Question

1N - Part 1

In a functioning human eye, light enters the human eye through the lense and reaches the retina. What does the retina interpret or record the light as and what type of message does it convert it into?

1N - Part 2

In regard to the above, where does the retina send the message it converts light into to, and through which nerve does it send it?

1N - Part 3

If a person’s eye is damaged in a way that obstructs light from reaching the retina, what impact can this have on their sight?

1N - Part 4

Briefly explain how the sense of sight contributes to a person’s sense of equilibrium?

1N - Part 5

What are the hair-like structures in the nasal cavity that contribute to the human sense of smell called?

1N - Part 6

In regard to the above, explain what these hair-like structures do when they sense odour in order to allow humans to have a sense of smell?

1N - Part 7

What other sense does human’s sense of smell enhance?

1N - Part 8

Which part of the ear is made up of the pinna and the external auditory canal?

1N - Part 9

Briefly explain the role/function of the pinna and the external auditory canal play in the human sense of hearing?

Answer 1

Part1 and 2

The retina acts like a film in the camera to create an image .when focused light strikes the retina,chemical reaction occurs within the specialized layers of cells.these chemical reactions cause electrical signal,which are transmitted through nerve cells into the optic nerve.which Carrie's these signal to the brain,where the electrical signals are converted into recognizable images.visual association areas of the brain further process the signals to make them understandable within correct context.

Part 3

Age related changes to the eye are the most the most common cause of eye floaters.the cornea and lens at the front of the eye focus light onto the retina at the back of the eye.as the light passes from the front of the eye to the back it passes through the vitreous humor a jelly like substance inside your eye ball.changes in these vitreous humor can lead to eye floaters.

Part4

The vestibular system inner ear balance mechanism works with visual system eyes and the muscle and parts of the brain that works together to let us see to stop blurring when the head moves.it also help us maintain awareness of positioning when,for example walking running or riding a vehicle

Part5 and 6

In the nose of human odours are detected by the patch of yellow tissue in the nasal cavity called the olfactory epitheilum.nerve cells are embedded in this tissue with fine hair like structures cilia protruding into the muscle lining of the nasal cavity