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Physiology 1-7
| Question | Answer |
|---|---|
| Local potentials | a slight shift away from RMP in a specific region |
| Stimulus gated channels/Ligand gated channels | ion channels that open in response to chemicals produced by a sensory stimulus/chemical stimulus received from another neuron |
| Sodium potassium pump | active transport pumps 3 sodium out of the neuron and 2 potassium into the neuron |
| Why does the sodium potassium pump transport ions at an unequal rate of 3:2 | very little sodium reenters the cell via diffusion so this maintains an imbalance in the distribution of ions and maintains the resting potential |
| Nodes of Ranvier | gaps in the myelin sheath |
| 3 structures that make up a chemical synapse | a synaptic knob, a synaptic cleft, the plasma membrane of a postsynaptic neuron |
| Acetylcholine (ACh) | has an excitatory effect in skeletal muscles. inhibitory effect at neurouscular junctions of cardiac muscle tissue |
| GABA | gamma-aminobutyric acid, the most common inhibitory neurotransmitter in the brain |
| somatic nervous system | regulates the somatic effectors (skeletal muscles) |
| autonomic nervous system | efferent pathways carry information to autonomic effectors mainly smooth muscles, cardiac muscles, glands |