neurons and their parts

Question 1

axon

Answer 1

conducting fiber

Question 2

hillock

Answer 2

most effective region of the axon

Question 3

nissl bodies

Answer 3

rough endoplasmic reticulum synthesizing proteins in neurons

Question 4

dendrites

Answer 4

receives information

end of axon

Question 5

soma

Answer 5

cell body of a neuron

Question 6

neurons

Answer 6

carry/transmit information by conduction of electrical impulses or action potentials

Question 7

neuroglia

Answer 7

provide support and matinenance functions for neural tissue (CANNOT TRANSMIT POTENTIALS)

Question 8

schwann cells

Answer 8

PNS

insulates and ASSISTS in regeneration and repair of axons

Question 9

oligodendrocytes

Answer 9

CNS

insulates and RESISTS regeneration of axons

• stroke is hard to treat because oligodendrocytes don’t allow regeneration

Question 10

astrocytes

Answer 10

CNS

form blood-brain barrier

Question 11

microglia

Answer 11

CNS

“sanitation department”

Question 12

satellite cells

Answer 12

PNS

provide support within ganglia (clusters of functionally united neurons)

Question 13

ependymal cells

Answer 13

CNS

secrete CSF within brain ventricles, provide brain-CSF barrier

• situated in lateral ventricles and third ventricles

Question 14

afferent

Answer 14

SENSORY / ASCENDING

bring information from effector organs and tissues to PNS, then CNS for interpretation

Question 15

efferent

Answer 15

MOTOR / DESCENDING

coming from CNS and PNS to effector organs and tissues to “make things happen”

Question 16

associative

Answer 16

INTERNEURONS

“middle men” that balance between the two

• MAJORITY OF NEURONS

Question 17

synaptic end bulb

Answer 17

secretes synaptic vesicles containing neurotransmitters