cells of the nervous system

Question 1

the nucleus, endoplasmic reticulum, and ribosomes can be found in what part of the neuron?

Answer 1

soma (cell body)

Question 2

what is the purpose of dendrites?

Answer 2

receive incoming messages from other cells

Question 3

_____________ integrates incoming signals

Answer 3

axon hillock

Question 4

a neuron only fires an action potential if multiple presynaptic cells release neurotransmitters onto the dendrites of the neuron, this is an example of __________

Answer 4

summation

Question 5

___________ is a fatty membrane to prevent signal loss or crossing of signals

Answer 5

myelin

Question 6

____________ maintains the electrical signal within one neuron

Answer 6

myelin sheath

Question 7

myelin (increases / decreases) the speed of conduction in the axon

Answer 7

increases

Question 8

in the CNS, myelin is produced by ____________

Answer 8

oligodendrocytes

*there are many sites in the sea

Question 9

in the PNS, myelin is produced by ___________

Answer 9

schwann cells

*swans like to pee

Question 10

T / F - nodes of ranvier are critical for rapid signal conduction

Answer 10

true

Question 11

____________ is enlarged and flattened to maximize transmission of the signal to the next neuron and ensure proper release of neurotransmitters

Answer 11

nerve terminal / synaptic bulb

Question 12

T / F - neurons are physically connected to each other

Answer 12

false

Question 13

there is a small space between neurons called the ___________ into which the terminal portion of the axon releases neurotransmitters

Answer 13

synpatic cleft

Question 14

what three parts make up the synaptic cleft?

Answer 14

1. nerve terminal
2. synaptic cleft
3. postsynpatic membrane

Question 15

in the PNS, multiple bundles of neurons are called ____________

Answer 15

nerves

*when you’re nervous, you pee

Question 16

in the CNS, axons may be bundles to form ___________

Answer 16

tracts

*it is important to see tracks

Question 17

what type of information can nerves carry?

Answer 17

sensory, motor, mixed

*they can carry more than one type of information

Question 18

T / F - unlike nerves, tracts can only carry one type of information

Answer 18

true

Question 19

cell bodies of neurons of the same type are clustered to form ________

Answer 19

ganglia

Question 20

_____________ nourish neurons and forms the blood-brain barrier, which controls the transmission of soluts from the bloostream into the nervous tissue

Answer 20

astrocytes

Question 21

___________ line the centricles of the brain and produce cerebrospinal fluid which serves as a shock absorber

Answer 21

ependymal cells

Question 22

___________ ingest and break down waste products and pathogens in the CNS

Answer 22

microglia

Question 23

___________ produce myelin in the CNS

Answer 23

oligodendrocytes

Question 24

____________ produce myelin in the PNS

Answer 24

schwann cells