nervous system 1

Question 1

• The hydra

Answer 1

○ Ancient simple invertebrate
§ Has out skin - ectoderm
§ Inner layer - endodermal cells

Question 2

CNS developed from

Answer 2

neural tube ectoderm

Question 3

PNS developed from

Answer 3

neural crest ectoderm

Question 4

dendrites

Answer 4

receive info from either another neurone or a sensory receptor

Question 5

Nissle substance

Answer 5

RNA on ribosomes
§ Responsible for making protein: neurotransmitter
§ Used to act on signal

Question 6

soma

Answer 6

cell body
not myelinated
makes up grey matter

Question 7

hollick

Answer 7

point where axon leaves the soma

Question 8

axon

Answer 8

output end
myelinated
white matter

Question 9

unipolar

Answer 9

only axon and no dendrite

Question 10

bipolar

Answer 10

axon and dendrite

Question 11

multipolar

Answer 11

multiple dendrites

Question 12

pseudo unipolar

Answer 12

has only one thing coming out of it but it has an axon and dendrite component
found in dorsal root ganglion

Question 13

myelin in PNS made from

Answer 13

Schwann cells

Question 14

myelin in CNS made from

Answer 14

oligodendroglia

Question 15

cells that make myelin sheaths

Answer 15

glial cells

Question 16

nodes of ranvier

Answer 16

increase conduction speed

Question 17

saltatory conduction

Answer 17

signal jumps between myelin sheaths

Question 18

Astroglia

Answer 18

mediate the nutrition of other neurons
communicate between artery and neurones to allow diffusion
only allows cartain things - blood brain barrier

Question 19

Ependymal cells

Answer 19

make cerebral spinal fluid (CSF)

Question 20

Microglia

Answer 20

phagocytes of the CNS

Digest and remove material that astrocytes cant (dead cells etc.)

Question 21

3 parts of the brain

Answer 21

forebrain
midbrain
hindbrain

Question 22

forebrain

Answer 22

prosencephalon

Question 23

prosencephalon divided into

Answer 23

diencephalon

telencephalon

Question 24

§ Diencephalon (Die)

Answer 24

□ Between telencephalon and midbrain

Question 25

§ Telencephalon (Tel)

Answer 25

□ Last brain - last to evolve and fully develop
□ Cerebrum
□ Most frontal

Question 26

midbrain

Answer 26

○ Mesencephalon (Mes) - middle of brain

Question 27

• Hindbrain

Answer 27

○ Rhombencephalon (Rho) - diamond shape

Question 28

Rhombencephalon (Rho)

Answer 28

myelencephalon

metencephalon

Question 29

§ Myelencephalon (Mye)

Answer 29

□ lower component

□ Medulla

Question 30

§ Metencephalon (Met)

Answer 30

□ Pons and cerebellum

□ Higher component (closer to front)

Question 31

1st and 2nd ventricle

Answer 31

in the telencephalon (at the top)

Question 32

intreventricular foramen of Monroe

Answer 32

between tel and die

Question 33

3rd ventricle

Answer 33

at diencephalon

Question 34

cerebral aqueduct

Answer 34

links 3rd ventricle to 4th ventricle

mesencephalon

Question 35

median aperture of magendie

Answer 35

tube below 4th ventricle

Question 36

lateral apertures of Lushka

Answer 36

tubes exit at the 4th ventricle

Question 37

central canal

Answer 37

below 4th ventricle

Question 38

brainstem made of

Answer 38

midbrain, pons, medulla

Question 39

telencephalon makes

Answer 39

cerebrum

Question 40

diencephalon makes

Answer 40

thalamus

Question 41

mesencephalon makes

Answer 41

midbrain

Question 42

metencephalon makes

Answer 42

pons and cerebellum

Question 43

myelencephalon makes

Answer 43

medulla oblongata