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Taking the exaple of heart beat, justify...

Taking the exaple of heart beat, justify the antagonistic action of the sympathetic and the parasympathetic nerves.

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Sympathetic system increases contraction and reythm and parasympathetic system decreases contraction and rhythm with respect to heart beat.
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____ accelerates heart due to stimulation of adrenal medulla by sympathetic nerves

Go through the following statements (i) Vagus nerve decreases the rate of impulse formation from the SA node and its conduction (ii) As the human heart is myogenic in nature, the rate of formation and conduction of cariac impulse cannot be changed by the action of nerves (iii) The end of T-wave in ECG marks the end of systole. (iv) If the P-wave in ECG is inverted , it indicates that SA node fails to initiate impulse and the atrial muscle depolarises by the impulse originating in A.V. node. Whic of these are correct ?

[A] : In vertebrates, motor fibres to striped muscle. parasympathetic fibres to smooth muscle. and preganglionic sympathetic ii- bres are cholinergic. [R]: Cholinergic designates the type of nerve fibre that releases acetylcholine from its ending when stimulated by a nerve impulse.

If vagus/parasympathetic nerve of heart is cut, the heart beat will

OSWAAL PUBLICATION-CONTROL AND CO-ORDINATION-TOPIC - 2 Control and co-ordination in Animals (Short Answer Type Question-1)
  1. Write the main functions of the following : Sensory neuron

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  2. Write the main functions of the following : Cranium

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  3. Write the main functions of the following : Vertebral column

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  4. Write the main functions of the following : Motor neuron.

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  5. Write the name and functions of any two parts of the hind -0 brain.

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  6. Name the hormone resopnsible for the regulation of metabolism of carbo...

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  7. Name the hormone resopnsible for the regulation of balance of calcium ...

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  8. Name the hormone resopnsible for the regulation of blood pressure.

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  9. Name the hormone resopnsible for the regulation of water and electroly...

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  10. Name the hormones responsible for : development of moustache and beard...

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  11. Name the hormones responsible for : controlling the uterus changes in ...

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  12. Name the hormones responsible for : increasing blood glucose level.

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  13. Name the hormone resopnsible for the regulation of water and electroly...

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  14. What is the role of brain in reflex action ?

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  15. How does our body maintain blood sugar level ?

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  16. What happens at the synpse between two neurons ?

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  17. Taking the exaple of heart beat, justify the antagonistic action of th...

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  18. During exercise, the breathing rate is automatically enhanced. What is...

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