Cardiac activity could be moderated by the autonomic nervous 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 stimulates heart rate but decreases stroke volume
4. The sympathetic system stimulates heart rate but decreases stroke volume
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The autonomic regulation of cardiac activity is carried out by a neural center located in:
1. | Medulla oblongata | 2. | Hypothalamus |
3. | Cerebrum | 4. | Thalamus |
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Sympathetic stimulation would lead to:
1. increased heart rate.
2. increased stroke volume.
3. vasoconstriction in visceral blood vessels.
4. all of the above.
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Normal activities of the human heart are regulated:
1. Intrinsically
2. By the autonomic nervous system
3. By the somatic neural system
4. By the adrenal medullary hormones
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I. | Sympathetic neural signals |
II. | Adrenal cortical hormones |
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I: | A | Cardiac centre in Medulla oblongata |
II: | B and C | Subdivisions of Autonomic Neural System having antagonist effects on heart |
III: | D | Catecholamines acting both as neurotransmitters and hormones |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |