How Many Neurons Does the Brain Contain When the Toddler

question 193

Multiple Choice

How many neurons does the brain contain when the toddler is 2 years old?

• A) Twice as many as at birth
• B) Four times as many as at birth
• C) Half as many as at birth
• D) The same total number of neurons

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Definitions:

Placenta

An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the fetus while removing waste products.

Chorion

Outermost extraembryonic membrane of amniotes; major component of the placenta in placental mammals.

Epidermis

Outermost tissue layer. In animals, the epithelial layer of skin. In plants, the dermal tissue.

Mesoderm

Middle tissue layer of a three-layered animal embryo.