. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 176 SHIRAI, YOSHIMOTO, AND KANATANI TABLE II Tension retention and generation in isolated ovarian walls. Retained tension Small oscillation after Tension pulling Time lag generation Amplitude Exp. No. (mg) (min) (mg) (mg) Period (s) 1-MeAde application 1 10 0 ±1 80 2 20 0 ±1 96 3 11 0 ±0 irregular 4 25 0 ±2 40 5 10 0 ±0 irregular Mean ± 15 ± 3 ±1 72 ± 17 JF application 1 9 2 35* not detectable 2 18 2 28* not detectable 3 9 2 29 not detectable 4 22 2 27 not detectable 5 11 3 18 not detectable 6 10 2 21 not detectable Mea
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 176 SHIRAI, YOSHIMOTO, AND KANATANI TABLE II Tension retention and generation in isolated ovarian walls. Retained tension Small oscillation after Tension pulling Time lag generation Amplitude Exp. No. (mg) (min) (mg) (mg) Period (s) 1-MeAde application 1 10 0 ±1 80 2 20 0 ±1 96 3 11 0 ±0 irregular 4 25 0 ±2 40 5 10 0 ±0 irregular Mean ± 15 ± 3 ±1 72 ± 17 JF application 1 9 2 35* not detectable 2 18 2 28* not detectable 3 9 2 29 not detectable 4 22 2 27 not detectable 5 11 3 18 not detectable 6 10 2 21 not detectable Mean ± 13 ± 2 2 ± 26 ± 2 not detectable. * JF and 1-MeAde (10"5A/) added. the mass of oocytes lying on the external surface, and the length of the fragment shortened (Kanatani, 1967). However, as shown in Table I (retained tension after pulling), these ovarian walls did not retain the strong tension displayed just after they were pulled. Therefore, it is unlikely that ovarian walls are originally under strong tension. However, when the incised ovarian fragments were tested without pulling (no tension displayed before 1-MeAde application), they generated less tension after 1-MeAde application than did pulled fragments. Smooth muscle gen- erally displays a well-defined length-tension relationship: if the original length of. 20 Time (min) 50 FIGURE 3. Induction of tension generation in isolated ovarian walls prepared from intact ovarian fragments after "jelly fraction" (JF) application. JF, JF application; R, Retained tension; T, tension generated; , time lag; KC1, KC1 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Ra
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