Structure and Function of the Nervous System

Front

What are the two main divisions of the nervous system?

Back

Central Nervous System (CNS) and Peripheral Nervous System (PNS).

Front

What are the major components of the Central Nervous System (CNS)?

Back

The brain and spinal cord.

Front

What is the primary role of the Peripheral Nervous System (PNS)?

Back

To connect the CNS to the organs, limbs, and skin.

Front

What are the two types of neurons in the PNS?

Back

Sensory (afferent) neurons and Motor (efferent) neurons.

Front

What is the function of sensory receptors?

Back

To monitor numerous external and internal stimuli that can be interpreted as touch, temperature, taste, smell, sound, blood pressure, and body position.

Front

What is the role of the brain in the nervous system?

Back

The brain processes sensory input and initiates responses.

Front

What is homeostasis in the context of the nervous system?

Back

The maintenance of a constant internal environment through the detection, interpretation, and response to changes.

Front

What are the two divisions of the autonomic nervous system?

Back

Sympathetic nervous system and Parasympathetic nervous system.

Front

What is the function of the sympathetic nervous system?

Back

To accelerate heart rate, constrict blood vessels, dilate pupils, and raise blood pressure (fight or flight response).

Front

What is the function of the parasympathetic nervous system?

Back

To slow heart rate and increase intestinal and gland activity (rest and digest).