anatomy ch 15 pt 2 Flashcards
What does spinal nerve pathway contain?
Both white and gray rami and on and off trunks
What is intramural nerve?
In organ
What is terminal nerve?
By organ
What is adrenal medulla pathway?
Stay in fight or flight
What are autonomic plexuses?
Network of nerves within thoracic and abdominopelvic cavities
What do plexus have?
Sympathetic axons from cervical and thoracic trunk and parasympathetic axons from vagus nerve
What does cardiac plexus do?
Quicken and slow the heart
What does pulmonary plexus do?
Bring in more air and going back to normal
What does esophageal plexus do?
Decreases motility and coordinates opening of cardiac sphincter with swallowing
What does abdominal aortic plexus do?
Innervates all abdominal and some pelvic organs
What does hypogastric plexus do?
Innervates viscera within pelvic region
Cells that release ACh
Cholinergic neurons
Cells that release NE
Adrenergic neurons
What is nicotinic receptors?
Directly open a channel and bring in sodium
What is muscarinic receptors?
Does not directly open a channel and needs a second messenger
What is catecholamine?
Special chemical messenger, biogenic amines (modified amino acids), ligands
Where is nicotinic receptors located?
Found on all ganglionic neurons and adrenal medulla cells
Where is muscarinic receptors located?
Parasympathetic division
B1 receptor location
Located in heart and in kidney
B1 receptor effect of binding
Increase heart rate and force and stimulates renin secretion
B2 receptor location
Located in smooth muscle of vessels to heart, liver, skeletal muscles, and lungs
B2 receptor effect of binding
Cause vessel dilation, bronchodilation, and relaxation
B3 receptor location
Located in adipose, urinary bladder, and smooth muscle
B3 receptor effect of binding
Triglyceride breakdown for fuel and relaxion
A1 receptor location
Located in most blood vessels, arrector pili muscles, uterus
A1 receptor effect of binding
Vasoconstriction, goose bumps, contraction, closing, pupil dilation
A2 receptor effect of binding
Inhibit insulin secretion and constriction
A2 receptor location
Located throughout CNS, in pancreas, G1 tract sphincters
Reflex arc system
Receptor -> sensory relay to CNS -> CNS integration center -> motor neuron -> effector
