The velocity of conduction of nerve impulse in frog is

• 300 m/s

• same as of electricity

• faster than sound

• 30 m/s

Tree of life is

• arbor vitae

• pons Varolii

• organ of Corti

• diencephalon

Eustachian canal connects

• middle ear with external ear

• middle ear with internal ear

• external ear with internal ear

• pharynx with middle ear

54.

From outer to inside the sequence of three bones present in the middle ear of mammals is

• malleus, stapes and incus

• stapes, malleus and incus

• malleus, incus and stapes

• incus, malleus and stapes

The cavity of diencephalon is known as

• I ventricle

• II ventricle

• III ventricle

• iter

Aqueous and vitreous humour are divided by

• lens

• iris

• retina

• optic nerve

Autonomic nervous system affects

• reflex actions

• sensory organs

• internal organs

• None of these

In a man, abducens nerve is injured. Which one ofthe following functions will be affected?

• Movement of the eye ball

• Swallowing

• Movement of the tongue

• Movement of the neck

Neural canal is present in

•  humerus

•  tibia-fibula

• vertebral column

•  cranial bones

If dorsal nerve of spinal cord is broken down then its effect is

• no impulse is transmitted

• impulse is transmitted but slowly

• impulse is transmitted fast

• no effect on impulse