This all about the Eye 1. Where are receptor potentials generates in the retina

Question

This all about the Eye

1. Where are receptor potentials generates in the retina and where are action potentials generated?
2. Provide two functional differences between rods and cones.
3.Photo receptors turn light rays into chemical signals through light changing the shape of what type of protein in the outer segment of a photoreceptor?
4. Changing the shape of the answer to number “3” causes a functional change to a protein called transducin. What does transducin do?
5. Ultimately, the activation of transducin causes what type of channel to close in the outer segment, which causes the photoreceptor membrane to___________, which closes calcium channel in the inner segment, which ultimately stops the release of what signaling molecule?
6. When the signaling molecule in “5” is not released, what happens at a bipolar cell? This all about the Eye

1. Where are receptor potentials generates in the retina and where are action potentials generated?
2. Provide two functional differences between rods and cones.
3.Photo receptors turn light rays into chemical signals through light changing the shape of what type of protein in the outer segment of a photoreceptor?
4. Changing the shape of the answer to number “3” causes a functional change to a protein called transducin. What does transducin do?
5. Ultimately, the activation of transducin causes what type of channel to close in the outer segment, which causes the photoreceptor membrane to___________, which closes calcium channel in the inner segment, which ultimately stops the release of what signaling molecule?
6. When the signaling molecule in “5” is not released, what happens at a bipolar cell? This all about the Eye


2. Provide two functional differences between rods and cones.
3.Photo receptors turn light rays into chemical signals through light changing the shape of what type of protein in the outer segment of a photoreceptor?
4. Changing the shape of the answer to number “3” causes a functional change to a protein called transducin. What does transducin do?
5. Ultimately, the activation of transducin causes what type of channel to close in the outer segment, which causes the photoreceptor membrane to___________, which closes calcium channel in the inner segment, which ultimately stops the release of what signaling molecule?
6. When the signaling molecule in “5” is not released, what happens at a bipolar cell?

Explanation / Answer

Ans 1) The receptor potential in the eyes are generated in the rods and cones. It is also known as generator potential and is a transmembrane potential difference which starts due to the activation of the sensory receptor. The retina cells do not directly generate the action potential but it is the ganglion cells in front of the retina that does it.

Ans 2) Two functional difference between rods and cones:-

Ans 3) Rhodopsin – The protein is present as specialized light receptor on the roads. As the photoreceptor converts the light rays into chemical signals, there is a isomerization that takes place which changes the conformation of rhodopsin.

Ans 4) Transducin is a protein that is present in rods and cones cells of the retina and helps in the process of phototransduction. Visual phototransduction is a process by which light is converted to electrical signals in rod cells, cone cells and ganglion cells of eye. With the conformational change in rhodopsin, it leads to the activation of transducin.

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