BIOL 2113 QUESTIONS AND ASWERS LATEST UPDATE 100% CORRECT A+ GRADED. Buy Quality Materials!

BIOL 2113 QUESTIONS AND ASWERS LATEST UPDATE
100% CORRECT A+ GRADED. Buy Quality Materials!

somatic motor neurons release
Acetylcholine (ACh)
autonomic post-ganglionic fibers release
norepinephrine (inhibitory) acetylcholine (excitatory)
cholinergic fibers
fibers that release ACh
Adrenergic fibers
release norepinephrine
autonomic nervous system
Preganglionic fibers - release ACh-
Postganglionic fibers - release norepinephrine (NE) or ACh at effectors- Effect is either
stimulatory or inhibitory
somatic nervous system
- All motor neurons release acetylcholine (ACh)-
Effect is always stimulatory
parasympathetic nervous system
rest and digest
-Fibers originate in the cranial and sacral region of the spinal cord
-Long preganglionic fibers and short post ganglionic fibers
-ganglia located in or near the visceral effector organ
sympathetic nervous system
fight or flight
-fibers originate from the thoracic and lumbar regions of the spinal cord.
- short pre-ganglionic fibers and long post-ganglionic fibers
-ganglia is close to the spinal cord
Nicotinic receptors
Always stimulatory; found on all post-ganglionic neurons.
muscarinic receptors
stimulatory or inhibitory
found on all effector cells stimulated by post-ganglionic cholinergic fibers
Effects of norepinephrine on a receptors
generally stimulatory
Effects of norepinephrine on β receptors
generally inhibitory
Mechanoreceptors
respond to touch, pressure, vibration, stretch, and itch
Thermoreceptors
respond to changes in temperature
Photoreceptors
respond to light
Chemoreceptors