Nerve questions

Question 1

How do you distinguish myelinated from unmyelinated nerve fibers in an H&E stained tissue section? TEM?

Answer 1

Schmidt-Lanterman cleft and node of ranvier

Question 2

What is a node of Ranvier?

Answer 2

Propagation of APs occur there

Question 3

The perineurium is the most——-of the connective tissue components of a peripheral nerve

Answer 3

Prominent and visible

Question 4

What is a fixative that will preserve myelin for light microscopy?

Answer 4

?

Question 5

What type of neuron has its cell body in a dorsal root ganglion?

Answer 5

Pseudounipolar sensory neuron

Question 6

Which type of ganglion contains numerous unmyelinated nerve fibers?

Answer 6

Autonomic ganglion

Question 7

What type of receptors are located in the postsynaptic membrane of a NMJ?

Answer 7

Acetylcholine receptors

Question 8

What morphological fetters distinguish a pacinian from a meissner’s corpuscle?

Answer 8

Pacinian- rings

Meissner- strips and smaller

Question 9

What are the functions of sensory free nerve endings in the skin?

Answer 9

Hot/cold
itching
touch
pain

Question 10

List two functions of a muscle spindle

Answer 10

Maintaing posture and coordinating walking