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  • The relay station for the transmission of messages is Mid brain
  • Medulla oblongata is a reflex centre for respiration
  • The part of brain that is mainly associated with involuntary activities is Medulla Oblongata
  • The structure that controls reflex action is Spinal cord
  • The center of reflex action is spinal cord
  • Autonomic nervous system regulates all functions except learning and memory
  • An activity controlled by autonomic nervous system is Peristalsis of the intestine
  • The nerves carrying impulses to the central nervous system are known as Sensory nerves
  • The largest cranial nerve is Vague nerve
  • The two components of the autonomic nervous system which have opposing influence on the same organ are Sympathetic system and parasympathetic system
  • Sympathetic nervous system causes secretion of saliva
  • Parasympathetic nervous system causes decrease in heart beat
  • The transparent portion of the sclera is called Cornea
  • The jelly like fluid called Vitreous humor is filled in the eye ball between eye lens and retina
  • Aperture that controls the light entering into the eye is pupil
  • Cone cells are sensitive to colour and brightness
  • The external ear which is a cartilaginous organ is called Pinna
  • The part of ear that helps in balancing the body is semicircular canals
  • Eustachian tube helps to equalize the pressure on either side of the ear drum
  • The external ear is separated from middle ear by Tympanum
  • Olfactory nerve connects nose to the brain
  • Skin helps to perceive sensation of touch
  • An example for endocrine gland is Salivary gland
  • Deficiency of insulin causes increase in blood sugar