Nervous system overview

Question 1

what is the cerebral cortex?

Answer 1

thin layer, size of a napkin that is folded up
on the surface of the brain
most evolved

Question 2

what are the nervous systems planes?

Answer 2

coronal - front and back
sagittal - left and right
horizontal - upper and lower

Question 3

what are the nervous systems axes?

Answer 3

anterior - front
posterior - back
dorsal - up
ventral - down
medial - middle
lateral - less middle

Question 4

what is the CNS made up of?

Answer 4

brain and spinal cord

Question 5

what is the PNS made up of?

Answer 5

nerves and autonomic nervous system

Question 6

what makes sure the blood doesn’t touch the CNS?

Answer 6

the blood brain barrier

Question 7

how does the nutrients and oxygen reach the CNS?

Answer 7

through the cerebral spinal fluid

Question 8

what holds the cerebral spinal fluid in the brain?

Answer 8

ventricles

Question 9

what is the cerebellum?

Answer 9

highly folded
motor control
learning how to move

Question 10

what is the outer layer of the cerebrum called?

Answer 10

cortex

Question 11

what are the 4 lobes the cortex is spit into?

Answer 11

frontal
parietal
occipital
temporal

Question 12

what is the parietal lobe for?

Answer 12

spacial information

Question 13

what does the occipital lobe do?

Answer 13

process vision

Question 14

what is the function of the temporal lobe?

Answer 14

processing the WHAT
what are we seeing, experiencing and hearing

Question 15

What does the brain do?

Answer 15

regulates and control movements and regulates homeostasis
can only do this by signaling to organs, ect through nerves

Question 16

what are the links of the CNS and the body?

Answer 16

nerves
they come out of the brain and spinal cord

Question 17

what is the autonomic nervous system?

Answer 17

involved in regulating internal organs

Question 18

what is the 2 systems in the autonomic nervous systems?

Answer 18

sympathetic nervous system
parasympathetic nervous system

Question 19

what is the sympathetic nervous system?

Answer 19

increase the body’s use of energy
fight or flight
stress

Question 20

what is the parasympathetic nervous system?

Answer 20

activates the body’s consumption (eat food) and storage of energy
rest and digest

Question 21

what is the nervous system organized in?

Answer 21

a hierarchy

Question 22

what are the basic parts of a neuron?

Answer 22

soma
dendrites
axon
axon hillock

Question 23

what is the soma on a neuron?

Answer 23

the cell body

Question 24

what is the dendrites on a neuron?

Answer 24

branches from the cell body
receive signals from other neurons

Question 25

what is the axon of a neuron?

Answer 25

branching extention from cell body
transmit signals to other neurons

Question 26

what is the axon hillock of a neuron?

Answer 26

connection between soma and axon

Question 27

what are astrocytes?

Answer 27

interference between circulatory system and nervous system (blood brain barrier)
Provide structural support
modulate local neuron activity

Question 28

what are oligodendrocytes and Schwann cells?

Answer 28

wraps around axon with “myelin”
oligodendrocytes found in CNS
Schwann cells found in PNS

Question 29

why is it important that the axons are myelinated?

Answer 29

important for electrical transmitting
with out it can’t transmit a signal