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SA node acts as a pacemaker of the heart...

SA node acts as a pacemaker of the heart because of the fact that it

A

Is capable of generating impulses spontaneously at irregular rate

B

Has rich sympathetic innervations

C

Generates impulses with greatest rhythmicity

D

Is located in right atrium

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Assertion : The AV node is also called as the pacemaker of the heart. Reasoning : It is because of the fact that the AV node determines the rate of heartbeat.

Why is the S-A node called pace-maker of the heart ?

AAKASH INSTITUTE-TEST 5-EXAMPLE
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  3. Which of the given sets of elements is present in plant tissue in exce...

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  5. Select the mismatched pair

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  6. Identify the element on the basis of given statements a. Its deficency...

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  7. Chosse the odd one w.r.t the elements which help in maintainig cation-...

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  8. Toxicicity of manganese in aplant result in a. Brown spot surrounded b...

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  9. Movement of ions into synplast area of a plant cell

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  10. 2NH3 + 3O2 2NO2- + 2H+ + 2H2O The organism responsible for th...

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  11. Enzyme nitrogenese will be absent in

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  12. The region of nodule here Rhizobium is active, lacks

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  13. Read the following statements and mark them as True (T) or False (F) ...

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  14. A + NH4+ B C Glatamate + H2O + D complete the above conver...

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