PNS
Interlacing nerve networks that allow innervation by multiple spinal nerves
What are nerve plexuses?
True or false - all people perceive pain at the same stimulus intensity
What is true?
When you taste something delicious, this type of receptor is activated to send signals to the CNS
What are chemoreceptors?
What is two neurons?
On the anterior side, this transparent layer bends light as it enters the eye
What is the cornea?
An area of skin innervated by cutaneous branches of a single spinal nerve
What is a dermatome?
The bundles of fibers (fascicle) within a nerve, are covered by which connective tissue covering
What is the perineurium ?
If you hold an ice cube in your bare hand for long enough, you will eventually feel pain. What receptor is activated?
What are nociceptors?
In addition to ACh, this neurotransmitter can also be released by postganglionic fibers in the ANS
What is norepinephrine/epinephrine?
Very rare, this type of neuron is found in the retina of the eye
What is bipolar?
The lowest level of motor hierarchy that consists of reflexes and automatic movements
What is the segmental level?
After an axon is damaged and begins to regenerate, which cells form the regeneration tubes?
What are schwann cells?
A type of free nerve ending that fuctions as light touch receptors
What are tactile (Merkel) discs?
The effect of ACh is always stimulatory on this type of receptor
What are nicotinic receptors?
What is constrict?
Does the tendon reflex produce muscle relaxation or muscle contraction?
What is muscle relaxation?
What type of fibers are connected to the spinal cord via the ventral roots?
What are efferent/motor fibers?
These encapsulated proprioceptors respond to stretch in muscle
What are muscle spindles?
If you were walking down the street and saw Beyonce, which division of the ANS would be activated?
What is the Sympathetic Division?
This structure of the ear is composed of connective tissue and transfers sound energy to bones of the middle ear
What is the tympanic membrane (eardrum) ?
A fibrous extension, covered with pia mater, that anchors the spinal cord to the coccyx
What is the filum terminale?
What is the name and function of Cranial nerve V?
What is the trigeminal? What is sensory and motor?
We are able to touch our fingers to our nose, even with eyes closed, because of this class of receptor
What are proprioceptors?
Sympathetic preganglionic fibers pass through the _______ _______ before entering the trunk ganglia
What are the white rami?
Located within the hear, these sensory receptors detect rotational acceleration
What are the crista ampullares?