The nodal musculature of the heart has the capability to generate impulse:

1. on stimulation by the sympathetic division of the autonomic nervous system
2. on stimulation by the parasympathetic division of the autonomic nervous system
3. on stimulation by the somatic neural division of the peripheral nervous system
4. without any external stimulus
Subtopic:  Rhythmic Excitation of Human Heart: Part 1 | Rhythmic Excitation of Human Heart: Part 2 |
 77%
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Match each item in Column I with one in Column II and select the correct answer from the codes given:

Column I Column II
A. Closure of AV valves a. Second heart sound
B. Closure of semilunar valves b. First heart sound
C. Opening of AV valves c. Ventricular ejection
D. Opening of semilunar valves d. Passive ventricular filling

Codes

A B C D
1. a b c d
2. b a c d
3. b a d c
4. a b d c
Subtopic:  Rhythmic Excitation of Human Heart: Part 1 | Rhythmic Excitation of Human Heart: Part 2 |
 81%
From NCERT
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