Efferent Signaling

Efferent signaling connects control center with effectors

Neuroendocrine System

• Epinephrine is a hormone in the blood

• Epinephrine is a neurotransmitter when in neural pathways

• Many ANS and endocrine systems come from hypothalamus

• Hormones and neurotransmitters cause the inhibition or release of each other

How Ach leads to adrenaline

1. Ach binds to nicotinic receptors

2. Generates action potential

3. Releases calcium into cytoplasm

4. Cellular response of release of adrenaline

Autonomic NS

Divisions of ANS

• Parasympathetic- resti & digest

• Sympathetic- fight or flight

• The two divisions work antagonistically