Term
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Definition
| Neuron That brings impulse to synapsis |
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Term
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Definition
| Stores nuerotransmitter in synaptic knobs |
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Term
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Definition
| When impulses jump from node to node on myelinated axons, speeding up the transmission |
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Term
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Definition
| What ion is required to close Na+ channels? |
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Term
Anesthetics
Ex. Procaine, Novacaine |
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Definition
| These decrease membrane premeability to Na+ on touch and pain neurons |
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Term
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Definition
| Which nerves are the fastest? |
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Term
| Inhibitory Neurotrannsmitters |
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Definition
| Neurotransmitters that increase permeability to K+ outside neuron |
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Term
| Excitatory Neurotransmitters |
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Definition
| Meurotransmitters that bind to receptors that open NA+ channels |
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Term
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Definition
| The initial part of the axon where summation of all the stimuli is "summed up" together to determine if threshold is reached. |
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Term
| 1. Action potential along axon causes axon to be more permeable to Ca+ and Ca rushes into axon. 2. Ca+ causes synaptic vessicles to migrate to end of knob 3. Vessicles dump neurotransmitter into the cleft. |
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Definition
| What are the steps leading to neurotransmitter release? |
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Term
| Enzymes destroy neurotransmitter or reuptake of neurotransmitters into vessicles |
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Definition
| How is the neurotransmitter's effect on the postsynaptic membrane stopped? |
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Term
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Definition
| When neurotransmitters are removed from the synamptic cleft and put back in |
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Term
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Definition
| Name two natural pain killers made by the body. |
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Term
| Acetylcholine, Epinephrine, glutamate, Histamine |
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Definition
| Name 3 excitatory neurotransmitters |
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Term
| Dopamine, GABA, Serotonin |
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Definition
| Name 3 inhibitory neurotransmitters |
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Term
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Definition
| What's the neurotransmitter that excites skeletal muscles? |
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Term
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Definition
| What disease is caused by a dopamine deficiency? |
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Term
1. block binding site for neurotransmitter
2. block reuptake of neuro.
3. block synthesis or release of neurotrans. |
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Definition
| List several ways that conduction across a synapse can be interrupted |
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Term
| The inside is negatively charge compared to the outside. The charge difference is -70 mv |
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Definition
| Describe a resting neuron. |
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Term
| Na+ otuside cell membrane; K+ and Cl- are inside cell membrane |
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Definition
| Where are Na+, K+ and Cl- ions in most numerous in the neuron? |
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Term
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Definition
| What's the minimum stimulus needed to reach an action potential? |
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Term
| Neurons are excitable. That means the dendrites become more permeable to Na+ |
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Definition
| How is threshold reached? |
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Term
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Definition
| What maintains a polarized membrane at a resting neuron? |
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Term
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Definition
| What is a membrane called that is more negative than the resting potential? |
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Term
| An action potential begins |
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Definition
| What happens when threshold is reached? |
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Term
| Depolarization and Repolarization |
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Definition
| What are the two events in an action potential? |
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Term
| Na+ rushing into the cell membrane |
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Definition
| What depolarizes the neuron? |
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Term
| K+ rushing out of the cell membrane |
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Definition
| What repolarizes the cell membrane? |
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Term
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Definition
| What is a wave of action potential called? |
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Term
| If threshold is reached an impulse will travel down the entire axon and all impulses are of the same strength. |
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Definition
| What is the all or none response? |
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Term
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Definition
| the brief time after a nerve impulse where another impulse won't be able to start. |
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Term
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Definition
| A greater intensity stimulus produces _____ impulses/ second |
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