Brain

Question 1

5 main parts

Answer 1

Cerebrum
Diencephathon
Midbrain
Pons
Medulla oblongata
Cerebellum

Question 2

Choroid plexuses

Answer 2

Specialized areas of capillaries in pia mater of the ventricles that makes CSF

Question 3

Ventricles

Answer 3

4 chambers connected via ducts

The last one becomes the central canal of the spinal cord

Question 4

CSF

Answer 4

Cerebral spinal fluid

Circulated through ventricles and into central canal of spinal cord and absorbed into blood

Maintains a stable ionic concentration in CNS

Cushions brain and spinal cord

Gives wastes a pathway to blood

Question 5

Cerebrum

Answer 5

Lobes of hemispheres: frontal parietal temporal occipital and insula

Made of gray and white matter

Interprets sensory info, voluntary muscle movement, memory, intelligence, personality

Question 6

Gyri

Answer 6

Elevated surface ridges on cerebrum

Question 7

Sulcus

Answer 7

Shallow groove

Question 8

Fissure

Answer 8

Deep groove

Question 9

Cerebral cortex

Answer 9

Thin layer of gray matter covering the cerebrum

Contains most neuron cell bodies

Question 10

Hemisphere dominance

Answer 10

One side of the cerebrum is dominant (left side in most people)

Question 11

Corpus callosum

Answer 11

Connects and transfers info from nondominant to dominant hemisphere

Question 12

Electroencephalogram ( EEG )

Answer 12

Shows electrical activity of the brain neurons

Question 13

Meninges

Answer 13

Surround brain and spinal cord
Dura mater: tough outermost layer
Arachnoid: second layer with some lymphatic fluid
Pia mater: innermost layer bound to neural tissue

Question 14

Epidural space

Answer 14

Between dura mater of spinal cord and walls of vertebral canals

Question 15

Subdural space

Answer 15

Between dura mater and second meningeal layer

Question 16

Subarachnoid space

Answer 16

Filled with CSF
Deep in arachnoid
Delicate web of collagen and elastic

Question 17

Spinal cord

Answer 17

Controls spinal reflexes

Highway for sensory/motor impulses to the brain

Question 18

Cervical enlargement

Answer 18

Supplies nerves to the shoulder girdles and upper limbs

Question 19

Lumbar enlargement

Answer 19

Provides nerves to pelvis and lower limbs

Question 20

Central canal

Answer 20

Narrow internal passageway filled with CSF

Question 21

Posterior median sulcus

Answer 21

Shallow groove in posterior surface if spinal cord

Question 22

Anterior median fissure

Answer 22

Deep groove in anterior surface of spinal cord

Question 23

Dorsal roots

Answer 23

Contain axons of sensory neurons and bring sensory info to the spinal cord

Question 24

Ventral roots

Answer 24

Contain axons of CNS motor neurons

Question 25

Spinal nerves

Answer 25

Sensory and motor roots bound together to form the outside of the vertebral canal Are mixed nerves

Question 26

Posterior gray horns

Answer 26

Contain sensory nuclei

Question 27

Anterior gray horns

Answer 27

Motor control of skeletal muscles

Question 28

Gray commissure

Answer 28

Connects horns on either side of the spinal cord

Question 29

Ascending tracts

Answer 29

Carry sensory info towards the brain

Question 30

Descending tracts

Answer 30

Convey motor commands into spinal cord

Question 31

Ganglia

Answer 31

Relay station for motor impulses

Question 32

Basal nuclei

Answer 32

Gray matter in the hemispheres

Question 33

Limbic system

Answer 33

In cerebrum Emotions Long term memory Link cerebral cortex with brainstem

Question 34

Diencephalon

Answer 34

Has switching and relay centers Epithalamus Thalamus Hypothalamus

Question 35

Midbrain

Answer 35

Connects diencephalon and pons Controls visual and some auditory reflexes Can sense pain touch and temp and send messages

Question 36

Optic chiasma

Answer 36

Optic nerves cross | in midbrain

Question 37

Pituitary gland

Answer 37

In midbrain Sits in sella turcica Makes hormones and milk

Question 38

Pons

Answer 38

Connects cerebellum with midbrain diencephalon cerebrum and spinal cord Controls breathing

Question 39

Medulla oblongata

Answer 39

Inside foramen magnum and controls visceral centers and sneezing coughing and puking

Question 40

Reticular formation

Answer 40

Gray matter that activates the cerebral cortex | if injured people will go in a coma

Question 41

Cerebellum

Answer 41

Balance Called arbor vitae Damaged by drugs alcohol and strokes

Question 42

Nerves to know

Answer 42

``` Optic: impulses from eyes Auditory: impulses from ears Phrenic: controls diaphragm Olfactory: sense of smell Vagus: heart beat ```