Concept explainers
Introduction :
Many animals, including human beings, follow a routine cycle of behavior. This is called circadian rhythm, and it affects activities like sleeping and waking up that occur daily. This cycle is maintained by an internal biological clock that tells the body about changes in day and night on a daily basis and adjusts the sleep-wake cycle.
Answer to Problem 8STP
Correct answer :
The correct answer is option (c) just before dawn.
Explanation of Solution
Explanation/justification for the correct answer :
Option (c) just before dawn. Here, as per the graph, the minimum temperature is attained between 4-8 hours. So, the correct answer is option (c).
Explanation for incorrect answer :
Option (a) after eating. After eating, the body temperature rises very fast as per the graph. So, this is an incorrect option.
Option (b) in the afternoon. In the afternoon, the body temperature is at its peak. So, this is an incorrect answer.
Option (d) late at night. The body temperature starts to fall, but not to the minimum. So, this is an incorrect answer.
Chapter 33 Solutions
Biology Illinois Edition (Glencoe Science)
Additional Science Textbook Solutions
Human Physiology: An Integrated Approach (7th Edition)
Genetic Analysis: An Integrated Approach (2nd Edition)
Human Physiology: An Integrated Approach (8th Edition)
Microbiology with Diseases by Body System (4th Edition)
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