Neural Control and Coordination - I (Class XI)

Dyslexia is the inability to read, write and spell words despite the ability to recognise letters.

Porifers have no neurons or nerve cells in their body.

Cavity of diencephalon is narrow and lined by ependyma and is called third ventricle.

It is the involuntary part of the peripheral nervous system.

Neurons are the structural and functional unit of human nervous system.

Antennary nerve rises from the supra-oesophageal ganglion in the nervous system of insects.

It is present in the grey matter of central nervous system.

In pseudounipolar neurons, cyton bears a single process which bifurcates to form an axon and a dendron.

In retina, bipolar neurons are present.

It gives rise to pons and cerebellum.

A wave of electrochemical disturbance that passes along the elements of nervous system during the conduction of an excitation is called nerve impulse.

A narrow intercellular space present between two neurons in the region of synapse is known as synaptic cleft.

Axons of neurons covered by non-nervous cells are called glia.

It is the moderately tough inner meninx, which is highly vascularised and pigmented covering of brain.

It differentiates into three parts: rhinencephalon, telencephalon and diencephalon.

It is the largest part of brain constituting nearly 80% of the brain.

It resists the movement of brain inside the cranium to prevent stretching and breaking of blood vessels.

It is the knob-like posterior part of the corpus callosum.

Corpora quadrigemina is a sub-part of mesencephalon.

It is the largest part of brain. It constitutes nearly 80% of the brain and functions as the central processing unit.