. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 464 V. G. DETHIER labellum. Accordingly, tests were made on the chemosensory hairs of these appendages. Small drops of either protein or M sucrose were applied to tarsal and labellar hairs of protein-hungry females and the presence or absence of proboscis extension noted. In each case care was taken first to satiate the fly with water and to test each hair first with water. About 40 different labellar and 20 different tarsal hairs were tested. The tests showed that some hairs were sensitive both to protein and to sugar;
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 464 V. G. DETHIER labellum. Accordingly, tests were made on the chemosensory hairs of these appendages. Small drops of either protein or M sucrose were applied to tarsal and labellar hairs of protein-hungry females and the presence or absence of proboscis extension noted. In each case care was taken first to satiate the fly with water and to test each hair first with water. About 40 different labellar and 20 different tarsal hairs were tested. The tests showed that some hairs were sensitive both to protein and to sugar; others, to sugar only. At this time no hairs were found which were sensitive to protein but insensitive to sugar. Preliminary electrophysiological findings are in accord with these behavioral results, but the matter requires more extensive investigation before the activity of ML •12. " •10 -- CO « -06 - Ss § -04- •02 — O — O O-l M SUCROSE • PROTEIN. 6 -I- -I- 8 1O Days — 16 18 20 FIGURE 8. Daily intake of .17 sucrose and brain-heart extract by a virgin female blowfly from which the ovaries have been removed. each of the several neurons in the hair is understood. One of the long (ca. 300 p) marginal labellar hairs tested was sensitive to water, fructose, XaCl, 1 train-heart extract, and crystalline hemoglobin. Activity was detected in three fibers (Fig. 10). One fiber, as Mellon and Evans (1961) have shown for these hairs, responded to water, one fiber to sugar, and one to sodium chloride. When sugar was applied, both the water fiber and the sugar fiber responded (Fig. 10B ). When 1 M sodium chloride was applied, the water fiber was suppressed and only the salt fiber re- sponded (Fig. 10D). When a mixture of fructose and sodium chloride was applied, three fibers (water, sugar, and salt) responded (Fig. 10G). When brain-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
