Ch 31 Thoracic Cavity

The thoracic cavity is under ________ pressure.

• negative

• positive

• atmospheric

• zero

What is the function of the diaphragm muscle during breathing?

• It moves up to create positive pressure

• It moves down creating a vacuum in the chest cavity drawing air into the lungs

• It contracts to collapse the lungs

• It has no effect on breathing

Damage to the chest wall allows air to rush in, causing the lungs to:

• Expand

• Collapse

• Remain unchanged

• Fill with fluid

During thoracotomy (open chest surgery), the lungs are inflated by a mechanical respirator managed by ________.

• Anesthesia

• Surgery

• Nursing

• Radiology

After surgery, the negative pressure in the thoracic cavity is maintained with a ________ drainage system, which removes air and fluid to allow lung expansion.

• closed

• open

• passive

• manual

Refer to the diagram labeled 'Negative Pressure Breathing.' Which structure is responsible for creating negative pressure in the thoracic cavity?

• Lung

• Chest wall + rib cage

• Diaphragm

• Intrapleural space

Fill in the blank: The main function of the respiratory system is to intake ______ from the air and eliminate carbon dioxide from the blood.

• oxygen

• nitrogen

• hydrogen

• helium

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5

What is ventilation?

• The transfer of oxygen from the alveoli in the lungs to the bloodstream

• The breathing process involving contraction of the diaphragm and accessory muscles and expansion of the ribs to pull air into the lungs

• The movement and absorption of oxygen molecules into body tissues

• The elimination of carbon dioxide from the blood

Fill in the blank: Diffusion (oxygen) is the transfer of oxygen from the ______ in the lungs to the bloodstream.

• alveoli

• bronchi

• trachea

• diaphragm

Fill in the blank: Perfusion (oxygen) is the movement and absorption of oxygen molecules into body tissues, also called ______.

• oxygenation

• ventilation

• diffusion

• respiration