5.1 + 5.2

Question 1

What are the two ways to functionally divide the nervous system?

Answer 1

1. Somatic, enteric, autonomic
2. Sensory, motor, integrated

Question 2

What are the three key abilities of a neuron that enable it to function?

Answer 2

• Excitability
• Conductivity
• Secretory capacity

Question 3

What structures are in the soma of a neuron?

Answer 3

• Nucleus
• Rough ER
• Cytoskeleton
• Golgi Apparatus
• Mitochondria

Question 4

What are multipolar neurons? Where are they found?

Answer 4

• Two or more dendrites, and one main axon
• Found in efferent motor neurons, and interneurons

Question 5

What are bipolar neurons? Where are they found?

Answer 5

• Two main processes: one main axon, and one main dendrite
• Rare, found in special sense organs where they relay information from receptors to other neurons

Question 6

What are unipolar/speudounipolar neurons? Where are they found?

Answer 6

• Only one axopn from cell body
• Seen in sensory fibres

Question 7

What are the four layers of the blood brain barrier

Answer 7

• Tight junctions between endothelium
• Pericytes
• Podocytes of astrocytes
• Basement membrane

Question 8

What are the two types of EMG?

Answer 8

• Surface (electrodes placed on skin)
• Intramuscular (thin wires inserted into muscle; more accurate)