The respiratory mucosa is made up of
A)dense irregular connective tissue.
C)ciliated cuboidal epithelium.
D)ciliated columnar epithelium.
E)dense regular connective tissue.
Air entering the body is filtered, warmed, and humidified by the
A)upper (conducting)portion of the respiratory tract.
B)lower (respiratory)portion of the respiratory tract.
The paranasal sinuses, together with other structures of the upper respiratory tract,
A)are where a small percentage of gas exchange occurs.
B)form part of the respiratory membrane.
C)are involved in filtering, warming, and humidifying incoming air.
D)provide a large area for gas exchange between air and circulating blood.
E)are lined by a delicate simple squamous epithelium.
Functions of the respiratory system include
A)protecting respiratory surfaces from dehydration and temperature changes.
B)producing leukocytes needed to defend against invading pathogens.
C)generating neurotransmitters essential to the neural control of respiration.
D)providing erythrocytes, especially during times of increased oxygen demand.
E)melanin synthesis and utilization to shield alveoli from environmental hazards.