Autonomic Nervous System

These flashcards cover key concepts related to the autonomic nervous system, including its divisions, functions, and major neurotransmitters.

Autonomic Nervous System (ANS)

A part of the peripheral nervous system that controls involuntary bodily functions.

Central Nervous System (CNS)

The brain and spinal cord, responsible for processing information.

Peripheral Nervous System (PNS)

The part of the nervous system that connects the CNS to the limbs and organs.

Sensory (afferent) division

Transmits sensory information to the CNS.

Motor (efferent) division

Transmits motor commands from the CNS to the body.

Somatic Nervous System

Part of the PNS that controls voluntary movements.

Sympathetic division

Part of the ANS that prepares the body for 'fight or flight'.

Parasympathetic division

Part of the ANS that promotes 'rest and digest' functions.

Acetylcholine (ACh)

A neurotransmitter used in both the parasympathetic and sympathetic nervous systems.

Norepinephrine (NE)

A neurotransmitter primarily used in the sympathetic nervous system.

Effectors

Organs or cells that respond to nerve signals.

Ganglion

A cluster of nerve cell bodies in the PNS.

Preganglionic fibers

Nerve fibers that carry signals from the CNS to a ganglion.

Postganglionic fibers

Nerve fibers that carry signals from ganglia to effectors.

Neurotransmitter

Chemical messengers that transmit signals across a synapse.

Cholinergic fibers

Nerve fibers that release acetylcholine.

Adrenergic fibers

Nerve fibers that release norepinephrine.

Epinephrine

A hormone also known as adrenaline, released during fight or flight response.

Blood vessels

The channels through which blood flows to deliver nutrients and oxygen.

Visceral organs

Internal organs, particularly those within the abdomen.

Neurotransmitter activity

The effect of neurotransmitters on target cells or organs.