. Bulletin. Science; Natural history; Natural history. 114 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. ft?!;o:;^awM^^AA^ 36 54 SECONDS 36 54 SECONDS Fig. 4. appearini The effect of K+ on ciliary activity: A-D represent samples specified by the same letters ; in Fig. 3. The gills were perfused with 30 mM K+ (OâO), 80 mM K+ (AâA), 120 mM K+ 160 mM K+ (â¦ââ¦) and 400 mM K+ (â ââ ). five and nine (Fig. 4A-D. respectively). The cilioexcitatory effect of increasing amounts of K decreased with time. There was also a gradual increase in the lag period produced by K"^. A dosage of 400 mM K"^ whi
. Bulletin. Science; Natural history; Natural history. 114 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. ft?!;o:;^awM^^AA^ 36 54 SECONDS 36 54 SECONDS Fig. 4. appearini The effect of K+ on ciliary activity: A-D represent samples specified by the same letters ; in Fig. 3. The gills were perfused with 30 mM K+ (OâO), 80 mM K+ (AâA), 120 mM K+ 160 mM K+ (â¦ââ¦) and 400 mM K+ (â ââ ). five and nine (Fig. 4A-D. respectively). The cilioexcitatory effect of increasing amounts of K decreased with time. There was also a gradual increase in the lag period produced by K"^. A dosage of 400 mM K"^ which was previously maxi- mally cilioexcitatory was virtually ineffectual at the end of the time period. Discussion The above experiments show that increasing amounts of K+ in the perfusate enhance the average rate of beating of lateral cilia. A momentary lag period of 3 s is first observed before cilioexcitation is initiated. The lag effect of K+ supports the view that the response is related to the excitable properties of the lateral Fig. 3. Relative measurement of 5-HT yellow fluorophore in normal (â ââ ) and PCPA (10~'M) treated (â¢ââ¢) specimens. Letters indicate times at which specimens were removed for stroboscopic Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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