339470
Cardiac activity could be moderated by the autonomous neural system. Tick the correct answer:
1 The parasympathetic system stimulates heart rate and stroke volume
2 The sympathetic system stimulates heart rate and stroke volume
3 The parasympathetic system decreases the heart rate but increase stroke volume
4 The sympathetic system decreases the heart rate but increase stroke volume
Explanation:
Sympathetic system plays excitatory role, while parasympathetic system plays inhibitory role thus stimulate the heart rate.
NCERT Exemplar
BIOXI18: BODY FLUIDS AND CIRCULATION
339471
How do parasympathetic neural signals affect the working of the heart?
1 Reduce both heart rate and cardiac output
2 Heart rate is increased without affecting the cardiac output
3 Both heart rate and cardiac output increase
4 Heart rate decreases but cardiac output increases
Explanation:
If the parasympathetic nervous system is stimulated it will increase the resting potential and decrease the rate of diastolic depolarisation. Thus, these circumstances will slow down the heart rate and the cardiac output also.
339470
Cardiac activity could be moderated by the autonomous neural system. Tick the correct answer:
1 The parasympathetic system stimulates heart rate and stroke volume
2 The sympathetic system stimulates heart rate and stroke volume
3 The parasympathetic system decreases the heart rate but increase stroke volume
4 The sympathetic system decreases the heart rate but increase stroke volume
Explanation:
Sympathetic system plays excitatory role, while parasympathetic system plays inhibitory role thus stimulate the heart rate.
NCERT Exemplar
BIOXI18: BODY FLUIDS AND CIRCULATION
339471
How do parasympathetic neural signals affect the working of the heart?
1 Reduce both heart rate and cardiac output
2 Heart rate is increased without affecting the cardiac output
3 Both heart rate and cardiac output increase
4 Heart rate decreases but cardiac output increases
Explanation:
If the parasympathetic nervous system is stimulated it will increase the resting potential and decrease the rate of diastolic depolarisation. Thus, these circumstances will slow down the heart rate and the cardiac output also.
