Neural control and coordination practice · Mixed difficulty

Skeletal muscles are controlled by

Maintenance of the ionic gradients across the resting membrane is done by the

The system that transmits impulse from the CNS to the involuntary organs and smooth muscles of the body

At the neuromuscular function

Connection between axon and dendrite is

Which statements are wrong?
I.Synaptic cleft of neurons secrete adrenaline.
II.Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon.
III.Non-myelinated nerve fibre is enclosed by a Schwann cell that does not form myelin sheath.
IV.Spinal cord and cranial nerves are made of non-myelinated nerve fibres.
Of the four statements,

Select the incorrect statement w.r.t. function of neurons

Read the following matches carefully.

I) Corpus callosum: Connects both right and left cerebellar hemispheres.

II) Limbic system: Regulation of sexual behaviour and emotions with the hypothalamus.

III) Association areas: Responsible for intersensory associations, memory and communication.

IV) Medulla oblongata: Controls motivation and urge for eating and drinking .

How many of the above matches is/are incorrect?

Select the odd one w.r.t brain stem.

Myelin sheath is derived from

Somatic neural system relays impulse from

Unipolar neurons can be seen in the

Co-ordination is considered as an important process in an animal body because ;

Which one is correct regarding the ear and hearing?

Vertebrate brain differentiates from

The system, responsible for providing an organized network of point to point connections for a quick coordination, is called

All of the following structures of internal ear are responsible for maintenance of balance of the body and posture except

What is incorrect about the resting state of neuron?

Which is characteristic of the sympathetic
division of the autonomic system?

Eustachian tube connects

Assertion: Reflex arc comprises of at least one afferent neuron, one efferent neuron and a part of PNS.

Reason: The afferent neuron receives signal from a sensory organ and transmits the impulse via a dorsal nerve root into the CNS.

A neuron is said to be in resting state when,
I. it is not conducting any impulse
II. plasma membrane is electrically positive outside and negative inside
III. the nerve fibre is stimulated mechanically or electrically
IV. plasma membrane is negative outside and positive inside
The correct option is

Which sense organ is related with maintenance of body position in response to rotational acceleration?

Synaptic knob possesses

What kind of neural organization can be seen in lower vertebrates?

Select the incorrect pair.

On the basis of nature of nerve fibres, the nerves are

Afferent nerve fibres carry impulses from

Which of the following statements are correct for iris?
I. The ciliary body extends forward to form iris
II. It is pigmented and opaque structure
III. It is the visible coloured portion of the eye
Choose the correct option

An action potential in the nerve fibre is produced when positive and negative charges on outside and the inside of the axon membrane are reversed because