Eccrine sweat glands:

  1. Are innervated by parasympathetic fibers releasing acetylcholine from their post synaptic fibers
  2. Are innervated by parasympathetic fibers releasing noradrenaline from their post synaptic fibers
  3. Are innervated by sympathetic fibers releasing acetylcholine from their post synaptic fibers
  4. Are innervated by sympathetic fibers releasing noradrenaline from their post synaptic fibers