iPad 7:15 PM * 53% 4:04 Exit 09/28/18 - Lecture 23 3 What ion enters the posystn
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iPad 7:15 PM * 53% 4:04 Exit 09/28/18 - Lecture 23 3 What ion enters the posystnaptic cell, when a neurotransmitter binds to the ligand-gated receptor on the postsynaptic membrane? Ca2+ CI- K+ Na+ 4 Match the information on the left with the term on the right Location of the conductile region of a sensory neuron Select Answer Vagus Stuff Select Answer Number of action potentials per second Select Answer Site where neurons communicate with each other Select Answer Where the neuron innervates the muscle fiber Select Answer Location of the output region of a sensory neuron Select Answer Cancel Done Nicotine PNS Neuromuscular junction CNS Synapse Frequency codingExplanation / Answer
1. Action potential follow 'all or none' rule. This means that any value of EPSP above a minimum value will produce same action potential i.e the amplitude remains the same.The duration of the action potential is also fixed.
So, the variation in signal is identified on the basis of frequency of signal.
2. FALSE. An adequent amount of positive charge (i.e EPSP) is required to reach the trigger zone in order to develop action potential.
3.Na+ ion enters the postsynaptic membrane when a neurotransmitter binds to the receptors. This movement of Na+ ion leads to little reduction of membrane potential, this charge moves to the trigger zone and if adequent, will develop action potential.
4. Incomplete information.
5. The neurons in the dorsal root are sensory neurons. They get their signals from periphery and transfer it to the brain or spinal cord for processing. So, the input region of these neurons lie in the peripheral nervous system.
The ventral horn contains motor neurons, so input region can't be here.
In the grey matter of the spinal cord, synapses are formed between the sensory and motor neurons.
Dorsal root ganglion consist of cell bodies.
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