1 L1 Intro to Neurophysiology

Question 1

What CNS glia form the myelin sheath in the CNS

Answer 1

Oligodendrocytes

Question 2

What CNS glia provide nutrients, maintain extracellular environment, and provide structural support

Answer 2

Astrocytes

Question 3

What CNS glia form the immune response

Answer 3

Microglia

Question 4

What CNS glia circulate and produce
cerebrospinal fluid

Answer 4

Ependymal cells

Question 5

What PNS glia form the myelin sheath in the PNS

Answer 5

Schwann cells

Question 6

What PNS glia provide nutrients and structural support to neurons

Answer 6

Satellite cells

Question 7

What form can input and output AP be

Answer 7

Excitatory and Inhibitory

Question 8

Compare and contrast Electrical synapse and Chemical Synapse

Answer 8

Electrical- very fast, ions flow from cell to cell, can be bidirectional
Chemical- slower, relies upon chemical crossing the gap, complex, unidirectional

Question 9

Describe the relationship between sensory axons from the body and the somatosensory map

Answer 9

The sensory map is distorted.
Small receptive field + High receptor density= Large area on sensory map

Question 10

What are the two forms that neural “information” can take

Answer 10

Chemical and Electrical

Question 11

What type of signalling is within a single nerve cell

Answer 11

Electrical

Question 12

What type of signalling is between nerve cells/between nerve and non-nerve cells

Answer 12

Chemical

Question 13

Define the resting membrane potential

Answer 13

The electrical potential across the membrane of an inactive nerve cell

Question 14

Describe action potentials and local potentials

Answer 14

When excitable cells are active, the potential (voltage) across the membrane changes very briefly