Ace the AP Psychology Test 2026 – Unlock Your Mind’s Potential!

Axons are long, slender projections of nerve cells responsible for carrying nerve impulses away from the cell body and towards other neurons or target cells such as muscles and glands. Their function is to transport messages or signals throughout the body, making option B the correct answer. Option A is incorrect because neurotransmitters are actually secreted from the axon terminals, not from the axon itself. Option C is incorrect because the filtering of blood impurities is primarily done by the kidneys and liver. Option D is incorrect because axons do not store energy, rather they require a significant amount of energy to fire and transmit messages.