The ________ system exchanges oxygen and carbon dioxide with the air, whereas the ________ system transports oxygen and carbon dioxide throughout the body
A) respiratory; digestive
B) respiratory; urinary
C) respiratory; circulatory
D) circulatory; urinary
E) circulatory; digestive
C
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The flat-shaped cells found covering the skin are __________ in shape.
A. cuboidal B. columnar C. cylindrical D. squamous E. spherical
Artificial joints are built of
A. proteins for small joints and carbohydrates for large joints. B. silicone polymers for large joints and metals for small joints. C. silicone polymers for small joints and metals for large joints. D. glucosamine and chondroitin.
A chemical that can conduct electrical current when dissolved in water is called a(n)
a) isotope. b) isomer. c) compound. d) electrolyte e) valence molecule.
What cells of the stomach secrete pepsinogen?
a. stem cells b. mucous cells c. goblet cells d. parietal cells e. chief cells