hi marina this is mon bassal.. yer i misinterpreted that insect question wrote up an experiment instead.. receptors like 2 examples are mechanoreceptor for hearing and photoreceptor for sight.. dont worry marina pretty upset myself.. rubena ma-aki for the rest of ur exams..
Re: how did you go?
its sieve plate and companion cell.. im screwd for that 6 marker in communication gathering secondary sources and first hand information on that stupid tympanic membrane.. what did u guys do?
basically the threshold of reaction is the point of excitation that causes the neuron to fire... now when the neuron fires it is known as the 'all or none' response when the reaction either occurs at maximum or not at all.. the action potential only occurs if the stimulus causes enough sodium...