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A nerve impulse will travel through a ne...

A nerve impulse will travel through a nerve fibre only if its membrane suddenly becomes more permeable to ions of

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`K^(+)` ions
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During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge ?

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge ?

Complete the following paragraph by selecting the option that gives correct sequence of words. When a stimulus is applied at a site on the polarised membrane, the membrane at that site becomes freely permeable to (i) ions.It causes rapid influx of (ii) leading to (iii) of the membrane.

How do nerve impulses on a neuron travel only in one direction?

Impulses travel much more rapidly along myelinated nerve

Read the given statements and select the correct ones. (i)Autonomic neural system transmits impulses from the CNS to the voluntary organs and striated muscles of the body. (ii)Unmyelinated nerve fibres do not have Schwann cells which form the myelin sheath. (iii)Axonal membrane of a neuron while not conducting any impulse is comparatively more permeable to potassium ions (K^+) than to sodium ions (Na^+) (iv)A synapse is formed by the membranes of presynaptic neuron and a post synaptic neuron.

A parabolic pulse given by equation y ("in cm") = 0.3 - 0.1(x-5t)^(2) (y ge 0) travelling in a uniform string. The pulse passes through a boundary beyond which its velocity becomes 2.5 m//s . What will be the amplitude of pulse in this medium after transmission ?

The impulse in a myelinated nerve fibres jump from one …………….to another.

ICSE-NEURAL CONTROL AND COORDINATION-(Review question) Very short answer
  1. Name the non-nervous special cells present in inter nervous space

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  2. What is the function of Oligodendrocytes ?

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  3. A nerve impulse will travel through a nerve fibre only if its membrane...

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  4. What is the name given to the nerve impulse that jumps from one node t...

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  5. Name given to the intercellular space present between two neurons.

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  6. Name the 3 layers of eye

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  7. The transparent front part of sclera through which light passes

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  8. The layer in eye that contain photoreceptor cells.

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  9. Which fluid supplies nutriftion to lens and cornea ?

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  10. Which muscles bring abort the change in the thickness of the lens in t...

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  11. Which cells become active in dim light in eye helps to see in dark ?

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  12. Name the part of inner ear that has auditory receptors.

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  13. What is the role of three semicircular canals in ear ?

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  14. Name tube that connects the middle ear to the pharynx.

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  15. What is the shape of malleus ?

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  16. Bipolar nerve cells are present in

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  17. What type of equilibrium do maculae maintain ?

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  18. In which space is present the cerepbrospinal fluid ?

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  19. Name the fluid present within the cochlear anal.

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  20. Name the palce of retina which has the brightest vision ?

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