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Human Circulatory System and Heart Physiology

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Multiple Choice

Which of the following statements regarding the innervation of the human heart is false?

  1. Afferent fibres carrying pain sensation run to the spinal cord.
  2. During rest, the vagal tone is recessive.
  3. Postganglionic fibres descend to the heart and form two plexuses.
  4. The effects of autonomic nervous system on coronary artery and blood flow are reciprocal.
  5. Preganglionic sympathetic fibres ascend from the upper five thoracic segments of the spinal cord.
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