Which type of material is NOT transported by the blood? Select one: a. blood gases b. nutrients c. lactic acid d. neurotransmitters e. hormones

Answer: Option D) neurotransmitters

Explanation:

Neurotransmitters are secreted from the terminal of a neuron and bound by a specific receptor protein in the next neuron. They exists within the neurons of the brain, and NEVER come in contact with blood.

Examples include acetylcholine, glutamate, glycine etc.