Question 24 of 30
The mammalian reflex refers to:
A
An increase in heart rate and respiration.
B
A decrease in heart rate and dilation of blood vessels.
C
An increase in heart rate and constriction of pupils.
D
A decrease in heart rate and constriction of blood vessels.
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Answer & Explanation
The correct answer is Option D: A decrease in heart rate and constriction of blood vessels..
The mammalian diving reflex is a physiological survival response triggered by cold water contact with the face. It causes bradycardia (decreased heart rate) and peripheral vasoconstriction (narrowing of blood vessels) to redirect oxygenated blood to essential organs like the brain and heart.