Which part of the neuron triggers events that may cause stimulation or inhibition of adjacent neurons and other cells ?

(1) Nucleus

(2) Cell body

(3) Neuron’s endings

(4) Axon

Complete the following analogy :-

Vertebrates : Brain : : Cockroach : ___________

(1) Lower-oesophageal ganglion

(2) Supra-oesophageal ganglion

(3) Nephrocytes

(4) Ommatidia

Which among the following is not a sense organ of cockroach ?

(1) Labial palps

(2) Maxillary palps

(3) Caudal style

(4) Anal cerci

The nervous system of cockroach is made up of a series of ganglia which are joined by

Among the following organs which ones are not sense organs:

Antennae, maxillary palps, mandibular palps, labralpalps, labial palps and anal cerci

Which of the following statements is correct regarding Cockroach?  
1. Compound eye is also called as ocellus
2. Spiracle helps in excretion
3. Phallomere is present in female Cockroach
4. Ventral nerve cord

Mark the statement that is incorrect for central nervous system of cockroach

(1) In the head region, the brain is represented by Supraesophageal ganglia which supply nerves to antennae and compound eyes

(2) If the head of the cockroach is cut off, it will die immediately as the head holds a large part of the nervous system

(3) The sub oesophageal ganglion supplies nerves to labium, maxilla and mandibles

(4) Double ventral nerve cord of cockroach contains three thoracic and six abdominal ganglia

Consider the following statements A, B, C & D with certain blanks. Find the option which correctly fills up these blanks

A. The ootheca of cockroach is about __(i)____ long.

B. The development of P americana is  ___(ii)___, meaning there is development through ___(iii)____ stage.

C. In the head region of cockroach, the brain is represented by ___(iv)___ ganglion, which supplies nerves to antennae and ____(v)___.

D. The respiratory system of cockroach consists of a network of trachea, that opens through ____(vi)____ of small holes called spiracles present on the ____(vii)____ side of the body.

(1) A - (i) 3 mm

     B - (ii) Paurometabolous

           (iii) Nymphal

     C - (iv) Supra-oesophageal

           (v) compound eyes

(2) B-(ii) Paurometabolous

     C-(iv) Supra-oesophageal

         (v) wings

     D -(vi) 10 pairs

          (vii) Lateral

(3) A - (i) 8 mm

     C - (iv) Sub-oesophageal

            (v) Compound eyes

     D - (vi) 10 pairs

          (vii) Dorsal

(4) A - (i) 8 mm

     B - (ii) Paurometabolous

          (iii) Nymphal

C - (iv) Supra-oesophageal

           (v) compound eyes

     D - (vi) 10 pairs

           (vii) Lateral

If the head of the cockroach is removed, it may live for a few days because:

Choose the incorrect statement with respect to cockroach

1. Haemocoel contains haemolymph which contains colourless plasma and haemocytes

2. Nervous system consists of segmentally arranged ganglia, six in thorax and nine in abdomen

3. Mushroom gland is present in 6th – 7th abdominal segment in male cockroach

4. Proventriculus has an outer layer of thick circular muscles and inner thick cuticle forming teeth