physiology of respiration

Which of the following statements could be applied to “external respiration”?

• exchange of gases between alveolar air and the blood in pulmonary capillaries.

• exchange of dissolved gases between blood in tissue capillaries and the body tissues.

• the production of CO² from organic molecules in the cells by using O² .

• the inhalation of atmospheric air into the lungs followed by exhalation.

exchange of respiratory gases between the alveoli and the blood in the pulmonary capillaries is known as

• pulmonary ventilation

• pulmonary gas exchange

• gas transport

• tissue gas exchange

Air flows into the body during expiration because

• atmospheric pressure is greater than intrapulmonary pressure.

• intrapulmonary pressure is greater than atmospheric pressure.

• intrapleural pressure is greater than intrapulmonary pressure.

• intrapleural pressure is greater than atmospheric pressure.

Gas exchange takes place in the:

• larynx

• bronchioles

• alveoli

• pleura

the thin barrier that oxygen and carbon dioxide diffuse across during during gas exchange between the alveoli and the blood in the pulmonary capillaries

• stratified squamous epithelium

• diaphragm

• pleural cavity

• repiratory membrane

What is the function of the cilia on the cells that line the bronchial tree?

• They help mix the inhaled fresh air with the residual air contained in the bronchial tree.

• They slow the movement of air to allow for efficient exchange of gases.

• They move the mucus on the cell surface up out of the bronchial tree.

• They filter particles from inhaled air.

Which Structure has the centers that regulate respiration

• Cerebral Cortex

• Diencephalon

• Brain Stem

• Cerebellum