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During the transmission of nerve impulse...

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

A

Biological

B

Physical

C

Chemical

D

Mechanical

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It is tempting to think that all possible transitions are permissible, and that an atomic spectrum arises from the transition of the electron from any initial orbital to any other orbital. However, this is not so, because a photon has an intrinsic spin angular momentum of sqrt2 (h)/(2pi) corresponding to S = 1 although it has no charge and no rest mass. On the other hand, an electron has got two types of angular momentum : Orbital angular momentum, L=sqrt(l(l+1))h/(2pi) and spin angular momentum, arising from orbital motion and spin motion of electron respectively. The change in angular momentum of the electron during any electronic transition must compensate for the angular momentum carries away by the photon. to satisfy this condition the difference between the azimuthal quantum numbers of the orbital within which transition takes place must differ by one. Thus, an electron in a d-orbital (1 = 2) cannot make a transition into an s = orbital (I = 0) because the photon cannot carry away enough angular momentum. An electron as is well known, possess four quantum numbers n, I, m and s. Out of these four I determines the magnitude of orbital angular momentum (mentioned above) while (2n m determines its z-components as m((h)/(2pi)) the permissible values of only integers right from -1 to + l. While those for I are also integers starting from 0 to (n − 1). The values of I denotes the sub shell. For I = 0, 1, 2, 3, 4,..... the sub-shells are denoted by the symbols s, p, d, f, g, .... respectively The orbital angular momentum of an electron in p-orbital makes an angle of 45^@ from Z-axis. Hence Z-component of orbital angular momentum of election is :

It is tempting to think that all possible transitions are permissible, and that an atomic spectrum arises from the transition of the electron from any initial orbital to any other orbital. However, this is not so, because a photon has an intrinsic spin angular momentum of sqrt2 (h)/(2pi) corresponding to S = 1 although it has no charge and no rest mass. On the other hand, an electron has got two types of angular momentum : Orbital angular momentum, L=sqrt(l(l+1))h/(2pi) and spin angular momentum, arising from orbital motion and spin motion of electron respectively. The change in angular momentum of the electron during any electronic transition must compensate for the angular momentum carries away by the photon. to satisfy this condition the difference between the azimuthal quantum numbers of the orbital within which transition takes place must differ by one. Thus, an electron in a d-orbital (1 = 2) cannot make a transition into an s = orbital (I = 0) because the photon cannot carry away enough angular momentum. An electron as is well known, possess four quantum numbers n, I, m and s. Out of these four I determines the magnitude of orbital angular momentum (mentioned above) while (2n m determines its z-components as m((h)/(2pi)) he permissible values of only integers right from -1 to + l. While those for I are also integers starting from 0 to (n − 1). The values of I denotes the sub shell. For I = 0, 1, 2, 3, 4,..... the sub-shells are denoted by the symbols s, p, d, f, g, .... respectively The maximum orbital angular momentum of an electron with n= 5 is

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NCERT TELUGU-COORDINATION-MEDICINE ORIENTED MATERIAL
  1. Extension of sympathetic nervous system is-

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  2. The axon of nerve cell in hand is shorter than the axon of nerve cell ...

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  3. During the transmission of nerve impulse through a nerve fibre, the po...

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  4. Is the structure of neuron suitable for transmission of impulses ? An...

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  5. The part of the brain that is responsible for hand eye coordination-

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  6. I am a part of brain. I am the site of mental abilities and memory. Wh...

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  7. Depolarization of nerve cell involves-

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  8. Are all functions of our body under direct control of the brain and sp...

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  9. What are jacobson's organs ? What is their function ?

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  10. Paralysis of both the lower limbs and not the upper limbs due to spina...

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  11. Which of the following cranial nerves of man is both sensory and motor...

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  12. The sympathetic nerves in mammals. arise from

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  13. What is the importance of reflex actions?

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  14. Mid brain contains-

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  15. Who transmits nerve impulse across the synapse ?

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  16. Fill in the blanks: Respiratory centre is situated in region of the ...

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  17. Which of the following is a neuro transmitter ?

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  18. The cells involved in sealing the minor damaged vascular openings are

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  19. Fill in the blanks: Sense of smell is perceived by lobe.

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  20. Fill in the blanks: Peristalsis of the intestine is the action of the...

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