AIIMS Zoology Neural Control And Coordination Class 11 Questions

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