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Write 2 page essay on the topic Brain.By inhibiting the reticular activating system in the brain stem, the preoptic nucleus makes the cortex to sleep. Therefore, consciousness depends on normal workin
Write 2 page essay on the topic Brain.
By inhibiting the reticular activating system in the brain stem, the preoptic nucleus makes the cortex to sleep. Therefore, consciousness depends on normal working of the brain.
EPSPs occur on the cell bodies (of the neuron) as well as the dendrites. Excitatory postsynaptic potentials results from the activation of ions on the postsynaptic channel. The channel opens, giving way for the ions to move across the membrane, which causes depolarization
A drug interferes with the normal neurotransmission. Therefore, a drug alter how neurons communicate since it dopamine mediation of neurons is interfered with. A drug can affect the synapse by increasing the neurotransmitter in the synaptic space. This may result to an increase in the action potential, hence amplified behavior such as feeling of pleasure. Sometimes, drugs may interfere directly with the postsynaptic receptors.
While some drugs block, others activate the receptors. In this case, a drug can affect the brain by inhibiting the neuromodulator from binding with the required receptor, therefore blocking the part responsible of sleep from causing sedation. Drugs such as LSD blocks the dopamine transporter between serotonin receptors. thus resulting to change in moods and eating. Finally, a drug can interfere with the removal of neurotransmitters contained in the synapse. Such a drug blocks the dopamine transporter, which may result to euphoria due to accumulation of dopamine.
The retina acts as the interface to the brain by transforming light to electrical impulse. On the other hand, striate cortex receives translated information and converts it to actual perception of the environment.
To encode sound, the auditory system decomposes the amplitude signal that arrives at the ear into several bands of frequency with each frequency being approximately an algorithmic function of the length from the
