In the central nervous system, myelinated fibres form the ….., while the non-myelinated fibre cells form the ……

• Grey matter, white matter

• White matter, grey matter

• Ependymal cells, neurosecretory cells

• Neurosecretory cell, ependymal cells

Lens of eyes is derived from

• Ectoderm

• Mesoderm

• Endoderm

• Both (b) and (c)

Schneiderian and tympanic membrane respectively belongs to

• Ear and nose

• Ear and eye

• Ear and ear

• Nose and ear

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?

• First negative then positive and again back to negative

• First positive than negative and continue to be negative

• First negative then positive and continue to be positive

• First positive then negative and again back to positive

Parkinsonism is related with

• Brain

• Spinal Nerve

• Cranial Nerves

• All of these

If the threshold for hearing increasing 1000 times, the hearing loss is

• 40 decibels

• 50 decibels

•  60 decibels

• None of these

197.

Sympathetic nervous system induces

• Heartbeat

• Secretion of digestive juice

• Secretion of saliva

• All of the above

Which cranial nerve has the highest number of branches?

• Facial nerve

• Trigeminal

• Vagus nerve

• None of these

The junction between the axon of one neuron and the dendrite of the next is called

• Junction point

• A synapse

• A joint

• Constant bridge

Vetebrate brain differentiates from

• Endoderm

• Mesoderm

• Ectoderm

• Blastoderm