Sympathetic Nervous System

What triggers the body's stress response?

• Listening to loud music

• Eating a large meal

• Sleeping

• Facing a life-threatening situation

What is the role of the sympathetic nervous system during stress?

• It helps the body digest food more efficiently

• It decreases heart rate and muscle readiness

• It focuses on long-term body maintenance

• It prioritizes body functions necessary for immediate survival

Which chemical is released by preganglionic fibers in the sympathetic nervous system?

• Dopamine

• Serotonin

• Acetylcholine

• Insulin

How can norepinephrine function in the body?

• Neither as a neurotransmitter nor a hormone

• Only as a neurotransmitter

• Only as a hormone

• Either as a neurotransmitter or a hormone

What effect does the activation of alpha receptors have on blood vessels?

• It only affects heart rate

• It increases blood flow

• It has no effect

• It decreases blood flow