Question

Which division of the PNS transmits action potentials from the CNS to cardiac muscle?

a) Somatic nervous system
b) Autonomic nervous system
c) Sympathetic nervous system
d) Parasympathetic nervous system

Answer 1

The division of the Peripheral Nervous System (PNS) that transmits action potentials from the Central Nervous System (CNS) to cardiac muscle is part of the autonomic nervous system (Option B).

Step-by-step explanation:

The autonomic nervous system, particularly the sympathetic division, transmits action potentials from the CNS to cardiac muscle, causing increased heart rate and sweating during exercise. Specifically, two divisions of the autonomic nervous system are involved.

The sympathetic nervous system carries signals that increase the heart rate and is responsible for the 'fight or flight' response, while the parasympathetic nervous system carries signals that decrease the heart rate and is related to 'rest and digest' functions. During exercise, the sympathetic nervous system would be activated, causing an increased heart rate and sweating as part of the physiological response to exercise.

Thus, the correct option is B.