Which experimental manipulation would make a mammal arrhythmic?
A) Maintenance in complete darkness
B) Maintenance in complete darkness with short pulses of light administered every 24 hours
C) Maintenance in complete darkness and at constant temperature
D) Destruction of the suprachiasmatic nuclei
E) Destruction of the medial preoptic area

Question

Quizplus · Accepted Answer

Destruction of the suprachiasmatic nuclei is known to disrupt the circadian rhythm in mammals, leading to arrhythmia. The suprachiasmatic nuclei are considered the master pacemaker of the biological clock, and their destruction can lead to a breakdown in the timing of various physiological and behavioral processes. The other options may affect the timing of the circadian rhythm, but they are not known to cause arrhythmia.

Which Experimental Manipulation Would Make a Mammal Arrhythmic