Multiple choice

Regarding the innervation of the human heart, which among the following statements 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 effect of autonomic nervous system on coronary artery and blood flow is a reciprocal.

  5. Preganglionic sympathetic fibres ascend from the upper five thoracic segments of the spinal cord.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During rest, the vagal tone is dominant. There is continuous parasympathetic activity that has a negative chronotropic character.

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