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Question 3: Biological Clocks and Navigation .Describe the physiological basis of circadian rhythms and the mechanisms...

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Medical Sciences

Question 3: Biological Clocks and Navigation .Describe thephysiological basis of circadian rhythms and the mechanisms bywhich birds navigate during migration. Include in your answer: a. adescription of circadian rhythms and zugunruhe b. a description ofthe molecular and physiological mechanisms for entraining circadianrhythms and the timing of seasonal movements in birds c. adescription of the current hypothesis for bird navigation usingEarth’s magnetic field

Please Write 500 words atleast for the 4 parts in totalkindly.

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4.2 Ratings (484 Votes)
AWhen birds are placed in a round cage at night they show migratory restlessness or Zugunruhe The birds primarily jumpflutter in their migratory direction and when the magnetic field is turned horizontally in the absence of celestial cues the birds turn their orientation with the magnetic field This is the behavioral evidence required to show that a migratory bird species possesses and is able to use a magnetic compass A magnetic compass has been found in more or less every migratory bird species therefore it is quite safe to presume that all migratory birds and potentially birds in general possess a magnetic compassthe magnetic compass of nightmigratory birds does not separate between North and South like our ship compass but it distinguishes between toward the magnetic equator and toward the magnetic pole the Magnetic North Pole in the Northern Hemisphere and the Magnetic South Pole in the Southern Hemisphere the birds magnetic compass sense have narrow functional intensity window but this window seems to be extendable to new intensities after a few hours of adaptation to a changed    See Answer
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