The Nervous System

Question 1

Neuroglia

Answer 1

the cells that support and maintain cells of the nervous system. Can be subdivided into macroglia and microglia.

Question 2

Types of junctions occurring between neurones and other excitable tissues

Answer 2

• Synaptic • Neuromuscular • Neuroglandular

Question 3

Afferent neurone

Answer 3

Sensory neurone - conveys info to the CNS

Question 4

Efferent neurone

Answer 4

Motor neurone - conveys info from the CNS

Question 5

Synaptic junction

Answer 5

• Neurone to neurone • Can be excitatory or inhibitory • Only in grey matter

Question 6

Neuromuscular junction

Answer 6

• Neurone to muscle cell • Always excitatory in skeletal muscle

Question 7

Neuroglandular junction

Answer 7

• Neurone to glandular cells • Most secretory glands • Can be excitatory or inhibitory???

Question 8

3 main types of neurones

Answer 8

• Multipolar • Bipolar • Unipolar

Question 9

Multipolar

Answer 9

• One single axon with multiple dendrites • Most common neurone type • Typical for motor neurones and interneurones

Question 10

Bipolar

Answer 10

• Special senses • One single axon and one dendrite • Relatively uncommon • Restricted mainly to sensory pathways (vision, taste, hearing, balance)

Question 11

Unipolar

Answer 11

• Single process leaves cell body and divides in two
• Both structures resemble axons structurally but functionally one acts like a dendrite and the other like an axon
• Characteristic of general sensory neurones