Nervous System

Question 1

Epilepsy

Answer 1

Irregular firing of neurons causes seizures

Question 2

Stroke

Answer 2

Part of brain dies from lack of blood

Question 3

Aneurism

Answer 3

One of blood vessels in brain distended and weakened, can rupture and cause bleeding

Question 4

Parkinson’s

Answer 4

Neurons that make dopamine are dying

Question 5

Alzheimer’s

Answer 5

Abnormal buildup of toxic proteins that cause dementia

Question 6

All parts of the brain work together

Answer 6

True

Question 7

Plasticity

Answer 7

Ability of brain to change and adapt (blah blah changed my brain chemistry)

Question 8

Brain plasticity increase with age

Answer 8

False, decrease

Question 9

Synaptic pruning

Answer 9

During infancy some neurons and synapses are eliminated to help neurotransmission

Question 10

Reflex arc

Answer 10

Interneuron at spinal cord elicits fast response (tapping the knee)

Question 11

Spinal injury

Answer 11

Typically crush the tissue, causing loss of myelin sheath
There is no regeneration of axons
THEY DO NOT COME BACK!

Question 12

Axonal Injury

Answer 12

Can restore significant function (outside of CNS and does not affect cell body)
New axon grows from growth cone
Goes at 1mm per day

Question 13

Oligodendrycytes

Answer 13

Schwann cells, create myelin sheath

Question 14

Astro gets

Answer 14

Aid in metabolic exchange between neurons and blood

Question 15

Microglia

Answer 15

Immune role, digest pathogens

Question 16

Ependymal cells

Answer 16

Epithelial cell that lines the ventricles of brains and keeps cbs fluid flowingg

Question 17

Nerve

Answer 17

Axons bundles, blood vessels, connective tissue holds it together

Question 18

Neurons in PNS only synapse other neurons

Answer 18

False, they also synapse cells that aren’t neurons

Question 19

Long term potentiation

Answer 19

The strengthening of a synapse

Question 20

Steps of L.T.P