Abstract
ABSTRACTIt has been known for some time that the most rapid reflex contractions of sea-anemones show a characteristic relation to the stimulus. Thus in Calliactis parasitica a short series of adequate electric shocks, given at a frequency of about 1 per sec., is regularly followed by a facilitated contraction of the marginal sphincter (Pantin, 1935a, b). That is, each successive shock sets up a nervous impulse which facilitates the response of the muscle to the next; so that the contraction increases by steps corresponding to the shocks. The facilitating effect of each impulse decays so that as the frequency of stimulation is lowered the response becomes smaller and finally vanishes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
