Which of the following is a target for the sympathetic nervous system?

The sympathetic nervous system, a part of the autonomic nervous system, targets various organs and systems in the body to prepare it for the 'fight or flight' response. This includes:

1. Heart: The sympathetic nervous system increases the heart rate and the force of heart contractions, thereby increasing blood pressure.

2. Lungs: It dilates the bronchioles in the lungs, which increases airflow and allows for greater oxygen exchange.

3. Digestive System: It slows down digestion as blood is redirected towards muscles and other systems.

4. Eyes: It dilates the pupils to allow more light in and improve vision.

5. Sweat Glands: It stimulates sweat production to cool the body.

6. Blood Vessels: It constricts blood vessels in non-essential systems and dilates vessels in muscles and the heart to increase blood flow and oxygen supply.

7. Adrenal Medulla: It stimulates the release of adrenaline and noradrenaline, which further aids in preparing the body for a stressful situation.

So, the sympathetic nervous system targets a wide range of organs and systems in the body to prepare it for a stressful or emergency situation.