The iris works like a shutter in a camera. It has the ability to enlarge and shrink, depending on how much light is entering the eye. This clear, flexible structure works like the lens in a camera, shortening and lengthening its width in order to focus light rays properly. Light rays pass through a dense, transparent gel-like substance, called the vitreous that fills the globe of the eyeball and helps the eye hold its spherical shape.
Differentiate the processes of sensation and perception. Explain the basic principles of sensation and perception. Describe the function of each of our senses. Outline the anatomy of the sense organs and their projections to the nervous system.
Apply knowledge of sensation and perception to real world examples. Explain the consequences of multimodal perception. After passing through a vibrantly colored, pleasantly scented, temperate rainforest, I arrived at a cliff overlooking the Pacific Ocean.
I grabbed the cold metal railing near the edge and looked out at the sea. Below me, I could see a pod of sea lions swimming in the deep blue water. All around me I could smell the salt from the sea and the scent of wet, fallen leaves.
Our senses combine to create our perceptions of the world. It is probably best to start with one very important distinction that can often be confusing: The physical process during which our sensory organs—those involved with hearing and taste, for example—respond to external stimuli is called sensation.
Sensation happens when you eat noodles or feel the wind on your face or hear a car horn honking in the distance. During sensation, our sense organs are engaging in transductionthe conversion of one form of energy into another.
Physical energy such as light or a sound wave is converted into a form of energy the brain can understand: After our brain receives the electrical signals, we make sense of all this stimulation and begin to appreciate the complex world around us.
This psychological process—making sense of the stimuli—is called perception. It is during this process that you are able to identify a gas leak in your home or a song that reminds you of a specific afternoon spent with friends.
Regardless of whether we are talking about sight or taste or any of the individual senses, there are a number of basic principles that influence the way our sense organs work. The first of these influences is our ability to detect an external stimulus.
Each sense organ—our eyes or tongue, for instance—requires a minimal amount of stimulation in order to detect a stimulus.
The way we measure absolute thresholds is by using a method called signal detection.World War II Essay. World War II War is one of the most tragic things in our world today. It is even sadder that usually it comes around at least once in our lifetime. As with the eye in the last chapter, the ear teaches us about the relationship of believers and the Lord.
With the eye, we are to look toward God in faith. With the ear. Well over half of our cone cells respond to red light, around a third to green light, and just two per cent to blue light, giving us vision focused around the yellow-green region of the spectrum.
Our Ears and Eyes Deceive Us - We have eyes to see with, ears to hear with, why then do we err. We have been blessed with five senses that we are expected to survive with.
Optical illusions are classical examples of our senses misleading us. They trick our minds in several different ways. As "optical" implies, we are tricked through sight, or our eyes. Sep 11, · This tactic ― putting a Latino candidate on the ticket ― is a favorite and familiar tactic of Republicans to deceive voters on get the ears and eyes of a United States; Get breaking.