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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?
'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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#3
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sorry op, I don't think this on our spec 
why dont you ask your teachers for help ☹☹
why dont you ask your teachers for help ☹☹
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#4
(Original post by Hellohsjakodsmka)
Oh god I have no idea
Oh god I have no idea
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sorry op, I don't think this on our spec why dont you ask your teachers for help ☹☹
why dont you ask your teachers for help ☹☹
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#5
(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?
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?
https://cnx.org/contents/[email protected]/Nervous-System
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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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