Autonomic Nervous System (ANS)

Parasmpathetic Division

Sympathetic Division.

Preganglionic neurons

Postganglionic neurons

Preganglionic neurons

Postganglionic neurons

Also called the thoracolumbar division because of its preganglionic fibers in the spinal cord.

adrenergic and use norepinephrine

Collateral Ganglia

originate in the thoracic and lumbar levels of the spinal cord

send axons to sympathetic ganglia

originate in the brain and in the sacral level

send axons to the ganglia located in or near the effector organs

Also known as the craniosacral division because the preganglionic fibers are in the brain

Collateral Ganglia

fivers in the spankchnic nerves synapse in the collateral ganglia, prevertebral, and ganglia.

those include the celiac, superior mesenteric, and inferior mesenteric ganglia.

in the digestive, urinary, and reproductive systems

originate in the midbrain, pons, medula oblongata

terminal ganglia

supply the postganglionic fibers that synapse with the effector cells

a1 - Adrenergic
short-term constriction

dilates pupil (eye)

constricts the sphincters in the intestines

inhibits myenteric plexus in the intestines

contracts the urethral sphincter

ejaculates the penis

contracts the uterus during pregnancy

contracts the pilomotor smooth muscle (skin)

increases apocrine in palms causing sweat

a2 - Adrenergic
hypertension, raises blood pressure and improves male sexual functions

intestinal secretion

b1 - Adrenergic

increases heart rate.

vasoconstriction

b2 - Adrenergic

relaxes skeletal muscle vessels

relates bronchiolar smooth muscles

relaxes smooth muscle walls

relaxes bladder wall

relaxes uterus when pregnant

sweat glands release acetylcholine for the activation of muscarinic receptors

Muscarinic Cholinergic

relaxes skeletal muscle vessels

ACh activates G-Proteins coupled receptor, opening channels for the K+

increases thermoregulatory in the skins sweat glands

cholinergic and use acetylcholine as their neurotransmitter

Muscarinic

contracts pupil using the circular muscle

decreases heart rate using the sinoatrial node

bronchoconstriction. bronchiolar smooth muscle

contracts smooth muscle walls

relaxes sphincters in smooth muscles

stimulates secretion in smooth muscles

contracts bladder wall

relaxes urethral sphincters

erection of the penis

located in ciliary ganglion, pterygopalatine and submandibular ganglia, otic ganglion

fibers found in cervical ganglia, T1-T5, T9-T12