Complete exam

1. This is an example of bottom-up sensation given that it is driven by data where perceptions begin with a stimulus. The stimulus is the green substance.
2. Neuroimaging helps in inking the various neural activities to certain cognitive processes inside the human brain and therefore, employ some given patterns of the neural activity which facilitate perception and sensation.
3. When someone looks at an object, the reflected light’s wavelength determines the color they see. The person’s brain responds to the stimuli produced when the light reacts with various cone cells in the eye. The waves hit the at the back of the eye where retina that has the cones is located and which allow one to recognize the color.
4. The cone cells in the retina for developing individuals have high tolerance for light variations which means that they can withstand since they are still young and light sensitive.
5. The striate cortex neurons blur the images by eliminating component gratings which have spatial frequencies that are high and also allow the high-pass filters to eliminate component gratings that have spatial frequencies that are low.
6. The study on lesson is an important method of finding out the correlation that exists between a certain area of the brain and a human behavior.

Part iii

1. Majority of neurons communicate with one another by discharging one of the many various kinds of neurotransmitters. Every neurotransmitter is fixed to its receptor on the adjacent neuron surface. Nerve impulses from the neurons are transmitted on to other neurons at synapses. The impulses can be transmitted directly at the electrical synapses or across the gap by neurotransmitters in absence of a physical link.
2. Selective adaptation is used in the identification of the mechanisms that underlie a visual processing. It is used to isolate the mechanisms which underlie the processing of color vision. This involves measuring detection threshold for foveal contrast for a broad range of temporal and spatial conditions. It also involves a spatial frequency which measures how fast a stimulus changes across a given space. Selective adaptation helps in understanding the processes in which a visual system changes in operating properties as a response to variation in an environment.
3. The structuralism theory holds that there perceptions originate from pure sensation but Gestalt theory maintains that perceptions do not correspond to pure sensation. The later theory rather holds that perception and recognition of n object is basically a problem in the processing of information. The theories, however, agree that recognition happens very fast and accurately and thereby allowing the observers to have a successful interaction with objects in a given environment.