Exploring the Autonomic Nervous System

Front

What is the autonomic nervous system?

Back

The autonomic nervous system (ANS) is a part of the peripheral nervous system that controls involuntary bodily functions, including heart rate, digestion, and respiratory rate.

Front

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

Back

The two main branches are the sympathetic nervous system and the parasympathetic nervous system.

Front

What is the primary function of the sympathetic nervous system?

Back

The sympathetic nervous system prepares the body for 'fight or flight' responses during stressful situations.

Front

What is the primary function of the parasympathetic nervous system?

Back

The parasympathetic nervous system promotes 'rest and digest' activities, conserving energy and facilitating bodily functions.

Front

How does the sympathetic nervous system affect the pupils of the eyes?

Back

The sympathetic nervous system dilates the pupils to allow more light in, enhancing vision during stressful situations.

Front

How does the parasympathetic nervous system affect the pupils of the eyes?

Back

The parasympathetic nervous system constricts the pupils, reducing light entry and focusing on near objects.

Front

What neurotransmitter is primarily released by the sympathetic nervous system?

Back

Norepinephrine is the primary neurotransmitter released by the sympathetic nervous system at target organs.

Front

What effect does muscarinic stimulation have on the heart?

Back

Muscarinic stimulation causes negative chronotropy (decreased heart rate) and dromotropy (decreased conduction velocity) in the heart.

Front

What is the role of acetylcholine in the autonomic nervous system?

Back

Acetylcholine is the primary neurotransmitter used by the parasympathetic nervous system to communicate with target organs.

Front

What is the effect of the sympathetic nervous system on blood pressure?

Back

The sympathetic nervous system increases blood pressure by constricting blood vessels and increasing heart rate.