Question

What are the structures with which cockroach walks on smooth surfaces and on rough surfaces respectively? (U)

Answer 1

Cockroach have structure to move or locomote on both smooth and rough surfaces. For moving on smooth surfaces tarsomeres are having flashy pads on them known as plantulae which helps the cockroach to move or locomote over smooth surfaces by strong grip while to move on rough surfaces, claws and arolium are present that ease in locomotion over rough surfaces.

Answer 2

Answer:

Concept:

A definitive conclusion could not be drawn from earlier discoveries that cockroaches could exhibit a variety of leg coordination patterns, or gaits, since they were not followed by thorough behavioural or kinematic analyses. When cockroaches were exploring a huge arena, we evaluated their walking speeds and discovered that they tended to congregate at one of two favoured walking speeds: either extremely slowly (10 cm s-1) or quite quickly (30 cm s-1). By tying the animals and enabling them to walk in place on a lightly oiled glass plate, we experimentally decreased the mechanical connection among the various legs in order to highlight the brain control of walking limb motions.

Explanation:

• The legs of cockroaches are thin, spiky, and joined. They occur in three pairs, and each pair is affixed to a section of the roach's thorax, or "torso."
• The three sets of legs have various names because they have different functions. The prothoracic legs, which the cockroach utilises to slow itself down, are located just behind the head. The shortest are them.
• The insect may change its pace by accelerating or decelerating as necessary with the aid of its mesothoracic legs, which are located in the midsection.
• The roach moves forward at a rate of up to 50 body lengths per second because to its powerful metathoracic legs, which are located in the back.
• A cockroach walks with its centre leg moving to one side and its front and back legs moving to the other.
• It obtains remarkable mobility on even the most challenging terrain by alternately taking these steps.

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