Rapid changes to skin color in many vertebrates is under the control of ________.
A) melanocyte-stimulating hormone
B) adrenocorticotropic hormone
C) thyroxine
D) melatonin

Question

Quizplus · Accepted Answer

Melanocyte-stimulating hormone is responsible for regulating skin color in many vertebrates, causing rapid changes in pigmentation. This hormone stimulates the production and dispersion of melanin, which determines skin color. Adrenocorticotropic hormone and thyroxine can also affect skin pigmentation but do not cause rapid changes like melanocyte-stimulating hormone. Melatonin is mainly involved in regulating sleep and circadian rhythms and does not directly affect skin color.

Rapid Changes to Skin Color in Many Vertebrates Is Under