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BIO 201 > Chapter 14 - Brain > Flashcards

Chapter 14 - Brain Flashcards

1
Q

composed of neurosomas, dendrites, & synapses

A

gray matter

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2
Q

the cortex of the cerebrum and the cerebellum is made of :

A

gray matter

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3
Q

composed of myelinated axons

A

white matter

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4
Q

the area deep to the the cortex of the cerebrum and the tracts of the spinal cord are made of:

A

white matter

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5
Q

layer of a developing embryo that the CNS originates

A

ectodermal layer

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6
Q

neural tube detached from the overlaying ectoderm and becomes:

A

the central canal

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7
Q

3 anterior expansions of the neural tube at 4 weeks:

A

forebrain, midbrain, & hindbrain

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8
Q

prosencephalon

A

forebrain

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9
Q

mesencephalon

A

midbrain

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10
Q

rhombencephalon

A

hindbrain

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11
Q

forebrain divides into:

A

telencephalon & diencephalon

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12
Q

hindbrain divides into:

A

metencephalon & myelencephalon

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13
Q

diencephalon develops into:

A

thalamus & hypothalamus

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14
Q

telencephalon develops into:

A

cerebral hemisphere

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15
Q

metencephalon develops into:

A

pons & cerebellum

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16
Q

myelencephalon develops into:

A

medulla oblongata

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17
Q

meningeal layers of the brain (superficial to deep)

A

dura mater, arachnoid mater, & pia mater

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18
Q

an inward fold of the dura mater that separates the right & left cerebral hemispheres

A

falx cerebri

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19
Q

an inward fold of the dura mater that separates the cerebellum from the posterior cerebral hemispheres

A

tentorium cerebelli

20
Q

an inward fold of the dura mater that separates the right & left halves of the cerebellum

A

falx cerebelli

21
Q

2 layers of the dura mater

A

periosteal layer & meningeal layer

22
Q

largest cerebral blood layers are found in the:

A

subarachnoid space

23
Q

4 ventricles of the brain:

A

2 lateral ventricle
third ventricle
fourth ventricle

24
Q

C shaped ventricle, one found in each hemisphere

A

lateral ventricle

25
Q

located inferior to corpus callosum, thalamus forms walls

A

third ventricle

26
Q

connected to the third ventricle by the cerebral aqueduct, between the pons and cerebellum

A

fourth ventricle

27
Q

mass of blood capillaries in a ventricle

A

choroid plexus

28
Q

CSF production:
30%________
30%________
40%________

A

30 - choroid plexus
30 - ependymal cells
40 - subarachnoid space

29
Q

CSF formed through:

A

filtration of plasma

30
Q

CSF flows through the ______ passages & around the brain in the _______ space.

A

ventricular - subarachnoid

31
Q

CSF - hydrostatic pressure due to:

A

continuous production

32
Q

CSF moves from the lateral ventricles to the 3rd ventricle through the:

A

interventricular foramina

33
Q

CSF moves from the 3rd ventricle to the 4th through the:

A

cerebral aqueduct

34
Q

3 pores in the 4th ventricle open into the:

A

subarachnoid space

35
Q

location of pores in the 4th ventricle

A

1 median pore

2 lateral pores

36
Q

_____ ______ extend through the dura mater into the superior sagittal sinus

A

arachnoid granulations

37
Q

functions of CSF

A

buoyancy, protection, & chemical stability

38
Q

brain receives __% of blood flow

39
Q

Brain consumes __% of oxygen and glucose

40
Q

loss of consciousness happens in:

A

10 sec w/o blood supply

41
Q

impairment of neuron damage happens in:

A

1-2 min w/o blood supply

42
Q

permanent neuron damage happens in:

A

4 min w/o blood supply

43
Q

spaces between endothelial cells are sealed by:

A

astrocyte feet

44
Q

blood-CSF barrier formed by:

A

tight junctions between ependymal cells

45
Q

substances that easily pass from blood to brain:

A 
O2 & CO2
alcohol
caffeine
nicotine
anesthetic drugs
46
Q

substances the pass less easily from blood to brain:

A

electrolytes & waste products (urea and creatine)

47
Q

3 structures developed from the diencephalon:

A

thalamus, hypothalamus, & epithalamus

BIO 201 (9 decks)

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