maniccrammer
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I'm doing past paper questions and am really confused by this one which is about the nervous system. It says:
'Sensory receptors in Hydra are located across the whole body surface and the organism responds relatively slowly to stimuli. In vertebrates, several sense organs are located in the head & they can respond quickly to many different stimuli with highly co-ordinated movements. Starfish have many sensory receptors on the underside of their arms & around the mouth.
Using the information given, suggest why starfish have more co-ordinated movements than Hydra but they only move slowly.'

Any ideas?
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Moonbow
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Hellohsjakodsmka might know 🙃
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Hellohsjakodsmka
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(Original post by Moonbow)
Hellohsjakodsmka might know 🙃
Oh god I have no idea :vroam:
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sorry op, I don't think this on our spec :console: why dont you ask your teachers for help ☹☹
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Moonbow
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(Original post by Hellohsjakodsmka)
Oh god I have no idea :vroam:
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sorry op, I don't think this on our spec :console: why dont you ask your teachers for help ☹☹
Oh sorry 🤣
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Kitten261002
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(Original post by maniccrammer)
I'm doing past paper questions and am really confused by this one which is about the nervous system. It says:
'Sensory receptors in Hydra are located across the whole body surface and the organism responds relatively slowly to stimuli. In vertebrates, several sense organs are located in the head & they can respond quickly to many different stimuli with highly co-ordinated movements. Starfish have many sensory receptors on the underside of their arms & around the mouth.
Using the information given, suggest why starfish have more co-ordinated movements than Hydra but they only move slowly.'

Any ideas?
Check this out:

https://cnx.org/contents/[email protected]/Nervous-System
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maniccrammer
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Thank you everyone, I ended up emailing my teacher who sent me the mark scheme and some notes, appreciate the help
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