March 16, 2014
The Nervous System- starts with an individual nerve cell called a neuron
How does a neuron fire?
-resting potentionial: slightly negative charge
-reach the threshold when enough neurotransmitters reach dendrites
-it's an electrochemical process
-chemical outside the neuron
The All-or-nothing Response:
- the idea that either the neuron fires or it doesn't, no part way firing
*Like a gun
4 Types of Neurotransmitters:
-Acetylcholine(ACH): deals with motor movement and memory, lack of ACH linked to. Alzheimer's
-Dopamine: deals with motor movement and alertness,
*lack of dopamine linked to Parkinson's
*too much linked to schizophrenia
-Serotonin: involved in mood control
*lack of serotonin linked to depression
-Endorphins:involved in pain control
*most addictive drugs deals with endorphins
Drugs can be: Agonists-make neurons fire
Antagonists-stop neural firing
Three Types of Neurons:
-Sensory Neurons: (Afferent Neurons) take information from the senses to the brain
-Inter Neurons: take messages from sensory neurons to other pars of the brain or motor neurons
-Motor Neurons: (Efferent Neurons) the information from brain to the rest of the body
Central Nervous System: brain and spinal cord, made up of these two
Peripheral Nervous System: All nerves that are not encased in bone. Everything but spinal cord and brain. *Divided into Autonomic and Somatic.
Somatic Nervous System: voluntary muscle movements
*uses motor neurons
Autonomic Nervous System: controls that automatic functions of the body. Divided into two categories.... Sympathetic and Parasympathetic
-Endorphins:involved in pain control
*most addictive drugs deals with endorphins
Drugs can be: Agonists-make neurons fire
Antagonists-stop neural firing
Three Types of Neurons:
-Sensory Neurons: (Afferent Neurons) take information from the senses to the brain
-Inter Neurons: take messages from sensory neurons to other pars of the brain or motor neurons
-Motor Neurons: (Efferent Neurons) the information from brain to the rest of the body
Central Nervous System: brain and spinal cord, made up of these two
Peripheral Nervous System: All nerves that are not encased in bone. Everything but spinal cord and brain. *Divided into Autonomic and Somatic.
Somatic Nervous System: voluntary muscle movements
*uses motor neurons
Autonomic Nervous System: controls that automatic functions of the body. Divided into two categories.... Sympathetic and Parasympathetic
The neurotransmitters that fires in our body can help us out a lot. ACH is the reason why some of us pass these psychology tests! Dopamine helps you get through the day with a positive attitude.. at times. Serotonin helps you from falling into a pit of depression. But I have a question. Are we able to experience all of these neurotransmitters at the same time? By the way, you said there were 4 types of neurotransmitters when you only listed 3.
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