BIO 2135 Lecture Notes - Lecture 11: Sensillum, Circulatory System, Chitin
2 Mar 2017
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Document Summary
Certain amount of cells, no more no less. Three circumoral rings with 6, 6, 4, sensilla in the rings. Protein matrix held together by simple ionic bonds. A protein matrix that is crosslinked is very strong. Gland cell sends stuff up to upper layer. Grow into a larger size suit of armor. Try to recover as much possible from original armour of chitin. Epithelial cells that used to be inactive, become active (apolysis) enlarged and make a gap between them and the other layer. Drink water to swell or swell with water. Also stretches the new endocuticle to make it bigger. Cannot change shape with muscle and hydrostatic system. Neuron under it, movement of setal hair with change the base part of the setal hair. Bent hair = knows it"s on the ground. Chemoreceptive is just the same but with a pore. Cannot develop a camera under water, uses a compound eye.
