Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    7
    ReputationRep:
    what is the function of sodium channel in terms of the absolute refractory period? Please help!!

    Also local anaesthetic reduces the number of action potentials what affect has the anaesthetic on membrane ion channels???
    • Study Helper
    Offline

    17
    ReputationRep:
    Study Helper
    (Original post by Katieh007)
    what is the function of sodium channel in terms of the absolute refractory period? Please help!!

    Also local anaesthetic reduces the number of action potentials what affect has the anaesthetic on membrane ion channels???
    Quite a weirdly worded question. The function of sodium channels are to allow or prevent sodium entry into a cell. During the refractory period of an action potential, sodium channels are shut to prevent any further stimulation of action potentials. During an absolute refractory period, any applied stimulus no matter the intensity fails to create an action potential.

    Local anaesthetics would block sodium channels, the main channels in creating action potentials. This would paralyse the cell. There are also anaesthetics which block the receptors on the postsynaptic terminal of a neuromuscular junction, also causing muscle paralysis.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.