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Provide an explanation for the occurrence of the afterimage based on events occurring in the cone cells
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- Extremely toxic substances such as carfentanil are rarely used in homicidal poisnings. Why?List two defects of neural tube closure.When Sperry and colleagues ablated the dorsal RGCs, the remaining ventral RGCs projected to the dorsal tectum. Conversely, when they ablated the ventral RGCs, the remaining dorsal RGCs projected to the ventral tectum.Ephrins and Ephs are distributed in dorsoventral gradients in both structures. EphB1 is expressed in the tectum, in a low-dorsal to high-ventral gradient. Ephrin-B1 and ephrin-B2 are expressed in the retina in a high-dorsal to low-ventral gradient. What do these expression patterns suggest about the mechanism used for dorsoventral patterning of RGCs projecting to the tectum?
- Long-term stress and sleep deprivation is associated with memory loss and negative thoughts.Subjects in a research study were shown images after they received either a full night’s rest or limited rest. The subjects were shown negative, positive, and neutral images. The subjects with limited rest remembered most of the negative images but only half of the positive and neutral images.The structures of the brain affected by long-term stress and sleep deprivation are, respectively: Select one: a. Long-Term Stress Sleep Deprivation Temporal lobe Frontal lobe b. Long-Term Stress Sleep Deprivation Temporal lobe Parietal lobe c. Long-Term Stress Sleep Deprivation Frontal lobe Occipital lobe d. Long-Term Stress Sleep Deprivation Frontal lobe Parietal lobeThe _____ amygdala contributes to sexual behavior in animals of all sexes. It appears to respond to sexually exciting stimuli, causing the release of dopamine in the _____ of the hypothalamus. A) medial; medial preoptic area B) dorsolateral; medial preoptic area C) dorsolateral; paraventricular nucleusDiscuss the early and late associative effects in the cellular processes of neurons that occur as a consequence of classical conditioning.
- Define neural pruning and explain why it happens in the adolescence brain.Mr. Emmanuel, an embryologist was enjoying a bowl of rice with goat light soup when he was rudely interrupted by a female anopheles mosquito which was also enjoying his sweet rich blood from his right leg. Perceiving the pain processed by the somatosensory cortex, he studied the mosquito's position and quickly laid hands on it resulting into its death. A. Describe how he perceived the pain from the mosquito bite. B.State in order how he voluntarily killed the mosquito. C. State the last five cranial nerve in order.Why does parfit believe that the split-brain cases support the bundle theory? Do you find his argument convincing? Why, or why not?
