Nerves 1-3

Question 1

<p>What are the dendrites on a nerve cell?</p>

Answer 1

<p>Where the nerve cell receives information</p>

Question 2

<p>What is the name given to the body of a nerve cell?</p>

Answer 2

<p>Soma</p>

Question 3

<p>What are the 4 different types of glial cell?</p>

Answer 3

<p>Astrocytes, oligodendrocytes, microglia and appendimal cells</p>

Question 4

<p>What is the function of astrocytes?</p>

Answer 4

<p>Maintains chemical concentrations and gradients</p>

<p>Removes waste Repair</p>

<p>Important contribution in the BLOOD BRAIN BARRIER</p>

Question 5

<p>What are the glial cells in the PNS?</p>

Answer 5

<p>Satellite cells and schwann cells</p>

Question 6

<p>What do satellite cells surround?</p>

Answer 6

<p>They surround the sensory and autonomic ganglia</p>

Question 7

<p>What is the function of satellite cells?</p>

Answer 7

<p>They regulate the microenvironment of the ganglia in the peripheral nervous system</p>

Question 8

<p>Which glial cells are responsible for providing the myelin sheath around the axons?</p>

Answer 8

<p>Oligodendrocytes and schwann cells</p>

Question 9

<p>What is the function of microglial cells?</p>

Answer 9

<p>Immune role, Ingest cells and pathogens</p>

Question 10

<p>What is the function of appendimal glial cells?</p>

Answer 10

<p>Filters blood to make CSF</p>

Question 11

<p>What portion of the nervous system is responsible for gut activity?</p>

Answer 11

<p>The enteric system</p>

Question 12

<p>The cortex contains grooves, what is the name given to a groove that surrounds a gyrus?</p>

Answer 12

<p>A sulcus</p>

Question 13

<p>What is the cortex?</p>

Answer 13

<p>The outer layer of the cerebrum consisting of folded grey matter</p>

Question 14

<p>What is the cerebellum responsible for?</p>

Answer 14

<p>Coordinates and regulates muscular activity</p>

Question 15

<p>What is the function of the cerebrum?</p>

Answer 15

<p>It is associated with higher brain power such as thought and action</p>

Question 16

<p>What is the name given to the 4 lobes of the cerebrum?</p>

Answer 16

<p>Occipital, frontal, temporal and parietal</p>

Question 17

<p>What does the brain stem contain?</p>

Answer 17

<p>Midbrain, pons and the medulla oblongata</p>

Question 18

<p>What does the diencephalon contain?</p>

Answer 18

<p>It is the posterior part of the brain and it contains the epithalamus, thalamus and the hypothalamus</p>

Question 19

<p>Which part of a nerve cell triggers the action potential?</p>

Answer 19

<p>Axon hillock</p>

Question 20

<p>Where can you find interneurones?</p>

<p></p>

Answer 20

<p>In the CNS</p>

Question 21

<p>What is depolarization?</p>

Answer 21

<p>When the cell membrane potential becomes more positively charged</p>

Question 22

<p>Why is a cell normally electronegative?</p>

Answer 22

<p>Because of a higher portion of positive ions outside the cell</p>

Question 23

<p>What causes the cell to hyperpolarise?</p>

<p></p>

Answer 23

<p>The movement of potassium ions out of the cell via potassium channels</p>

Question 24

<p>Give examples of graded potentials</p>

<p></p>

Answer 24

<p>Generator potentials,</p>

<p>post synaptic potentials,</p>

<p>end plate potentials</p>

Question 25

<p>Why are graded potentials described as decremental?</p>

Answer 25

<p>Current leaks out the membrane as you travel away from the source</p>

Question 26

<p>How can you create an IPSP?</p>

Answer 26

<p>Opening chloride ion channels (fast)</p>

<p>Opening more chlorine channels (slow - acts via G protein)</p>

Question 27

<p>How can you create an EPSP?</p>

Answer 27

<p>Opening more sodium channels or closing potassium channels</p>

Question 28

<p>Why is the sodium channel described as a mono-valent non-specific cation channel?</p>

Answer 28

<p>Some potassium can travel as well</p>

Question 29

<p>What is the summation of EPSP's?</p>

Answer 29

<p>EPSP can accumulate from many inputs</p>

Question 30

<p>What is temporal summation?</p>

Answer 30

<p>When you get two EPSP's from the same synapse in close succession</p>

Question 31

<p>What is spatial summation?</p>

Answer 31

<p>When there is an accumulation of EPSP's from different synapses</p>

Question 32

<p>Which synapses will suffer less decay?</p>

Answer 32

<p>Those closer to the axon hillock</p>