BIO 2135 Lecture 15: March 7, 2017 - Insect abdomen, Reproduction, Metamorphosis types, Bee communication
7 Mar 2017
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Document Summary
Very few insects use direct insemination they hand spermatophores, which opens once inside the female, and releases sperm. Oviduct leads from vagine to 2 ovaries. Female receives egg from male, stored in spermatheca of female. When egg passes in front of spermatheca, the sperm is released. Spermatheca nourishes and keeps the sperm alive specialized in some insects, like bees. They put the waterproof shell on the egg before it is fertilized there must be a tiny pore, opening for sperm to get in. Testis consist of series of repeating elements that all are producing sperm, at different stages. When they mate, they put the spermatophore into the female. They can respond very fast to evolutionary pressures. Potassium pumped into the lumen (center of the tube) Has a potassium pump in the membrane (single cell layered thick membrane) The potassium creates a positively charged environment in the lumen. Chlorine ions come in to neutralize the charge.
