The adrenal glands produce a class of chemicals that includes the neurotransmitters dopamine, norepinephrine, and epinephrine.

You find a fossil that you are sure shows evidence of bipedalism. you know this because which of the following anatomical traits is present? a. thighbones that angle in toward the knees b. a narrow pelvis c. opposable hallux d. posterior position of the foramen magnum