. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHLORIDE CURRENT IN JELLYFISH NEURONS 657 Response Amplitude (mV) 90. Em(mV) Normal Low K* ph = L-30 B 0 -40 -80 50 ms FIGURE 3. (A) The effect of changes in the ionic composition of the saline on the reversal potential of the pH-induced depolarization. Each series is from a different cell. Note that changes in extracellular [Cl]0 alone affect the reversal potential. Variations in the slope of the lines merely reflect different stimulus positions. (B) A single pH-evoked depolarization recorded in low Cl saline. In this m
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHLORIDE CURRENT IN JELLYFISH NEURONS 657 Response Amplitude (mV) 90. Em(mV) Normal Low K* ph = L-30 B 0 -40 -80 50 ms FIGURE 3. (A) The effect of changes in the ionic composition of the saline on the reversal potential of the pH-induced depolarization. Each series is from a different cell. Note that changes in extracellular [Cl]0 alone affect the reversal potential. Variations in the slope of the lines merely reflect different stimulus positions. (B) A single pH-evoked depolarization recorded in low Cl saline. In this medium the depolarization evoked a significantly larger depolarization which typically produced a single action potential. The stimulus marker is given on the zero millivolt line (upper trace). Disulfonic acid (SITS) responses were reversibly abolished. The effect was use depen- dent; the first of a train of stimuli usually evoked small (<5 mV) depolarizations but subsequent stimuli produced progressively smaller responses. However, the nerve net invariable deteriorated very rapidly when bathed in SITS-containing saline. The neu- rons detached from the mesoglea and the axons appeared to become finer and retract. These structural changes put the usefulness of SITS as a blocking agent in doubt. Extracellular Cd++ (5 mM) was ineffective. DISCUSSION This study was designed to evaluate the mechanisms responsible for the depolar- ization produced by application of acidic saline to neurons from the jellyfish 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 Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Mar
Size: 1973px × 1266px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
