Communication Question! (1 Viewer)

[faisalabdul16]

Is this a correct definition for photoreceptor cells and what they do.

Photoreceptor cells are responsible for an animal's perception of vision. They are:
- located in the back of the retina
- a type of modified neuron/nerve cell
- contain light sensitive pigments

Light sensitive pigments absorb light which is converted into an electrochemical message, sent to the brain for interpretation. Electrochemical signal consists of a wave or stream of sodium and potassium ions which move across the cell membrane of the neuron.

There are two types of photo receptor cells in the retina:
Rods: are responsible for night vision and are found in the peripheral of the retina
Cones: are responsible for colour vision and fine detail. Mostly concentrated in the region of the retina called the fovea.

 

[mreditor16]

yes good job!

jokes, I don't even do bio

 

[Queenroot]

Wouldn't really talk about an action potential tbh. Like don't waste time defining what an electrochemical signal is. Just explain that the stimulus is light.

 

[faisalabdul16]

yes good job!
jokes, I don't even do bio

Thank you, mr bio state ranker

Wouldn't really talk about an action potential tbh. Like don't waste time defining what an electrochemical signal is. Just explain that the stimulus is light.

cooooooooooool, thanks ahah

 

[faisalabdul16]

Also, for the dot point "Outline the role of rhodopsin in rods," is it suffice to say:

The role of rhodopsin is to convert light absorbed within the eye into an electrochemical signal to be sent to the brain. Rhodopsin is a photosensitive pigment that absorbs light waves in the rods and is a broad-spectrum pigment found in vertebrates, arthropods and molluses. It consists of opsin and retinal, derivatives of Vitamin A. When rhodopsin absorbs light it changes shape and begins a series of chemical reactions. These reactions produce a generator potential that starts a nerve impulse. Following this sequence, more rhodopsin can be resynthesised using ATP

 

[Queenroot]

Also, for the dot point "Outline the role of rhodopsin in rods," is it suffice to say:

The role of rhodopsin is to convert light absorbed within the eye into an electrochemical signal to be sent to the brain. Rhodopsin is a photosensitive pigment that absorbs light waves in the rods and is a broad-spectrum pigment found in vertebrates, arthropods and molluses. It consists of opsin and retinal, derivatives of Vitamin A. When rhodopsin absorbs light it changes shape and begins a series of chemical reactions. These reactions produce a generator potential that starts a nerve impulse. Following this sequence, more rhodopsin can be resynthesised using ATP

Yep, that's a b6 answer.

 

[faisalabdul16]

Yep, that's a b6 answer.

are you trolling?

 

[Queenroot]

are you trolling?

no

 

[faisalabdul16]

no

haha my bad, thank you

 

[Queenroot]

Use scientific terminology. "Pinna, incus, malleus, stapes"

The rest is okay

 

[seventhroot]

Use scientific terminology. "Pinna, incus, malleus, stapes"

The rest is okay

gg no re fabibasabaulbabul we will remember

 

[faisalabdul16]

Use scientific terminology. "Pinna, incus, malleus, stapes"

The rest is okay

is the incus, malleus and stapes the tiny bones in the ear ossicles?

 

[Queenroot]

is the incus, malleus and stapes the tiny bones in the ear ossicles?

Yes

 

[faisalabdul16]

Yes

I've never heard of them being called that

Anvil hammer and stirrup

 

[Queenroot]

I've never heard of them being called that

Anvil hammer and stirrup

ok

 

[Rhinoz8142]

Is it me.. or its rarely u find questions about action potential in the past papers..
Since, we are on the topic about rhodspin, its only for rods right ?,

 

[Queenroot]

Is it me.. or its rarely u find questions about action potential in the past papers..
Since, we are on the topic about rhodspin, its only for rods right ?,

You usually mention it in one of the longer response questions. And yes it is.

 

[Rhinoz8142]

You usually mention it in one of the longer response questions. And yes it is.

Alrite, just double checking..

Thx !

 

[madharris]

I've never heard of them being called that

Anvil hammer and stirrup

In the end it doesn't really matter as it's hsc as long as you mention them if needed

Sent from my GT-I9300 using Tapatalk

 

[faisalabdul16]

Pedigree. Someone do this, need confirmation.


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