If the human brain didn't have so many deep crevices and wrinkles in the cortex,then:
A)the amygdala would not be able to regulate the person's initial emotional responses.
B)the person would have difficulty performing bodily functions that are not consciously willed.
C)the newborn's head would be too large to fit through the mother's birth canal.
D)the fetus would die prenatally because the hypothalamus couldn't regulate the autonomic nervous system.

Question

Quizplus · Accepted Answer

The deep crevices and wrinkles in the cortex are known as sulci and gyri, respectively. They help to increase the surface area of the brain within the limited space of the skull. Without these folds, the brain would have a much smoother appearance and a much larger size, making it difficult for the fetus to pass through the birth canal during delivery. Thus, choice C is the best answer. The other options are incorrect because the amygdala can still regulate emotional responses, bodily functions can still occur without conscious control, and the hypothalamus can regulate the autonomic nervous system even without the folds in the cortex.

If the Human Brain Didn't Have So Many Deep Crevices