Question

Sympathetic neural system induces

• A. secretion of digestive juices
• B. heartbeat
• C. secretion of saliva
• D. all of these

Answer 1

The Correct Option is B

The sympathetic neural system, also known as the sympathetic nervous system, is part of the autonomic nervous system that prepares the body for the "fight-or-flight" response during stressful situations. Let’s analyze the given options to understand which one is affected by the sympathetic neural system:

1. Secretion of digestive juices: The sympathetic nervous system generally inhibits the processes related to digestion. It reduces the secretion of digestive juices because digestion is not a priority during stressful situations. Therefore, this option is incorrect.
2. Heartbeat: The sympathetic nervous system increases the heart rate and the force of contractions to pump blood rapidly to vital organs and muscles, enabling a quick response. Thus, the sympathetic neural system induces an increase in heartbeat, making this the correct answer.
3. Secretion of saliva: In stressful situations, the sympathetic nervous system reduces the secretion of saliva, often leading to a dry mouth. Hence, this option is incorrect as it decreases saliva secretion rather than inducing it.
4. All of these: Considering the above points, not all functions listed are induced by the sympathetic nervous system, making this option incorrect.

Conclusion: The sympathetic neural system primarily affects the "fight-or-flight" response by increasing the heartbeat. Therefore, the correct answer is heartbeat.