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How is the nervous system divided?
- 1. Central Nervous System (CNS)
- 2. Peripheral (PNS)
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the CNS consists of: +notes
- - brain
- - spinal chord
- "CNS is where the action occurs"
- Plasticity
- Can undergo changes without our awareness of them
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Autonomic, sympathetic, and parasympathetic nervous systems do what?
- Autonomic: Involuntary
- Sympatheic: Arousing
- Parasympathetic: Calming
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The 3 main functions that the CNS are:
- 1. Circulatory system
- 2. Respiratory system
- 3. Reflex system
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What 3 ways do drugs affect learning?
- 1. impair the ability of the brain to store information (amnesia)--most common effect
- 2. Distort reality
- 3. (in rare cases) increase learning
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3 affects of drgus on the brain:
- 1. increased inhibition (limiting neuroplasticity)
- 2. reduced excitation
- 3. changes in biochemistry so that learning is impaired
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Agonist definition:
A drug that binds to a receptor of a cell and triggers a response by the cell. An agonist often mimics the action of a naturally occurring substance.
An agonist produces an action. It is the opposite of an antagonist which acts against and blocks an action.
Ex. Morphine mimics the actions of endorphins.
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Antagonist definition:
- acts against and blocks an action.
- For example, insulin lowers the level of glucose (sugar) in the blood, whereas another hormone called glucagon raises it; therefore, insulin and glucagon are antagonists.
- Ex. Alcohol blocks serotonin activity.
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the parts of the brain and their functions
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Main component of nervous system is
the neuron
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The neuron has four basic components:
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Neurons communicate with each other with:
neurotransmitters
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The brain is divided up into functional areas like:
(e.g., somatosensory and motor cortex)
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Cortical areas governed by:
regular organization and cortical amplification.
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