Continuation Notes From Neurotransmitters

Drugs can be

• Agonist- make neuron fire 
• Antagonist- stop neural firing 
• Reuptake Inhibitors- block neurotransmitters from entering the Bryon 

Central Nervous System 

• The brain and spinal cord 
• CNS 

Peripheral Nervous System 

• All nerves that are not encased in bone 
• Everything but the brain and spinal cord 
• Is divided into two categories. Somatic and autonomic 

Somatic Nervous System 

• Controls voluntary muscle movement. 
• Uses motor (efferent neurons) 

Autonomic Nervous System 

• Controls the autonomic functions of the body 
• Divided into two categories.. the sympathetic and parasympathetic   

Sympathetic Nervous System 

• Fight or Flight response 
• Automatically accelerates heart rate, breathing, dilates pupils, slows down digestion. 

Parasympathetic Nervous System 

• Automatically slows the body down after a stressful event 
• Heart rate and breathing slow down, pupils constrict and digestion speeds up.

Reflexes 

The Endocrine System 

• A system of glands that secrete hormones. Similar to nervous system, except hormones work a low slower than neurotransmitters.