Sensory Recepters

A mechanoreceptor in the papillary layer of the dermis that responds to fine touch is a

1. Differentiate between sensation and perception. Explain the importance of separating these concepts. The differences between sensation and perception is that sensation is the elementary elements that, according to structuralist, combine to create perception. Whereas, perception is the conscious sensory experience (Goldstein, 2014). This student has always looked at sensations as those things in a persons’s environment that one can see, hear, smell, touch, taste, and feel. On the other hand perception is how a person’s brain will interpret what is seen, heard, smelt, felt, or touched.

The term sensation is used when referencing the process of sensing the environment through taste, touch, sound, smell, and sight (Goldstein, 2014). Moreover, it is the process that occurs once the sensory receptor experiences stimulation, which in turn produces nerve impulses that are sent to the brain to be processed in its raw form, then perception comes into play (Goldstein, 2014). Perception is used to describe the way people interpret these sensations and tries to make sense of everything around them on a daily basis. Perception is the occurrences of the brain

A) What is the blind spot? B) Discussion two reasons why we are not usually aware of the blind spot.A Blind spot is a blockage of vision from lack of perception. The lack of perception is due to the lack of Photoreceptors on the optic disk

Also, on the retina is the optic disk. There are no photoreceptors in this area, so any light that falls on this part of the retina is unseen and creates what is called the blind spot. (Hugh

Humans have blind spots because of the optic nerve information that is sent to the brain from the retina is through the optic nerve. Well the nerve has to have a way to exit the eye, that exit is where the blind spot is.

Humans have three cone cells that are extremely sensitive to Red, (620-700nm), Green (490-570nm) and Blue (450-495nm) wavelengths of light. Although these three cones are most sensitive to these wavelengths, they are still sensitive to the remaining wavelengths of visible light between 400-700nm. When a light with a wavelength of 600nm is transmitted through the retina, the Red and Green cones capture, sense and signal the brain that orange light is observed. In this case the Red and Green cones absorb light but the Green cones are less sensitive. Also, the Blue cones don’t absorb much light and are not sensitive

Sensation is when our senses receive and relay outside stimuli. Perception is how we interpret our sensations and put them into context.

The optic nerve reaches from behind the eyes to the occipital lobe where this visual information can finally be interpreted into what we know as ‘seeing something’. It is at this point that it is useful as this is when colours can be perceived (Breedlove, 2010).

The retina is the innermost layer of the eye. It is a thin, multiplex nerve tissue that lines the back of the eye. It is located between the vitreous humor and choroid. The retina is composed of ten cell layers. It contains rods and cones which are photoreceptors. The macula is the central area for detailed vision. Rods function in dim light and cannot detect color. Rods are the first to detect movement. There are approximately 126 million rods in each eye. Rods are more concentrated in the center of the retina. Cones provide detailed vision and work in bright light for the best performance. They provide color vision. Cones are concentrated at the center of the retina (Fekrat, 2005,

Pain is something that connects all of us. From birth to death we can identify with each other the idea and arguably the perception of it. We all know we experience it, but what is more important is how we all perceive it. It is known that there are people out there with a ‘high’ pain tolerance and there are also ones out there with a ‘low’ pain tolerance, but what is different between them? We also know that pain is an objective response to certain stimuli, there are neurons that sense and feel pain and there are nerve impulses that send these “painful” messages to the brain. What we don’t know is where the pain

The eyelids are made up of four layers, the skin, muscle, connective tissue and conjunctiva. The process of vision occurs when light waves from an object, enter through the iris. Light then passes through the lens of the eye, a double convex structure that is used to focus the light, and then reaches the retina. Inside the retina are rods and cones. Rods are used to sense light and dark, and cones are used for sensing colors. Whether the light entering the eye hits the cones or rods, a signal is sent across the optic nerve to the brain where it is processed and viewed as an image. Some issues people have with eyesight are as follows. Those who are farsighted are unable to see things clearly at a short distance, compared to a long distance. This occurs when the light that enters the eye is focused behind the retina, and not directly onto it. When the cornea is not curved enough, this happens. Nearsightedness is when one can see objects clear at a short distance, but not at a longer distance, and this is often caused by a change in the cornea. A Blind spot is the location the optic disk, where the optic nerve fiber exits, and at this location there are no cones or rods, so there is a blind spot.