Why Our Brains Love Junk Food

What was a characteristic of Australopithecus's diet and its effect on their brain size?

• They ate mostly meat, leading to a larger brain.

• They ate mostly raw fruits and vegetables, leading to a smaller brain.

• They ate cooked foods, leading to a larger stomach.

• They ate a varied diet of cooked and raw foods, leading to efficient digestion.

How did the ability to cook food benefit Homo Habilis?

• It allowed them to eat only raw vegetables.

• It made their brains smaller and more efficient.

• It enabled them to safely eat meat and access more energy from vegetables.

• It led to them developing larger teeth and stomachs.

What factor contributed to the increase in brain size in the Homo genus, from Homo Habilis to Homo Sapiens?

• A diet consisting mainly of raw, low-calorie foods.

• The development of smaller, less efficient digestive systems.

• Increasingly high-energy diets.

• A decrease in the need for calories to maintain brain function.

Why do human brains respond positively to high-fat and high-calorie foods?

• These foods activate only the touch centers in the brain.

• Our brains have evolved to love high-energy food due to evolutionary history.

• These foods are always more nutritious than low-calorie options.

• Our bodies are designed to easily process large amounts of processed foods.