Mammals such as the vampire bat have the ability to generate a urine with a concentration of approximately 3,600 milliosmoles (mOsm). If the concentration of their blood is approximately 300 mOsm, by producing a concentrated urine, their water loss is
A. Reduced by approximately 11/12.
B. Reduced by approximately ½.
C. Actually increased by approximately ½.
D. Reduced by approximately 5/6.
E. Not reduced.
A. Reduced by approximately 11/12.
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The electrical difference across a neuronal membrane is measured in
A. joules. B. millivolts. C. newtons. D. milliamperes. E. milliwatts.
The two strands of DNA in a DNA double helix
a. are identical to each other. b. are connected to each other by covalent chemical bonds. c. both contain nucleotides, but the order of the nucleotides on the two strands is not related. d. are oriented in the same direction. e. are antiparallel to each other.
Of the four main tissue types, the type known as ________ covers body surfaces and lines body cavities and organs
Fill in the blank(s) with correct word
All of the following are part of the mechanism of action of alpha and beta interferons EXCEPT
A) they bind to the surface of uninfected cells. B) they are effective for long periods. C) they initiate manufacture of antiviral proteins. D) they disrupt stages of viral multiplication. E) they initiate transcription.