What is the function of a chordotonal organ?
What is the function of a chordotonal organ?
Chordotonal organs are structurally complex Type I mechanoreceptors that are distributed throughout the insect body and function to detect a wide range of mechanical stimuli, from gross motor movements to air-borne sounds.
What is the structure of the chordotonal organ?
Chordotonal organs are stretch receptor organs found only in insects and crustaceans. They are located at most joints and are made up of clusters of scolopidia that either directly or indirectly connect two joints and sense their movements relative to one another.
What is true about Scolopedia in insects?
A scolopidium (historically, scolopophore) is the fundamental unit of a mechanoreceptor organ in insects. It is a composition of three cells: a scolopale cap cell which caps the scolopale cell, and a bipolar sensory nerve cell.
What is tympanum in insects?
A tympanal organ (or tympanic organ) is a hearing organ in insects, consisting of a membrane (tympanum) stretched across a frame backed by an air sac and associated sensory neurons. Sounds vibrate the membrane, and the vibrations are sensed by a chordotonal organ. Hymenoptera (bees, wasps, ants, etc.)
Which is a Specialised organ found in a cockroach?
Malpighian tubules constitute the excretory organs of cockroach and other insects.
What type of antennae do cockroaches have?
Filiform antennae The antenna tapers gradually from the base to the tip e.g. Bristletails, Cockroaches, Mayflies, Stoneflies and Caddisflies. Moniliform – The round segments make the antenna look like a string of beads e.g. Beetles.
What is the function of the Campaniform Sensilla in insects?
Campaniform sensilla are a class of mechanoreceptors found in insects, which respond to local stress and strain within the animal’s cuticle. Campaniform sensilla function as proprioceptors that detect mechanical load as resistance to muscle contraction, similar to mammalian Golgi tendon organs.
What is an insects sensory organ called?
Chordotonal organ: The specialized sensory organs that receive vibrations are subcuticular mechano receptors called chordotonal organ. Johnston’s organ: All adults insects and many larvae have a complex chordotonal organ called Johnston’s organ lying within the second antennal segment (Pedicel).
What is the function of the cuticle in terrestrial insects?
The cuticle or exoskeleton is a protective integument over the external surface of insects. It is an extracellular matrix produced by the epidermis and consists mainly of proteins and the polysaccharide chitin (Tajiri, 2017). In addition to a physical barrier, the cuticle also provides an active biochemical barrier.
What is the tympanum for?
In general, any animal that reacts to sounds or communicates by means of sound, needs to have an auditory mechanism. This typically consists of a membrane capable of vibration known as the tympanum, an air-filled chamber and sensory organs to detect the auditory stimuli.
Which one is the auditory organ of grasshopper?
auditory organs of orthopterans, the tympanic organs on each side of the abdomen, are found in both sexes of grasshoppers and on the front tibiae of most crickets and katydids.
What kind of organ is the chordotonal organ?
Chordotonal Organ. a sensory organ of insects and crustaceans. Chordotonal organs consist of groups of elongate scolopale chordotonal sensillae drawn between two areas of the cuticle or between the cuticle and adjacent tissues. Each sensillum consists of one to three bipolar neurons and two to three auxiliary cells,…
Where is the chordotonal organ located in an insect?
Chordotonal organs located in the tibias of insects react to vibrations of the surface on which the insect is located, for example, soil and plants. The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc.
Where is the chordotonal organ located in the femur?
The femoral chordotonal organ is located in the dorsal distal region of the femur, and articulates to the wall of the femur at one end where it detects changes in joint angle and muscle stretch. Lipovsek et al. (1999) also reported glial cell attachments in the scolopidia of the lacewing femoral chordotonal organ.
Where are sensory neurons located in the chordotonal organ?
Chordotonal organs contain type I sensory neurons. In insects, they are generally less directly connected to the exoskeleton than hairs or bristles. Instead, they are located below the cuticle, and detect relative movements of various body parts.