Primary Tissue Types (nerves)

Question 1

Functions of nervous system:

Answer 1

1: reception of information from external and internal environment
2: integration and analysis of info
3: generate new signals
4: conduction of neural messages to effectors

Question 2

Types of neuron:

Answer 2

1. Sensory/afferent neuron
2. Motor/efferent neuron
3. Interneuron

Question 3

What are found in grey matter and white matter?

Answer 3

Grey: (outer part of brain, inner part of spinal cord) neuron cell bodies

White: (inner part of brain; outer part of spinal cord) axons and dendrites

Question 4

4 principal types of neuroglia (glial cells):

Answer 4

Astrocytes
Ependymal cells
Microglia
Oligodendrocytes

Question 5

Function of astrocytes:

Answer 5

Forms connection between blood vessels and CNS (blood brain barrier)

Question 6

Function of oligodendrocytes:

Answer 6

Cytoplasm of oligodendrocytes forms myelin sheath around axons (cytoplasm from one cell can provide myelin for more than one axon)

Question 7

Function of ependymal cells:

Answer 7

Ciliated columnar cells that act as epithelial lining of brain ventricles and spinal canal

Question 8

Function of microglia:

Answer 8

Essentially the macrophage of CNS (a form of monocytes)

Question 9

Myelination of PNS by:

Answer 9

Schwann cells

Question 10

Examples of peripheral nerve endings:

Answer 10

1. Free nerve endings

2. Merkel cells

Question 11

Examples of encapsulated nerve endings:

Answer 11

1. Pacinian corpuscle
2. Meissner’s corpuscle
3. End bulbs of Krause
4. Corpuscle of Ruffini
5. Genital corpuscle
6. Neuromuscular spindles
7. Neurotendinous endings (of Golgi)