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.


C) are involved in filtering, warming, and humidifying incoming air.

Anatomy & Physiology

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In males, both urine and male reproductive fluids travel through the ________.

A. spermatic cord B. urethra C. ductus deferens D. epididymis E. ureter

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Compact bone

A. is avascular. B. is located deep to spongy bone in the diaphysis. C. is composed of tubular units called osteons. D. has a brace-like arrangement of trabeculae. E. All of the choices are correct.

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What does structure "D" represent on the diagram?

A. Arrector pili B. Hair follicle C. Epidermis and dermis D. Subcutaneous tissue E. Sebaceous gland

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