AIIMS Zoology Neural Control and Coordination Class 11 Questions

Neurotransmitter released by

During conduction of nerve impulse

During rest, sodium pump of a nerve results in

Read the Assertion and Reason carefully to mark the correct option from those given below Assertion Arrival of an impulse at the axon terminal stimulates the release of neurotransmitters in synaptic cleft. Reason These neurotransmitters are responsible for the opening of ion channels.

Assertion: All motor neurons nerve impulses from the spinal cord to the brain. Reason: Motor neurons conduct nerve impulses from the spinal cord to the brain.

Na⁺/K⁺ pump is associated with

The release of chemical messenger from synaptic vesicles is under the influence of these ion(s).

Assertion : Myelin sheath insulates the nerve fibre and prevents its depolarisation. Reason : Nerve impulses are conducted more rapidly in non-myelinated nerve fibres than in myelinated ones.

If medulla oblongata is destroyed then which of the following functions will be effected?

Assertion: Connective tissue inside the brain is essential for conduction of nerve impulse. Reason: Connective tissue hold together the nerve cells of brain.

Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that

Hydra receives impulses and stimuli through

Assertion : The imbalance in the concentration of Na⁺, K⁺ and proteins generates the resting potential.

Reason : To maintain the unequal distribution of Na⁺ and K⁺, the neurons use electrical energy.

Assertion : Lateral line system is found in fishes and aquatic larval amphibians.

Reason : Lateral line system has receptors which are the clusters of sensory cells derived from ectoderm.

A person having Parkinson's disease shows defective action of which neurotransmitter in brain