When Endogenous Rhythms Are Studied by Removing All External Time

question 37

Multiple Choice

When endogenous rhythms are studied by removing all external time cues,what duration of circadian rhythm do most people adopt?

• A)approximately 23-24 hours long
• B)approximately 24-25 hours long
• C)approximately 25-26 hours long
• D)Humans are unable to maintain a normal circadian rhythm when external cues are removed.

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Definitions:

Deka-

A metric prefix denoting a factor of ten (10), used in units of measurement to indicate ten times the base unit.

10 Units

A quantifiable amount often used in medical dosing or measurement, where the unit of measure should be specified for clarity (e.g., insulin units, milliliters).

Ounce

A unit of weight in the avoirdupois system, equivalent to 28.3495 grams, commonly used in the United States and the United Kingdom.

16 Oz

A unit of weight or volume in the Imperial and U.S. customary systems, equivalent to one pound or about 0.473 liters.