Endocrine glands differ from exocrine glands in that they do NOT ___.
A. have a blood supply
B. have ducts
C. secrete chemical messengers
D. have cells
Answer: B. have ducts
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The fovea
a. is located in the exact center of the retina b. contains a greater abundance of rods than cones c. is the point on the retina at which the optic nerve leaves and blood vessels pass through d. exhibits all of the above e. exhibits only a and b
A decrease of insulin in the blood may signal satiety
Indicate whether the statement is true or false
Denise has had an accident that has damaged her hyoid bone. Which of the following conditions is she likely to experiece due to this injury?
A. Both "Denise will likely have issues with swallowing due to the association of the hyoid bone with the muscles needed to swallow" and "Denise may have issues with her speech due to the association of the hyoid bone with the muscles that function in speech" are correct. B. Denise will likely have issues with swallowing due to the association of the hyoid bone with the muscles needed to swallow. C. Denise may have issues with her speech due to the association of the hyoid bone with the muscles that function in speech. D. Denise may have issues with turning her head from side to side due to the association of the hyoid bone with muscles that move the head.
Which is NOT true about viruses?
A. They may have genetic information in the form of RNA. B. They may reside in a host cell for years without killing it. C. They may cause a host cell to become cancerous. D. They consist of a nucleic acid surrounded by a carbohydrate shell. E. They require a host cell in order to reproduce themselves.