There are types of neurons in the retina of the eye that first respond to visual stimuli (light). 3.

Pathway of light Optic disc Central artery- and vein of retina Photoreceptors Pathway of signal output Pathway of light (b) Cells of the neural layer of the retina (a) Posterior aspect of the eyeball Retina: Neural layer Pigmented layer Choroid Sclera Optic nerve 47 (c) Photomicrograph of retina Using the provided tissue section (or part c above), diagram the layers of the retina. Highlight the different layers, neurons, inner layer, outer layer, the pathway of light, and direction of signal output. 50 il cen 12 Bulb ister only.

Define Retinal Disparity- The difference between our 2 retinas.

Give exact location and function of optic nerve

15. IS THE LENS ANTERIOR OR POSTERIOR TO THE IRIS?    THIS IS NOT AND WILL NOT BE GRADED

#22 The three types of cones in the human eye are  a red, yellow, and green  b red, green, and blue  c red, blue, and cyan  d yellow, cyan, and magenta

3 questions 1.) Which of the following is NOT a property of the rod cells found in the retina? A.) A rod cell can detect a single photon of light. B.) They are concentrated mainly in the fovea centralis. C.) The rods detect motion and are responsible for peripheral vision . D.) There are about 125 million rods in the retina. 2.) Which of the following statements CORRECTLY describes the function of a component of a reflex arc? a.Sensory neurons gather information from effectors. b.Sensory receptors receive stimuli from interneurons. Question 3 is in the pic c.Motor neurons conduct impulses from interneurons to effectors. d.Effectors act as integration centres.

Protects and shapes the eyeball; provides a sturdy anchoring site for extrinsic eye muscles. Blood vessels that supply nutrition to most of the eyes' structures (excluding the lens and cornea). Contains only cones; provides detailed color vision. Lacks photoreceptors; where optic nerve exits the eye. Consists of a pigmented layer and a neural layer. [Choose ] [Choose ] [Choose ] [Choose] [Choose]

A cochlear implant can restore hearing in individuals with damages to the cochlea. There are four main parts to a cochlear implant: processor, electrode array, transmitter, and microphone. 1. a microphone picks up sound from the environment2. a speech processor selects and arranges sounds picked up by the microphone. 3. a transmitter and receiver/stimulator receive signals from the speech processor and convert them into electric impulses. 4.  the impulses from the stimulator are collected by an electrode array and sent to the auditory nerve. Which human ear structure is most similar in function to the electrode array? Explain.

Recall that the eye is composed of three layers or "tunics" — the fibrous, vascular, and nervous layers — which enclose two cavities that are separated from each other by the lens. Review the components of these three layers by matching each description with the appropriate letter in the figure below: 1. Fluid in the anterior portion of the eye that provides nutrients to the lens and cornea   2. The "whites" of the eye   3. Area of the retina that lacks photoreceptors   4. Contains smooth muscle that controls the shape of the lens   5. Nutritive (nourishing) layer of the eye   6. Layer containing rods and cones   7. Gel-like substance that helps support the eyeball                    8. Pigmented smooth muscles that control pupil size   9. Most anterior component of the fibrous layer — your "window to the world"   10. Structure that changes shape to bend light toward rods and cones