Which of the following are effects of the parasympathetic division on the digestive system?

• A. Inhibition of salivary gland activity
• B. Constriction of blood vessels in the digestive tract
• C. Increased secretion of digestive enzymes
• D. Decreased peristalsis in the intestines

Answer: (C)

Verified step by step guidance

1. Understand the role of the parasympathetic division: It is part of the autonomic nervous system responsible for 'rest and digest' activities, promoting functions that conserve energy and enhance digestion.
2. Identify the effects of the parasympathetic division on the digestive system: It generally stimulates activities that aid digestion, such as increasing the secretion of digestive enzymes and enhancing peristalsis.
3. Evaluate each option: Consider how each option aligns with the parasympathetic division's role. Increased secretion of digestive enzymes is consistent with its function, while inhibition of salivary gland activity and constriction of blood vessels are not typical parasympathetic effects.
4. Consider the physiological processes: Increased secretion of digestive enzymes helps break down food, while increased peristalsis aids in moving food through the intestines, both of which are stimulated by the parasympathetic division.
5. Conclude with the correct effect: Based on the understanding of the parasympathetic division's role, the correct effect on the digestive system is increased secretion of digestive enzymes.