BIO Lecture Exam #4

Front

What do the parasympathetic and sympathetic divisions have in common?

Back

Most nerve fibers from both divisions innervate many of the same effectors.

Front

What is the primary function of the vagus nerve in the parasympathetic system?

Back

The vagus nerve is responsible for innervating the heart, lungs, and digestive tract, playing a crucial role in the parasympathetic response.

Front

What are the two main divisions of the autonomic nervous system?

Back

The two main divisions are the sympathetic and parasympathetic nervous systems.

Front

What is the role of preganglionic fibers in the autonomic nervous system?

Back

Preganglionic fibers transmit signals from the central nervous system to ganglia, where they synapse with postganglionic fibers.

Front

Where are the ganglia of the sympathetic nervous system typically located?

Back

The ganglia of the sympathetic nervous system are located close to the spinal cord.

Front

What is the function of the fibrous layer of the eye?

Back

The fibrous layer provides structural support and protection to the eye.

Front

What is the primary neurotransmitter used by the parasympathetic nervous system?

Back

Acetylcholine is the primary neurotransmitter used by the parasympathetic nervous system.

Front

What is the difference between the sympathetic and parasympathetic responses?

Back

The sympathetic response prepares the body for 'fight or flight', while the parasympathetic response promotes 'rest and digest' activities.

Front

Which cranial nerves are involved in the parasympathetic nervous system?

Back

The oculomotor, facial, glossopharyngeal, and vagus nerves are involved in the parasympathetic nervous system.

Front

What is the significance of the vagus nerve in regulating heart rate?

Back

The vagus nerve decreases heart rate by releasing acetylcholine at the heart's pacemaker cells.