Quiz 8 - CNS: Brain

Question 1

facts about brain

Answer 1

CNS - brain and spinal cord
brain contains ~ 20 billion neurons
each neuron makes 1-10,000 synapses with other neurons

Question 2

major regions of the brain

Answer 2

cerebrum
diencephalon
brain stem
cerebellum

Question 3

cerebrum

Answer 3

paired hemispheres consisting of the cortex, white matter and basal nuclei

Question 4

parts of cerebral cortex

Answer 4

sulci, gyri, and fissures

Question 5

sulci

Answer 5

shallow grooves

Question 6

gyri

Answer 6

ridges

Question 7

fissures

Answer 7

deep grooves

Question 8

what are the cerebral lobes divided by

Answer 8

sulci

Question 9

cerebral lobes

Answer 9

frontal
parietal
temporal
occipital

Question 10

frontal lobe

Answer 10

primary motor cortex
somatic motor association cortex
prefrontal cortex

Question 11

primary motor cortex

Answer 11

direct voluntary movements by controlling somatic motor neurons

Question 12

somatic motor association cortex

Answer 12

coordinates motor activities of learned movement patterns

Question 13

parietal lobe

Answer 13

primary sensory cortex

somatic sensory association cortex

Question 14

primary sensory cortex

Answer 14

receives somatic sensory information (ex: touch, pain, taste, temperature, pressure, etc.)

Question 15

somatic sensory association cortex

Answer 15

integrate and process sensory data (ex: comprehend size, form and texture of objects)

Question 16

temporal lobe

Answer 16

auditory cortex

olfactory cortex

Question 17

auditory cortex

Answer 17

hearing, perception of sound

Question 18

olfactory cortex

Answer 18

smell, perception of odors

Question 19

occipital lobe

Answer 19

visual cortex - vision and coordination of eye movement

Question 20

layers of cerebrum

Answer 20

gray matter and central white matter

Question 21

gray matter

Answer 21

outer layer, occupy majority of cell body

Question 22

central white matter

Answer 22

consists of deep myelinated fibers

Question 23

what makes connections within same hemispheres

Answer 23

association fibers

Question 24

arcuate fibers

Answer 24

short fibers connecting one gyrus to another

Question 25

longitudinal fasciculi

Answer 25

connect frontal lobe to other lobes

Question 26

commissural fibers

Answer 26

make connections between hemisphere

• corpus callosum
• anterior commissure

Question 27

alzheimers disease

Answer 27

progressive degenerative brain disease

• 5-15% > 65 years old develop AD
• 50% > 80 years old develop AD
• abnormal protein deposits within neurons in brain; leads to nerve cell death and tissue loss