Answer to Question #190136 in Human Anatomy and Physiology for EASWARI

Question

with the help of examples describe the types of mechanoreceptors found in non chordates and explain their role in information processing

Answer 1

• There are types of mechanoreceptors found in non-chordates in the respective phylum are –

1. A tactile or touch receptor is a type of phasic receptor. In phylum cnidaria, these types of receptors named cnidocils are found in the cnidoblasts. The cnidocil when touched, cnidocyte contracts violently and throws the nematocyst out. Both capture and defense of prey are affected by this.
2. Proprioceptors are a kind of tonic receptor and cause stress modifications in the exoskeleton. The invertebrates, are responsible for the transmission of postural information and are found in insects and crustacea. In insects, they become modified cuticular structures in the form of hair.
3. Equilibrium receptors- maintaining body equilibrium is a prerequisite for normal body functioning. These receptors give a response to a loss of bal­ance. Lithocysts are a type of marginal sense organs that enables horizontal swimming in cnidarians. Statocysts are specialized structures of balance found in Arthropods and Molluscs.
4. Phono-receptors or sense of hearing- They can detect waves of pressure caused by mechanical instability. Example- chordotonal organs in arthropods.