Category: N
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Nonpolar covalent bond
A covalent bond in which the pair of electrons is shared equally between two atoms.
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Northern blotting method
A blot analysis technique for analyzing a small portion of RNA. Operationally, this test is identical to Southern blotting except for the target (RNA) and the specific reagents used.
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Normal blood pressure
A blood pressure between 100 and 120 mm Hg systolic and< 80 mm Hg diastolic.
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Negative blood pressure
Blood pressure that is less than atmospheric pressure, as in the great veins near the heart.
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Neuromuscular block
A disturbance in the transmission of impulses from a motor endplate to a muscle. It may be caused by an excess or deficiency of acetylcholine or by drugs that inhibit or destroy acetylcholine.
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Note blindness
The inability to recognize musical notes, due to a lesion of the central nervous system.
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Nervous bladder
A condition marked by the repeated desire to urinate, but doing so fails to empty the bladder.
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Neutral sitz bath
Same as sitz bath, except temperature is 92° to 97°F (33.3° to 36. 1°C) or for foot bath 104° to 110°F (37.8° to 40°C), duration 15 to 60 min.
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Neutral bath
A bath in which no circulatory or thermic reaction occurs, temperature 92° to 97°F (33.3° to 36.1° C).
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Nauheim bath
A bath in which the body is immersed in warm water through which carbon dioxide is bubbled.