Sympathetic nervous system induces

Options

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

Explanation

### Step-by-Step Solution:

1. **Understanding the Nervous System**: The nervous system is divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The PNS is further divided into the autonomic nervous system (ANS) and the somatic nervous system.

2. **Autonomic Nervous System**: The ANS controls involuntary bodily functions and is divided into two branches: the sympathetic nervous system and the parasympathetic nervous system.

3. **Sympathetic Nervous System Function**: The sympathetic nervous system is often referred to as the "fight or flight" system. It prepares the body to respond to stressful situations by inducing several physiological changes.

4. **Key Functions of the Sympathetic Nervous System**: One of the primary functions of the sympathetic nervous system is to increase heart rate. This is crucial during stressful situations as it helps pump more blood to muscles and vital organs.

5. **Exclusion of Other Options**: The question may provide options such as secretion of digestive juices or saliva. These functions are primarily controlled by the central nervous system and not directly by the sympathetic nervous system. Therefore, they are not induced by the sympathetic division.

6. **Conclusion**: The correct answer to the question "Sympathetic nervous system induces what?" is the acceleration of heartbeat.

### Final Answer:
The sympathetic nervous system induces an increase in heartbeat.

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