The Nervous System of Cockroach

Q. In cockroaches, the double ventral nerve cord extends upto which segment?

1. Preanal segment
2. 10th abdominal segment
3. 7th abdominal segment
4. 5th abdominal segment

Q. How many of the given statements are true?

A) In a cockroach, the brain is represented by a supra-oesophageal ganglion that supplies nerves to the maxillary and labial palps.
B) The compound eyes are situated at the ventral surface of the head.
C) Each compound eye consists of 200 hexagonal ommatidia.

1. One
2. Two
3. Three
4. None of the above

Q. Match list I with list II and choose the correct option.

List I	List II
1. Gustatory receptors	A. Anal cerci
2. Olfactory receptors	B. Smell
3. Tactile receptors	C. Touch
4. Auditory receptors	D. Ommatidia
5. Mosaic vision	E. Taste

1. 1-C, 2-B, 3-E, 4-A, 5-D
   
2. 1-C, 2-D, 3-E, 4-B, 5-A
   
3. 1-E, 2-B, 3-C, 4-A, 5-D
   
4. 1-E, 2-D, 3-C, 4-B, 5-A
   

Q. Which of the following characteristics of the double ventral nerve cord holds true in case of Periplaneta americana?

1. Nerve cord is double
   
2. Extends throughout of the body
   
3. Ganglia are segmented
   
4. All of the above