Name the two systems which help in the control and co-ordination of metabolic activities.

Write any one difference between them.

For minor surgeries in the body, doctors administer local anaesthesia to a part of the body so that the pain will not be felt by the patient. At which part, do you think, the nerve impulse is being arrested due to the effect of anaesthesia?

Assertion (A): All spinal nerves are mixed nerves.

Reason (R): Each spinal nerve has a sensory root and a motor root.

Differentiate medullated neurons from non-medullated neurons. Where are they found in the nervous system?

Name the part of the brain which regulates heart beat and respiration. Where is it located in the brain?