Cochlea of mammalian internal ear is concerned with

• hearing

• balance of body posture

• both (a) and (b)

• perception changes of atmospheric pressure

The part of an eye which acts like a diaphragm of a photographic camera is

• pupil

• iris

• lens

• cornea

The dendrite carries impulses

• towards the cyton

• away from cyton

• across the body

• from one neuron to another

Cerebrospinal fluid is present

• beneath the pia mater

• between piamater and arachnoid

• between arachnoid and duramater

• between duramater and cranium

Cranium is made up of

• 8 bones

• 12 bones

• 10 bones

• 16 bones

Arbor-vitae is composed of

• grey matter

• neurogleal cells

• white matter

• all of the the above

Human brain has greater development of

• cerebrum

• cerebellum

• optic lobes

• medulla oblongata

The 'end organs of Ruffini' are receptors of :

• heat

• cold

• pressure

• touch

259.

Which of the following part of human brain is associated with integration of sympathetic and parasympathetic activities ?

• Cerebrum

• Neopallium

• Hypothalamus

• Medulla oblongata

The unidirectional transmission of a nerve impulse through nerve fibre is due to :

• neurotransmitters are released by axon endings

• neurotransmitters which are released by dendrites

• nerve fibre which is insulated by a medullary sheath

• sodium pump which starts operating into the nerve fibre