus may lead to:

• Decreased air flow

• Increased air flow

Increased vessel radius will:

• Decrease air flow

• Increase air flow

The following is/are aspects of the respiratory zone EXCEPT

• Nasal cavity

• Alveoli

• Trachea

• Terminal bronchioles

Decreased elastic tissue at the alveoli may lead to:

• More oxygenated blood

• Less oxygenated blood

Intra-alveolar pressure exceeds atmospheric pressue:

• At rest

• During inhalation

• During exhalation

In order to inhibit normal inhalation:

• Inhibit the diaphragm

• Inhibit the external intercostal muscles

• Inhibit the somatic motor neuron innervating the diaphragm

• Inhibit the somatic motor neuron innervating the internal intercostal muscles

The ribs are pulled _______ during exhalation:

• down

• up

Exhaling is harder in ______ disease, since the airways are ______

• restrictive, constricted

• restrictive, dilated

• obstructive, constricted

• obstructive, dilated

Bronchodilators may be used to treat:

• Obstructive disease

• Restrictive disease