Consider the following four statements regarding the nervous system of a cockroach and choose the correct option indicating as true (T) or false (F) respectively.
1. The Brain of a cockroach is primitive and is made of 2 supra-oesophageal and 1 sub-oesophageal ganglia, connected by 2 circum-oesophageal connectives.
2. It has 3 thoracic and 6 abdominal, segmental ganglia.
3. All the Sensory organs are under the control of the brain directly.
4. Receptors are of tactile, chemo and photo sensory in nature
Consider the following four statements regarding the nervous system of a cockroach and choose the correct option indicating as true (T) or false (F) respectively.
1. The Brain of a cockroach is primitive and is made of 2 supra-oesophageal and 1 sub-oesophageal ganglia, connected by 2 circum-oesophageal connectives.
2. It has 3 thoracic and 6 abdominal, segmental ganglia.
3. All the Sensory organs are under the control of the brain directly.
4. Receptors are of tactile, chemo and photo sensory in nature
The correct option is C 1. T 2. T. 3. F 4. T
Statement 3 is false as the sensory organs and their reception is under the control of segmental ganglia instead of the brain directly. This forms part of the reason for the survival of cockroach for several days even with its head severed.
1. T 2. T. 3. F 4. T
Statement 3 is false as the sensory organs and their reception is under the control of segmental ganglia instead of the brain directly. This forms part of the reason for the survival of cockroach for several days even with its head severed.
