Midterm 1

Question 1

What does the Peripheral Nervous System consist of

Answer 1

Cranial nerves
Spinal Nerves
Ganglia

Question 2

Name the classification of neurons

Answer 2

• pseudounipolar
• bipolar
• multipolar

Question 3

What is the purpose of Schwann cells

Answer 3

they hold fibers in place

Question 4

T/F
Perinerium = surrounds the entire nerve
epinerium = surrounding one fiber
Endonerium = surrounds the fascicle

Answer 4

False
Endonerium = surrounding one fiber
Epinerium = surrounding the nerve
perinerium = surrounding the fascicle

Question 5

Where are the cell bodies of motor neurons are located in the CNS

Answer 5

Brainstem or spinal cord

Question 6

Cell bodies of sensory neurons are located in where in the PNS

Answer 6

Dorsal root ganglion/ geniculate ganglion

Question 7

Where are the Preganglionic sympathetic neurons located in the CNS

Answer 7

lateral horn of the spinal cord T1 to L2

Question 8

Where are the Postganglionic sympathetic neurons located in the PNS

Answer 8

para and prevertebral ganglia - sympathetic chain

Question 9

Cytoplasmic process of neuron usually ___ and ____

Answer 9

axon

coverings

Question 10

Epineurium is connective tissue covering around several ___

Answer 10

fascicles

Question 11

what is the AKA of a Schwann cell

Answer 11

neurolemma

Question 12

T/F

Schwann cells are only found in CNS

Answer 12

False

only in PNS - always associated with all nerve fibers of PNS

Question 13

Schwann cell wrapped with protein = ___

Schwann cell wrapped without protein= ___

Answer 13

• myelinated

- unmyelinated

Question 14

T/F

most cells are unmyelinated

Answer 14

False most are

Question 15

Nuclear material is made up of what

Answer 15

chromosomes

Question 16

the phospholipid layer of the nucleus does what type of function

Answer 16

holds the nuclear membrane

Question 17

The structural classification of a neuron is related to what

Answer 17

• where the nucleus lis located

- how many cellular processes enter or go off of nuclear area (cell body)

Question 18

which type of neuron is most common in the body

Answer 18

Multipolar

Question 19

Does Multipolar neurons carry efferent or afferent signals

Answer 19

Efferent ( mostly motor)

Question 20

AKA for Unipolar

Answer 20

pseudounipolar

Question 21

T/F

pseudo unipolar only carries sensory information

Answer 21

True

Question 22

T/F

pseudounipolar has one cellular process on each side of the cell body

Answer 22

False that is Bipolar

Question 23

in a pseudounipolar neuron… the dendritic side ____ and the axonal side _____

Answer 23

receives information
sends out information
( same goes for bipolar neurons)

Question 24

____ neurons are only found in the head

Answer 24

Bipolar

Question 25

Which neurons are associated with special senses like sight, hearing, taste and smell

Answer 25

Bipolar neurons

Question 26

Name the organelles located in the cytoplasm and name their functions

Answer 26

- nucleus - control center - Rough ER - Protein producer - Smooth ER - Lysosomes - self- destruction of cell - mitochondria = energy producer - Golgi bodies= storage ( proteins or glycoproteins) - Cytoskeleton= transportation

Question 27

describe what happens in a nerve injury ? where does the lesion occur? what degeneration is it usually called?

Answer 27

- lesion occurs distally ---> myelin degenerates----> debri left behind---> - Wallerian degeneration

Question 28

what is chromatolysis

Answer 28

cell body will change to survive

Question 29

Anterograde Transport goes ___ | Retrograde Transport goes ___

Answer 29

down | - up

Question 30

Describe the Following - Ventricular Zone - Intermediate zone - Marginal Zone

Answer 30

- Precursor cells ( increasing in numbers) - Blast cells ( neuro/glial) - Mature neurons ( fibers sending out called rays